Can often be a faulty O2 sensor, when they fail they send mixture control to full rich.

Answered by mhpautos (expert)
26,913 answers provided

Your scanner/code reader is not providing you the details of the read out because it is not up to date.
P1135 is a fault with the A/F sensor, commomly known as O2 sensor.

Answered by KHLow2008 (expert)
39,905 answers provided