Vehicle OEM Database

The database contains a vehicle's DLC location and any provided TSB notifications and documents.

DLC Images may not be available for vehicles newer than 2004 model year. A previous model year and similar model may be referenced for general identification of the DLC appearance. Do not contact the OBD Clearinghouse personnel if the vehicle being researched does not have a related image. Thank you.

Database

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Recent Documents
SSM 51411 2021-2022 F-150 - 04/29/2024

SSM 51411 2021-2022 F-150 - May Not Communicate With Emissions Testing Equipment
SSM 50602 - 2021 F-150 - 04/29/2024

SSM 50602 - 2021 F-150 - No Vehicle ID Or Communication With State Emissions Testing Machine
Ford Gateway Module Repair - 12/15/2023

Customer Satisfaction Program 22N15 Certain 2020-2023 Model Year Bronco Sport, Escape, Corsair, E-Series, F-650/F-750, F-53 Motorhome Chassis, F-59 Commercial Stripped Chassis Vehicles Equipped with Smart Data Link Connector (SDLC) Gateway Module Reprogramming for Inspection and Maintenance (I/M) Testing
Documents
SSM 51411 2021-2022 F-150 - 04/29/2024

SSM 51411 2021-2022 F-150 - May Not Communicate With Emissions Testing Equipment
SSM 50602 - 2021 F-150 - 04/29/2024

SSM 50602 - 2021 F-150 - No Vehicle ID Or Communication With State Emissions Testing Machine
Ford Gateway Module Repair - 12/15/2023

Customer Satisfaction Program 22N15 Certain 2020-2023 Model Year Bronco Sport, Escape, Corsair, E-Series, F-650/F-750, F-53 Motorhome Chassis, F-59 Commercial Stripped Chassis Vehicles Equipped with Smart Data Link Connector (SDLC) Gateway Module Reprogramming for Inspection and Maintenance (I/M) Testing
Mulsanne Engine Control Update - 12/11/2023

Engine control module update - Mulsanne (SC 23/12)
Bentayga V8 Kovomo - DTC P11DE00 Incorrect Cylinder Allocation - 04/14/2023

Bentayga V8 Kovomo - DTC P11DE00 Incorrect Cylinder Allocation (TPI 2061054-2) English
Audi A012332 - 02/27/2023

01 Drive system fault OR no engine start - P019100, P008700, P008800 - 5-cyl. TFSI
Audi A012225 - 02/27/2023

01 Drive system fault OR no engine start - P019100, P008700, P008800 - 5-cyl. TFSI
TSB_Freightliner Sprinter_Crankshaft Sensor Plausibility Check_Fuel Injection Monitoring - 02/24/2023

Instructions for handling fault codes for 'Position sensor of crankshaft' in combination with fault codes for 'Output stage fuel injector' in the CDI control unit in the following Freightliner Sprinter Vans: Model 906 (MY14-16) with engine OM651 Model 907 (MY21) with engine OM642 or engine OM651
TSB_Mercedes-Benz Sprinter_Crankshaft Sensor Plausibility Check_Fuel Injection Monitoring - 02/24/2023

Instructions for handling fault codes for 'Position sensor of crankshaft' in combination with fault codes for 'Output stage fuel injector' in the CDI control unit in the following Mercedes-Benz Sprinter Vans: Model 906 (MY14-16) with engine OM651 Model 907 (MY21) with engine OM642 or engine OM651
TSB_MB Sprinter_Water Pump Diagnostic_new ECU software needed - 11/23/2022

Water Pump Diagnostic – Short Circuit to Battery – Fault P2603 healing in generic scan tool Mode$0A
TSB_FTL Sprinter_Water Pump Diagnostic_new ECU software needed - 11/23/2022

Water Pump Diagnostic – Short Circuit to Battery – Fault P2603 healing in generic scan tool Mode$0A
TSB_ID191 Water Pump Diagnostic Short Circuit to Battery Fault healing issue_v3_final - 11/23/2022

Water Pump Diagnostic – Short Circuit to Battery – Fault P2603 healing in generic scan tool Mode$0A
TSB_ID202 - Mode06 NOx sensor upstream v7_van - 06/15/2022

The value of exhaust gas sensor monitor in the generic scan tool (mode $06) may be display an exceeded limit value before a fault code was set (mode $07)
A972283 sporatic check engine light no fix - 06/10/2022

