[Guest]

My "Check Engine" light came on today on my newly-purchased '94 G20t. It had 98,500 miles when the light appeared.

I'd refer to a service manual if'n I had one. Any ideas? Everything seemed fine, so I continued on my 300 mile journey. Oxygen sensor perhaps? Thanks in advance!
-Don

 

[redman007]

self diagnosis but get the manual on your car only18 bucks. easy to do 5 min.

 

[Storm88000]

Do the self-test. The ECU is located like kinda under the radio and climate controls.

 

[94_REDSE-R]

I say Oxy sensor.
It happened to my '94 SE-R. and that fixed it right up. GOOD _luck!

 

[Guest]

It is almost always the O2 sensor gone bad. 99% of the time with no question. The check engine light refers to the emissions system on most cars.