HELP with Check Engine Light
#11
Thanks, fuse 6 looks to be good
#15
sorry for the delay - the header came in and i installed that along with a new upstream o2 sensor.. erased the p0135 with scanner and instantly come back on again.. also while installing the header i noticed the engine code on the block f23a7 so it seems it is not ulev but has a ulev valve cover.. i checked the resistance of the sensor and it went to 19ohms and the others test showed 12 volts dc which all seems to be to spec? any further help would be appreciated!
#16
#17
#18
The link states:
"If the Diagnostic Trouble Code does come back... there are several possible scenarios:
"If the Diagnostic Trouble Code does come back... there are several possible scenarios:
- Intermittent short in the O2 Sensor's wiring (that only presents itself when the vehicle is in motion).
- A BAD O2 Sensor (even tho' it tested OK in this test section).
- A BAD Fuel Injection Computer (this is rare, but it does happen).
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