PSS 97 Yellow check engine lamp sporadically lights up in the instrument cluster: DTC U014000 and U110100 are stored
Nissan Rouge 2020 Odometer Scaling TSB - 06/03/2022

Nissan has identified an issue with the vehicle odometer information that is provided by PID $A6, when using a Generic Scan Tool (GST) on 2020 Rogue vehicles. When using a GST on 2020 Rogue vehicles, the information provided in PID $A6 is incorrectly scaled, resulting in the vehicle’s odometer data indicating 10 times the actual odometer’s value.
Mercedes-Benz Mode06 NOx sensor TSB - 05/04/2022

The value of exhaust gas sensor monitor in the generic scan tool (mode $06) may be display an exceeded limit value before a fault code was set (mode $07)
Audi E-tron TSB A932268 - 02/22/2022

93 High-voltage battery charger control module reports under wrong diagnostic address after being replaced 93 22 68 2063427/2 February 15, 2022. Supersedes Technical Service Bulletin Group 93 number 21-52 dated June 3, 2021
Mercedes Benz TSB ID187 SCR inducement Van - 02/17/2022

SCR-Inducement System PID 88 in the Generic Scan Tool is cleared after ignition change
Mercedes-Benz TSB ID188 IMAP Van - 02/17/2022

The signal Inlet manifold pressure (PID $0B) may be displayed incorrectly in Mode$1 and Mode$2 under high load driving conditions
Mercedes-Benz TSB ID187 SCR Inducement - 02/17/2022

SCR-Inducement System PID 88 in the Generic Scan Tool is cleared after ignition change
Mercedes-Benz TSB ID188_IMAP - 02/17/2022

The signal Inlet manifold pressure (PID $0B) may be displayed incorrectly in Mode$1 and Mode$2 under high load driving conditions
Mercedes-Benz TSB GI00.30-P-073860 - 02/17/2022

The monitor status this driving cycle (PID 41) can be displayed as “disabled” in the generic scan tool although no monitor of this group is disabled
Bentley Technical product information 2065664 - 01/10/2022

Bentayga V8 Kovomo - Engine MIL light on - DTC “O2 Sensor Signals Swapped Bank 1 Sensor 2/ Bank 2 Sensor 2
Mercedes-Benz Vans CV Bulletin LI00.30-N-074118 - 01/05/2022

The “monitor status this driving cycle (PID 41)” can be displayed as “disabled” in the generic scan tool although no monitor of this group is disabled
Nissan Technical Bulletin NTB21-086 - 09/17/2021

Certain vehicles may require the ECM to be replaced or reprogramed.
Infiniti Technical Bulletin ITB21-009 - 09/17/2021

Certain vehicles may require the ECM to be replaced or reprogramed.
Subaru Service Bulletin(09-79-21) - 09/02/2021

related to Lifetime Tracking Data Display
Audi A6, A7 TSB - 04/15/2021

PSS 01 3.0TFSI Bank 2 engine misfires - A6 and A7
Audi Q7,Q8 TSB - 04/15/2021

PSS 01 3.0TFSI Bank 2 engine misfires - Q8/Q7 (DCBD engine)
TSB_07.16-N-071521 - 03/22/2021

Instructions for handling fault code P167200 in combination with misfire fault codes
TSB_07.16-N-072398 - 03/22/2021

Instructions for handling fault code P011684 in combination with fault codes for air path, coolant thermostat, or coolant water pump
Mercedes-Benz TSB_07-16-p-072408_v3 - 03/19/2021

Instructions for handling fault code P167200 in combination with air path system or coolant thermostat fault codes
Ford 2020-2021 SSM - 03/18/2021

SSM for corsair, escape, e-series, and bronco sport for model years 2020~2021, 2020~2021, 2021~2022, and 2021 respectively.
Bentley Bentayga Hybrid - AC Charging Timer Does Not Function (TPI 2060117-1) - 07/22/2020

The AC charging timer does not function. The customer has difficulties with timed charging. Immediate charging works correctly, but when using timed charging there is a problem “ waking up” the on board charger. Currently in the event of an issue that causes the vehicle not wake correctly to begin charging at the requested time, the system cannot inform the customer that there has been an issue.
Audi high voltage battery charging does not work if the timer is used - 07/22/2020

Immediate charging works correctly, but in the case of timed charging there is a problem with waking up the integrated charger in order to start charging
VW TSB for 2006-2021 All - 06/15/2020

