Nissan Repair: 94 Nissan Quest, engine light on, engine control module ecm, quest engine

Question
Hello Dinger
I have a 1994 Nissan Quest, when the van goes uphill or underlaid the engine light turns on, 5 years ago i paid 100.00 to have the shop fix it, he clean up something inside some of the hoses, now it turns on intermittently as described above, I'd like to do it myself, how can i retrieve the code?, i have replace the O2 sensor behind the manifold once, i need help. Thank you in advance.
Dean

Answer
HI Dean,

The Engine Control Module (ECM) monitors several circuit and components to determine if they are functioning properly. If a malfunction is detected in certain circuits the "MALFUNCTION INDICATOR LAMP" (MIL) illuminates to alert the driver that a problem is occurring. The lamp remains illuminated as long the fault is present.

The ECM stores a code in its memory to aid the technician in diagnosis. If the lamp turns off, the fault is no longer present, but the code is stored for 50 attempted engine starts or until the code is cleared from the memory. This aids in diagnosing intermittent problems.

You will need to take it some where to have the car scanned. Once you retrieve the codes I will gladly help you determine what the repair is. Cottman and Aamco will do this for free. I think Auto-Zone will also.