Basically it means that you have experienced an intermittent emission control system failure. It failed to work properly for some time, then it began working again. Explanations range from a temporary issue caused by wet or dirty wiring harness plugs that may never give you a problem again, to a component that is slowly failing and will definitely have to be replaced, eventually.
For an explanation of how this can happen, see below:
The check engine light illuminates when an emission control device has failed a computerized self test. Such tests vary by year and by car, but they are basic operational tests that occur all the time your vehicle is in operation.
During vehicle operation, the ECM (electronic control module) reads a series of sensors (temperature, pressure, flow, position, etc) and controls a series of effectors (valves, switches, solenoids, etc). If the ECM turns on a solenoid to effect a change in exhaust gas recirculation, it will watch the exhaust gas recirculation flow sensor to see if the change actually created more or less flow. If it does not, it may reset the solenoid and try it several more times. But eventually, if the effector (switch, solenoid) does not cause a change in the reading of a sensor, the ECM will mark the circuit as defective, set a service code(s), and illuminate the check engine light.
Additionally, the ECM will occasionally retest any circuit marked defective. If that circuit works properly during the restes, it will mark the circuit as good and turn off the check engine light. These retests occur when you first start your engine, but may also happen while you are driving. The newer the vehicle, the more sophisticated and smarter the ECM is.
It is possible to repair the 1992 deville check engine light if it is malfunctioning.
You either take it to AutoZone and they will tell you why your check engine light came on in the first place so you can fix it. Or you go to AutoZone (or another place like it) and you buy the repair manual.
get the alarm code and repair the problem, as much as we dislike the light it's our friend
Take it to repair.
You will have to get the engine scanned and the necessary repairs made. Then the check engine light can be cleared. Just to clear the light without the repair will result in the light comming back "on."
sometimes after making a repair or replacement, the computer needs to be reset by a mechanic
The CE light should come on when you turn on the ignition without trying to start the engine. If it does not, then more than likely the bulb is burned out or is disconnected.
Yo can not "change" an engine code. You need to repair what is causing the code.Yo can not "change" an engine code. You need to repair what is causing the code.
autozone.com is a great sight for repair guides and online manuals.
Yes, P0700 is a code in the engine computer that tells you to check the trans computer for codes. You check those codes and repair them and P0700 will go away.Yes, P0700 is a code in the engine computer that tells you to check the trans computer for codes. You check those codes and repair them and P0700 will go away.
Take it to repair. Codes can be checked by anyone with a scanner, some places do that for free.
After the Explorer is scanned for trouble codes to diagnose and then repair the malfunction , then the check engine light can be reset