TSB 00-17-13 for Fuel Additive to help prevent sporadic misfire faults (gasoline engines only)
Audi TSB for 2019 A8 - 04/06/2020

A software update is pending for 2019 Audi A8 with 3.0TFSI engines with a misfire when using winter blend fuels
2004-2008 Suzuki Forenza Reno O2 Monitor - 03/17/2020

OBD system DTC confirmation procedure for Oxygen Sensor on 2004-2008 Forenza, Forenza wagon, and Reno
2004-2008 Suzuki Forenza Reno O2 Heater Monitor - 03/17/2020

On-Board Diagnostic (OBD) system DTC confirmation procedure: Oxygen sensor heater. Forenza, Forenza wagon, Reno.
2004-2008 Suzuki Forenza Reno EGR Monitor - 03/13/2020

OBD system DTC confirmation procedure for Exhaust Gas Recirculation on 2004-2008 Suzuki Forenza, Forenza Wagon, and Reno
2004-2008 Suzuki Forenza Reno EVAP Monitor - 03/13/2020

OBD system DTC confirmation procedure for Evaporative Emission System on 2004-2008 Suzuki Forenza, Forenza Wagon, and Reno.
2004-2008 Suzuki Forenza Reno Catalyst Monitor - 03/13/2020

OBD System DTC confirmation procedure for the catalyst system on the 2004-2008 Suzuki Forenza, Forenza Wagon, and Reno
2007-2013 Suzuki DLC Locations - 03/13/2020

Suzuki has provided a document showing the DLC locations for 2007-2013 vehicles
Audi TSB for 2019 A6 and A7 Vehicles - 01/19/2020

A software update has been released for MY 2019 Audi A6 and A7 vehicles addressing a misfire condition when using winter blend fuel.
Audi TSB 2019/2020 Q8 Vehicles - 01/19/2020

A software update has been released for Audi Q8 2019-2020 vehicles addressing a misfire condition when using winter blend fuel.
VW TSB - ECM Software Update - 01/19/2020

Under certain conditions, the engine may stall at very low speeds for certain 2019 and 2020 VW Jetta GLI and Golf GTI vehicles. An ECM software update has been released to address this issue.
Subaru 2014 - 2016 MY Crosstrek Hybrid Display Incorrect DTC Info - 01/23/2019

2014 - 2016 MY Subaru Crosstrek Hybrid (HEV) vehicle can display incorrect DTC information when retrieving freeze-frame data.
VW TSB for Incorrect Calculated Load Value - 12/27/2018

PID$04 Calculated Load Value is permanently too low due to an incorrect scaling on certain 2018 - 2019 Models.
Audi TSB for GST Mode$01 PID$04 Calculated Load Value scaling is incorrect - 12/03/2018

When using Generic Scan Tool (GST) PID$04 Calculated Load reading shows unusual values in Mode$01 and Mode$02. Affected MY 2017-2019
Toyota State I/M Program Advisory - 10/15/2018

Various 2018 MY Toyota models now show O2 heater as unsupported. This document discusses why these vehicles indicate heated O2 monitor is unsupported as well as future action recommended by CARB.
BMW G12(7-series) B070315 - 04/21/2017

Supporting documentation for the SI B07 03 15 BWM technical service bulletin.
BMW G12 (7-series) Diagnostic Mode - 04/21/2017

With the introduction of the new G12 7 series vehicle, a new terminal control concept was introduced. In order to switch the vehicle into diagnostic mode for the State Inspection Maintenance Program, the Start/Stop button must also be pressed 3 times in succession within .8 seconds.
BMW Oxygen Sensor - Readiness Code Monitor is Not Set - 12/02/2016

BMW has posted a document for their MY 2000 3 Series vehicles. A software update may be needed when these vehicles won't pass an I/M inspection due to the Oxygen Sensor readiness monitor being not set,not fitted, or not supported.
Subaru I/M Advisory Bulletin - 12/02/2016

