Engine Controls - MIL ON/DTC's P2029/P2046 Set

Date: December 19, 2007

Order No.: P-B-07.08/33a

Supersedes: P-B-07.08/33 dated April 8, 2003

Group: 07

Revision History

Revision Date Purpose

a 12/19/07 Picture Included, Parts and Warranty Information Updated

- 04/08/03 Initial issue

SUBJECT:
Model 203.040/740

Code P2029 and/or P2046 in Engine Control Module

If you receive customer reports in the above model vehicles, MIL activated due to code P2029 (PO172) adaption of mixture formation at rich stop, and/or P2046 (PO130) 02 Sensor upstream (G3/2), sensor signal implausible, please refer to the below causes and related remedies.

Cause 1:

P2029 (PO172) and P2046 (PO130) stored in engine control module - 02 sensor.

Remedy:

Replace 02 sensor (in front of catalyst).

Cause 2:

P2046 (PO130) stored in engine control module - Engine wiring harness.

Remedy:

Check engine wiring harness as follows:

1. Loosen 02 sensor connector (in front of catalyst) from engine wiring harness.

2. Measure resistance on engine wiring harness connector between Pin 2 and Pin 6.

Nominal resistance = 62 Ohm (+/-5 Ohm).

3. If measured resistance is outside of tolerance, disconnect engine wiring harness connector from engine control module and check for damage - repair as necessary.

4. If connector at engine control module is OK, replace engine wiring harness.

Cause 3:

P2029 (PO172) stored in engine control module - Hose for partial load ventilation torn at crankcase connection fitting.

Remedy:





Remove and install partial load ventilation hose, replace as necessary, as indicated in Figure 1.

Also refer to WIS Document AF01.20-P-6100A.





Parts Information

Note:
The following allowable labor operations should be used when submitting a warranty claim for this repair. This information has been generated on December 19, 2007. Please refer to Netstar --> Star TekInfo --> Star Time for the most current labor time allowance.





In Case of Warranty, use the table.