Engine Controls - MAF/IAT Sensor DTC Troubleshooting: Overview
Date: November 2009Order No.: S-B-07.61/039d
Supersedes: S-B-07.61/039c (May 2006)
Group: 07.61
Revision History:
Revision Date Purpose
d November Models 204, 207 and 212 Added.
2009
c May 2006 Additional Models application (164.175, 219.375, 251.175)
b June 2005 Applies to all Model 215 and 220 vehicles;
screen shots and notes under Step B/B1 Changed
SUBJECT:
TROUBLE SHOOTING FAULT CODES RELATED TO:
^ ADAPTATION LIMITS OF LAMBDA CONTROL
^ MASS AIR FLOW SENSORS / INTAKE AIR TEMPERATURE SENSOR
MODELS
This bulletin explains how to troubleshoot fault codes P2004-[ ], P2006-[ ], P2017-[ ], P2086-[ ], P2016-[ ], and P2085-[ ] by providing a special fault tree for each P-code. Troubleshoot each fault code by solving it before moving onto the next code. If you have no codes or a code other than the above P-codes DO NOT REPLACE THE AIR MASS SENSOR.
Requirements for ALL air mass sensor replaced under warranty:
^ Printout of all fault codes of the ME2-SFI-motor electronics (short test).
^ Freeze frame data of all fault codes stored in the ME2-SFI-motor electronics.
^ Signal voltage printout Fig. 4 (page 10) of component B2/5 (Hot film MAF sensor).
^ Returned MAF sensors without the required information will be debited back to the dealer.
Note:
Only original, readable printouts with the VIN number (DAS-readout) of the vehicle are accepted. The required printouts can be made only with DAS-Version starting 02/04. All mass air flow sensors will be tested and if found to be functioning correctly will be sent back to the dealer and the corresponding claim will be debited.
In case of Warranty, use the table above.