What do codes 12 or 71 on a 1990 Geo Prizm when the check engine light is on?
1990 GEO PRIZM code 12 = RPM Signal Distributor, distributor circuit,starter signal circuit, igniter circuit igniter, ECM 1990 GEO PRIZM code 71 = EGR EGR system including hoses,gas temperature sensor circuit, gas temperature sensor, vacuum switching valve for the EGR circuit, ECM
Why will a 9th generation Mitsubishi Galant's check engine light come on when nothing is wrong with the engine?
There is a reason that the check engine light came on. The ECM (engine control module) detects a problem. You can clear the codes with a code scanner but if the problem hasn't been fixed the light will come back on. You need to have the codes read. The codes will help you determine the cause of the check engine light problem. It may be as simple as a loose fuel cap.
92 olds cutlass supreme you just had new coil packs plugs wires and complete exhaust now the check engine soon light comes on about once a week but goes off Does light need to be on to check the codes?
Disconnect one of the battery terminal wires and leave it disconnected for several minutes. This works to reset the check engine lite on my 2001 Prizm. If you haven't fixed the problem that caused the light to go on, though, the light may well go on again when you reconnect the battery and turn on the car. Also, after reconnecting the battery you'll need to reset the clock and your radio presets. If the light…
First you need to determine why the check engine light came on then make appropriate repairs before resetting the check engine light. Take a drive to your local auto parts store and have them check for codes. They will perform this service at no cost to you. Once you have the codes you or your mechanic can determine what the next step should be.