Engine Controls - MIL ON/Multiple DTC's Set
97 08 292014825/3
December 22, 2008.
Supersedes Technical Service Bulletin Group 97 number 07-11 dated August 17, 2007 for reasons listed below.
Affected Vehicles
01 MIL on due to lambda sensor malfunction
Condition
Customer may report an illuminated malfunction indicator lamp on instrument cluster due to one of the following fault entries present in the engine control unit memory:
- DTC P2237 (O2 Sensor Positive Current Control Circuit Bank 1 Sensor 1 Open),
- DTC P2240 (O2 Sensor Positive Current Control Circuit Bank 2 Sensor 1 Open),
- DTC P2626 (Linear Lambda Probe, Exhaust Bank 1/ Balance Wire Pump Current, Open),
- DTC P2629 (Linear Lambda Probe, Exhaust Bank 2/ Balance Wire Pump Current, Open),
- DTC P3148 (Exhaust Bank 3, Sensor 1 Heater Control at Upper Limit),
- DTC P3150 (Exhaust Bank 4, Sensor 1 Heater Circuit Control at Lower Limit),
- DTC P3161 (Linear Lambda Probe, Exhaust Bank 1/ Balance Wire Pump Current, Open),
- DTC P3162 (O2 Sensor Pumping Current Trim Circuit/ Open Bank 2, Sensor 1),
- DTC P3163 (O2 Sensor Pumping Current Trim Circuit/ Open Bank 3, Sensor 1),
- DTC P3164 (O2 Sensor Pumping Current Trim Circuit/ Open Bank 4, Sensor 1),
- DTC P3255 (Bank 1, Oxygen Sensor Before Catalytic, Heater Circuit Regulation at Upper Impact),
- DTC P3257 (P3257, Bank 2, Oxygen Sensor Before Catalytic, Heater Circuit Regulation at Upper Stop),
- DTC P3278 (Linear Lambda Probe, Exhaust Bank 3/ Pump Current Open),
- DTC P3268 (Linear Lambda Probe, Exhaust Bank 2/ Pump Current Open),
- DTC P3288 (Linear Lambda Probe, Exhaust Bank 4/ Pump Current Open).
Technical Background
Faulty lambda sensor and/or resistance on the electrical contacts for lambda sensor wiring.
Production Solution
Not applicable.
Service
1. Replace the lambda sensor that triggered the fault memory entry.
2. Solder the electrical contacts for all lambda sensors to their respective wires (engine harness side only) by performing the procedure below.
Figure 1:
a. Disconnect engine harness from sensor.
Figure 2:
b. Remove secondary lock from connector.
Figure 3:
c. Remove contact from connector using V.A.S. 1978/4A tool.
Figure 4:
d. Solder crimp connection while making sure solder area is clean, heated thoroughly and an appropriate amount of solder is used.
Figure 5:
e. Allow contact to cool. Reinstall contact with secondary lock and reconnect to sensor.
3. Perform the procedure one contact and one sensor at a time until all contacts for the lambda sensors are soldered.
Warranty
Required Parts and Tools
All parts and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service manuals for the latest information.