Subaru of America, Inc. has determined that there is a typographical error on the underhood VECI label for Subaru Legacy 2.5GT 6MT models with turbo engine.
2007 Toyota Highlander Hybrid Vehicle (HV) & Lexus RX400h Air Fuel (A/F) Sensor Monitor Readiness Shows Incomplete - 12/02/2016
AF Monitor Incomplete_SSC F0P - FLD.docx
A software error in the subject vehicles will prevent the readiness indicator for Air Fuel (A/F) sensor monitor from setting, possibly preventing the vehicle from passing an OBD based inspection due to the lack of adequate system readiness. However, the monitor does function, and will detect a malfunction if one exists and illuminate the Malfunction Indicator Lamp (MIL). Toyota has developed new engine control software logic to prevent this condition from occurring (the oxygen sensor readiness will set to complete once the required A/F and rear O2 sensor monitors run and complete). This condition will be corrected by Toyota Special Service Campaign (SSC) F0P with Toyota TSB T-SB-0042-15 and Lexus SSC FLD with TSB L-SB-0027-15 at no charge to owners. For California owners, the Department of Motor Vehicle (DMV) Registration Renewal/Recall Tie-in Program applies. Please direct any questions or concerns about the contents of this letter to Toyota/Lexus Techinfo Support, I & M Programs Administrator at (877) 762-7666.
VW Tech Tips for No Communication - 12/02/2016

VW tech tip regrading no communication concerns related to aftermarket monitoring devices.
Fiat Chrysler Automobiles (FCA) Atypical VIN Issue - 12/02/2016

Automotive News article regarding the FCA atypical VIN issue.
Fiat Chrysler Automobiles (FCA) Atypical VIN Issue - 12/02/2016

FCA response to the fact that a number of new model 2015 Jeep Renegade and 2016 Fiat 500X vehicles were built in March and April 2015 with an atypical Vehicle Identification Number (VIN) that may not be automatically recognized by some computer systems. FCA has been working with various VIN software decoders to update their systems and accept these VINS as valid. They are now looking for identical assistance from the companies/agencies who develop and own inspection software/devices.
VW TSB for No Communication - 12/02/2016

Volkswagen TSB related to 1997-2001 A4, A6, and A8 vehicles that will not communicate with test equipment when the ABS and/or brake lamp is illuminated.
Cap-Less Fuel System List - 10/23/2013

A list of manufactures and vehicles using a cap-less fuel system.
Audi Q7 MY 2010-2014 TSB: Sporadic Data Disruption - 08/20/2013

There is sporadic data disruption on the CAN bus wiring behind the dashboard for Audi Q7 vehicles with either Gas or TDI engine configurations 2010-2014 MY.
Volkswagen MY 2011-2013 2.0L TDI – Incorrect glow plug faults - 07/31/2013

Volkswagen MY 2011-2013 2.0L TDI – Incorrect glow plug faults
VW TSB for Scan Tool Mode Data Update - 07/31/2013

Volkswagen MY 2012 2.0L TFSI – Engine control module may incorrectly store scan tool mode data
VW Technical Bulletin - 06/20/2013

Correct diagnosis of fault P0441 Using Aftermarket Scan Tool Only (MY 2012 vehicles with 2.0L engines)
Ford 2011MY Lack of Readiness and VIN Mis-match Information - 05/29/2013

2011 Ford Explorer, Edge, and Lincoln MKX with 3.5L and 3.7L Engines – Lack of I/M readiness and VIN reporting error.
Honda Hybrid Battery Warranty Extension - 05/17/2013

American Honda is extending the warranty coverage on the IMA battery module for some 2003–08 Civic Hybrids an additional 12 months or 12,000 miles, whichever comes first.
Nissan and Infiniti Knock Sensor DTCs - 04/22/2013

Knock Sensor Letter to OBD I/M program administrators, OBD test tool manufacturers, and OBD and I/M stakeholders from Nissan concerning MY 2004 and older vehicles.
OBD Readiness Testability Issues - 10/30/2012

Revised EPA document for vehicles with known OBD readiness testablilty issues.
Volvo O2 Sensor Readiness Advisory Update - 10/26/2012

To State Program Administrators: Volvo Car Corporation, LLC (Volvo) has determined that certain 2011 through 2013 Volvo vehicles equipped with a 3.2L six cylinder engine have a calibration error which prevents the O2 sensor readiness from showing complete/ready.
2005MY and NewerSubaru Readiness Set Procedure - 10/16/2012

Advisory bulletin for 2005 MY and newer vehicles on the readiness code set procedure.
2012 GM Truck TCM PID Count Change - 03/19/2012

GM Memo to I/M Community regarding a PID support changes with TCM service calibration release
EPA, CARB, and MA Documentation Regarding the Terrafugia Transition - 02/10/2012

