Customer?s complaint may include a MIL-on with one or more of the following DTCs (Active, Pending, or...

Bulletin number

S1918000008

Component

Engine and engine cooling

Summary

Customer?s complaint may include a MIL-on with one or more of the following DTCs (Active, Pending, or Stored) in the PCM: P0133, P0137, P0171, P0300, P2096. The root cause could be due to oil leaking from Bank 1 valve cover seal on to the 1/2 (Bank 1 downstream) O2 sensor. This can adversely affect the 1/2 O2 sensor signal reading and lead to listed DTCs. Before performing normal diagnostic routines for the above codes, check for the condition listed above.

Owners of these vehicles have filed 540 complaints in the engine category.