Quote:
Originally Posted by autojoe
44 is set when 02 indicates lean condition.connect a digital voltmeter to purple wire while connected with a probe that pierces the insulation ex.bed of nails to get voltage unless you have a scan tool. start and run engine 1200 rpm for several minutes and observe voltmeter.if the voltmeter reads 0 volts or very close to zero look for a short to ground in the purple 02 signal wire to ecm.if the purple wire is not grounded replace the ecm.if the voltage is not at zero but remains consistently below 0.35 volts,inspect the following......maf sensor and false air,restricted injectors,contaminated fuel,low fuel pressure,vacuum leaks,exhaust leaks and problems in the air pump system.if all these check out replace 02 sensor.how does the engine run.....rough idle....miss....hesitation....do you have a scan tool?
|
The truck runs fine, I have been driving it for almost 4 years and it drives the same as when I bought it but the code has only been coming up the last year. Since I replaced the fuel pump a year ago. but I even replaced that fuel pump last week with a better AC Delco one and the code still comes on.
I have done a bench test on the O2 sensor and it appears to be fine, it is also less then 2 years old.
When you say "scan tool" do you mean a code reader for OBD or something else?
Thanks alot for the help!