Documents from the EPA, CARB, and MA DEP to Terrafugia acknowledging exemption from vehicle emissions testing for the street-legal aircraft Transition
Terrafugia Transition: Street-Legal Aircraft - 02/10/2012
1328899843-OBD Clearinghouse - Feb, 2012.doc
Letter from Terrafugia, the manufacturer of the street-legal aircraft Transition, explaining that the EPA has classified the Transition as an airplane and is therefore not required to abide by vehicle emissions standards. CARB has also granted an emissions testing exemption for the vehicle.
GM memo to I/M Programs, Test Tool Manufacturers and Stakeholders - 02/08/2012

GM memo identifying supported OBD PID changes for the 2012 Chevy Cruze with 1.4L engine.
GM Letter to I/M Programs - 01/30/2012

GM bulletin regarding TCM Permanent DTCs on certain 2010 vehicles equipped with 3.5L or 3.9L engines and 4 speed transmissions.
2006 GM Small Car Communitation Issue rev1 - 01/23/2012

GM document toOBD I/M program administrators, OBD test tool manufacturers, and OBD I/M Stakeholders. A revised version for a communication issue with 2006 Chevrolet HHR (VIN D) / Cobalt (VIN F), Saturn Ion (VIN F), and Pontiac Pursuit (VIN F) vehicles equipped with 2.2 liter engine.
2007 PID Count Change_rev3.pdf - 01/23/2012

GM document to OBD I/M program administrators, OBD test tool manufacturers, and OBD I/M Stakeholders. A revised version of a PID Status Change for 2007 Chevrolet Tahoe, Suburban, Avalanche; GMC Yukon, Yukon XL with 5.3 Liter Flex Fuel Engines.
Toyota State I/M Program Advisory Communication - 12/09/2011

Subject: VSC Light On with C1336 DTC After OBD Inspection Potential Applicability: Toyota 4Runner 2003, 2004 Lexus SC430 2002-2005 Tundra 2001, 2002 Tacoma 2002-2004 Condition: There has been a rare and difficult to diagnose condition reported on a small number of 2003/2004 4Runners turning on the VSC (Vehicle Stability Control) warning lamp with a Diagnostic Trouble Code C1336, after undergoing I/M OBD inspection. To rectify this condition, a zero point calibration of the deceleration sensor must be performed. For more information about how to avoid this condition, please see the attached documents.
VW Emissions Service Action - 10/03/2011

2005 MY Jetta with 2.5L Engine & Automatic Transmission ECM/TCM Software Update
Letter to I/M Programs from VW - 10/03/2011

Volkswagen - 2005 MY Jetta with 2.5L Engine & Automatic Transmission OBD communication protocol
Subaru I/M Advisory Bulletin 11-106-11 - 08/02/2011

State I/M Program Advisory Bulletin for 2006 Subaru Legacy/Outback 2.5L. VECI Label Reference During State Emission Test
EPA: Imporoving I/M Performance and OBD Monitor Readiness - 05/11/2011

EPA memorandum with an updated list of vehicles that exhibit issues related to OBD monitor readiness (formerly known as Appendix D) as well as suggestions for how I/M programs can improve operational performance by addressing readiness.
VW TSB: Aftermarket Accessories - 03/16/2011

VW TSB explaining how damage to OBD system is possible with improper aftermarket accessory installation.
Drive Cycle for Saab 900 MY '96-'98 Vehciles - 03/10/2011

Saab service bulletin describing drive cycle required to set readiness on 1996-1998 My 900 vehicles with 2.3L engines.
Letter to I/M Programs from Hyundai - 03/10/2011
1299795465-OBD Clearninghouse Letter(Hyundai Veracruz 2007-2008 Readiness).doc
Lettering from Hyundai to State I/M Programs describing issue related to readiness issues found on Veracruz vehicles with 3.8L engines 2007-2008 MY
Hyundai TSB '07-08 Veracruz Readiness Issues - 03/10/2011

TSB Describing Readiness issues for 2007-2008 MY Hyundai Veracruz vehicles equipped with 3.8L engines.
Subaru 2005MY and Newer Readiness Code Set Procedure - 03/08/2011

This bulletin provides information on the readiness code setting procedure for 2005 and newer Subaru vehicles.
Jaguar Letter to State I/M Administrators and Service Technicians - 12/22/2010

Letter from Jaguar describing necessary parameters are met in order to set readiness for certain Jaguar vehicles
Letter to I/M programs from Kia - 12/09/2010

