OBD-1 Code 25 "A/F Lean" Question Options

[jasonrobo02]

Hey all,

I've searched and I haven't been able to come up with an answer to what may be causing the CEL on my 1994. The CEL comes on once in awhile. I haven't noticed any change in driveability or gas mileage. The light will go off after turning off the car and will stay off until another "trip condition" occurs maybe 10 or 100 miles later. The code is stored in memory though and will blink a 25 when I jumper the diagnostic port.

I have recently replaced the 02 sensor and no change. I was hoping that someone had some insight as to what may be causing the CEL.

Thanks in advance for any help.

[Bitter]

could be a vac leak, sticky injector, bad fuel pump, clogged fuel filter, bad new O2 sensor (was it OEM Denso or universal?)

[jasonrobo02]

could be a vac leak, sticky injector, bad fuel pump, clogged fuel filter, bad new O2 sensor (was it OEM Denso or universal?)

It was a universal 02 sensor. But my thinking is if the sensor was bad, a more specific 02 sensor code would trip.

I did a 5 minute visual of the vacuum lines and none seemed to be cracked or anything. But maybe a more indepth check will turn something up.

Thanks. I guess I'll have my hands full tomorrow trying to check these things out.