There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
By bringing it to a trained mechanic so they can check the engine is running properly (which if the light is on it's probably not)
have vehicle scanned to determine problem
Have vehicle scanned to determine the problem
You either need a scan tool, or unhook the battery for a minute.
If the 1993 Mercury Villager runs rough when the check engine light comes on and the code reader says 34 and 51, there is a problem with an oxygen sensor and the MAP (Manifold Absolute Pressure) sensor. Both parts together will cost around $200.
There are many, many things that can cause the MIL to light up. You will need to have the problem diagnosed by first reading the codes and going from there.
With an OBD2 scanner.
take it to auto zone and ask them to check and then clear the codes or remove the positive battery cable and press the brake pedal for 30 seconds.
IF the computer was really defective, either the car would not run, or there would be a check engine light due to a fault code.
If the o2 sensor is bad, replace it. If the sensors are activating the check engine light, then the codes should be checked. The catalytic converter could be blocked or the engine may not be running properly.
If you have a bad injector, chances are that you will also have a dead cylinder. Auto zone can check that for free if your engine light is on!Good luck!
If your check engine light is flashing , an engine cylinder misfire has been detected
my check engine light stays on and the o/d light blinks....what could this mean?
Check and fix the engine.
Either have the problem that is causing the light to illuminate fixed or disconnect and reconnect your battery.
Inside the engine compartment by the passenger strut tower
It's probably misfiring. You would need to diagnose why.
None. Engine timing is set by the PCM, you can not change it with a timing light.
The OBD-1 diagnostic connector is located on the back of the block beside the starter. A series of jumper wire locations are used in conjunction with watching the CHECK ENGINE light.
On a 1997 Mercury Mountaineer : The " CHECK ENGINE " warning light is just to the left of the battery voltage gauge
Your owner's manual will list this. If you do not have one then change them at the first sign of the engine running badly, check engine light on, fuel mileage dropping, or at 100,000 miles, whichever comes first.
The check engine light comes on and stays on when a problem is detected by the self diagnosis system of your vehicle. Generally, a check engine light is lit when there is a problem in the emissions or somthing that is affecting the effectiveness of the emissions. If the check engine light is flashing a misfire has been detected
You don't. Unhook the battery for a minute. That will reset it.