Fuel System - MIL ON/DTC's P2029/P0172/P201C Set
Date: September 9, 2004Order No.: P-B-09.00/18
Supersedes:
Group: 09
SUBJECT:
Model 203.040/740
Check Engine Light On / Engine Rough or Sluggish During Acceleration
If you receive customer reports in the above model vehicles of the check engine light on with DTC P2029
(Self adaptation of mixture formation at rich stop - P0172) or P201C (Self adaptation of mixture formation - P0172), engine running rough or slow/sluggish during acceleration, perform the below remedy to resolve.
This may be caused by a leak in the air intake system.
Remedy:
1. Remove air filter element from air cleaner housing and set sealing cap onto air mass sensor.
2. Support sealing cap in the air cleaner housing using the locking rod.
3. Seal off oil dip stick with stop plug (supplied with leak tester kit).
4. Connect pressure gauge to sealing cap and check intake system for leaks by applying air pressure. Do not exceed maximum pressure of 0.4 bar.
Note:
Leaks can now be located acoustically or can be made visible by applying soapy water.
5. Repair as necessary and use appropriate damage code.
Special Tools
Note:
The following allowable labor operations should be used when submitting a warranty claim for this repair.
In Case of Warranty