Letter from Kia to I/M programs concerning 2006-2007 Rio EGR/VVT readiness status.
TSB 2006-2007 Kia Rio Readiness - 12/09/2010

TSB for 2006-2007 Kia Rio EGR/VVT readiness status for vehicles with a 1.6L engine.
Letter to I/M programs from Hyundai - 12/09/2010

Letter from Hyundai to I/M programs concerning 2007 Accent EGR/VVT readiness status.
TSB 2007 Hyundai Accent Readiness - 12/09/2010

TSB for 2007 Hyundai Accent EGR/VVT readiness status for vehicles with a 1.6L engine.
Mazda PID Status Change- 2004 Mazda 3 - 12/06/2010

Update from Mazda on supported PIDs for 2004 Mazda 3 2.0L/2.3L Engines
Mazda PID Status Change- 2004 Mazda 3 - 12/06/2010

Update from Mazda on supported PIDs for 2004 Mazda 3 2.0L/2.3L engines
OBD I/M program implementation for Flexible Fuel Vehicles - 09/22/2010

The purpose of this document is to provide additional information on the inspection process of alternative fueled vehicles equipped with On-Board Diagnostic (OBD) systems. Specifically, this document provides additional technical information and impacts on the OBD system monitoring capability when flexible fuel vehicles (FFVs) are operated using alternative fuel. Also, it will assist Inspection and Maintenance (I/M) Programs in implementing OBD system checks and educating owners of FFVs.
EGR Readiness 2008 Saturn Astra - 09/22/2010

GM has provided information relating to a service calibration that, when installed, will change the EGR/VVT readiness support status from 'not supported' to 'supported'. Affected Vehicles: 2008 Chevrolet Astra.
Volkswagen K-line Communication Description - 07/07/2010

OBD Communication Initialization - 07/07/2010

Volkswagen has found that some inspection equipment (or handheld OBD scan tools) have trouble establishing communication with a: 1999 MY VW Golf 1.9L TDI (diesel) 66kW; 2000 MY VW Jetta 1.8L Turbo (gasoline) 110kW; or 2001 MY VW Jetta 2.0L (gasoline) 85kW and may not be able to establish communication at all with these vehicles or may only be able to establish communication with the transmission control module (TCM) (for automatic transmission equipped vehicles).
1997 2.5TL GST Communication Issue - 06/29/2010

1997 Acura 2.5TL has experienced a generic scan tool (GST) communication issue during smog check inspections in several states.
Land Rover 10MY LR2 TCM CVN Reporting - 06/29/2010

Due to a mistake in the TCM software, 2010 model year LR2 vehicles with the TCM software that has CAL ID 31259658 AB will each report a different (unique) CVN.
Verified Generic OBD Communication Protocols - 06/09/2010
1276045151-OBD_generic_protocols_verified_2010-04-12.xls
OBD II Generic Communication Protocol table listed by Make, Model and Model Year
State I/M Program Advisory Bulletin #1-2010 - 03/17/2010

Subject: OBD Communication Initialization 1999-2001 Golf, Jetta All gasoline and diesel (TDI) engines
Volvo Air Conditioning (A/C) Readiness Monitor - 02/17/2010

Volvo Car Corporation, LLC (Volvo) has determined that certain XC90, S40 and V50 vehicles have the A/C readiness mistakenly set to supported instead of unsupported. This means that some technicians or IM administrators may think there are issues with scan tool equipment accuracy, vehicle tampering, or fraud. This letter is to confirm that specific Volvos will indeed report A/C monitor as supported and to provide information regarding which vehicles are affected and what additional actions repair technicians may need to take to get the A/C monitor readiness to report 'ready/complete'.
Chrysler Dual Protocol Issue - 09/29/2009
1254246787-Chrysler OBD Dual Protocol Clearinghouse Letter.doc
Chrysler has provided a document regarding the dual protocol issues for Dodge Truck and Jeep - Engine Control Modules supporting both SAE J1850 and ISO 9141-2 Protocols. Affected vehicles: 1999 - 2004 Jeep Grand Cherokee 2001 - 2004 Jeep Wrangler 2002 - 2003 Jeep Liberty 2001 - 2003 Dodge Dakota 2001 - 2003 Dodge Durango 2002 - 2003 Dodge Ram Pickup
CAN for Vehicle Emissions Data Communication - 12/17/2008

Details of the CAN protocol.