Intermittent 02 Sensor DTC P1133 or P1153 - keywords 08 4.8 5.3 6.0 engine HO2S LC9 LH6 LH8 LMG LY2 LY5 LY6 L76 MIL oxygen SES

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

A dealer may encounter a customer concern of a intermittent SES/MIL light coming on with DTC P1133 or P1153 found.

Engineering is interested in vehicles setting these dtcs.

Complete the current SI diagnostics for any trouble codes or symptoms found. If basic diagnostics for DTCs P1133/P1153 are inconclusive, Engineering is interested in speaking directly with the dealer. There are a few questions Engineering would like to answer during the call.

1. What type of driving was the customer doing when the check engine light came on (driving 35mph in the city, 70mph on the highway).
2. Short trip to town vs long trip with trailers.
3. Did they recently fill the vehicle with fuel.
4. Do they know of any repeat set of conditions that seems to turn on the SES light.

Please have all diagnostic information available and contact Engineering using the information below.

Engineering contact:

Doug Moening

Cell Phone

248-431-9760

Guy Winoradski

Cell Phone

248-640-8641

If Doug or Guy is not available, please leave a voice mail with a short message and the phone number you can be contacted at. If you do not hear back from Engineering within 4 hours continue with current SI diagnostics and repairs.

This PI will be updated as new information becomes available.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.