P0135 cause bad fuel trim on bank 2?
10-31-2014, 09:28 AM
#1
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Join Date: Sep 2001
Location: Western North Carolina
Posts: 831
P0135 cause bad fuel trim on bank 2?
Been trying to figure out why my fuel trims are so bad. I've not had a CEL until this morning. P0135. Would this cause the bad trims on bank 2 also or is it an indicationindication that the 02 sensors is bad?
I've checked leaks and found nothing.
I've checked leaks and found nothing.
10-31-2014, 10:40 AM
#2
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Join Date: Nov 1998
Location: Hell was full so they sent me to NJ
Posts: 70,647
Re: P0135 cause bad fuel trim on bank 2?
P0135 indicates the heater circuit for the Bank 1 (left/driver) side pre-cat O2 sensor may be malfunctioning. The heater controls how fast the O2 sensor heats up and starts working. The test is only run on cold start. The code sets when the PCM does not see the sensor start working in the period of time it expects.
Could be a faulty heater element in the O2 sensor, could be faulty wiring to the heater circuit.
Do you have long tube headers?
This would obviously not affect the LTFT's on Bank 2.
Could be a faulty heater element in the O2 sensor, could be faulty wiring to the heater circuit.
Do you have long tube headers?
This would obviously not affect the LTFT's on Bank 2.
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