96 CORSICA SERVICE ENGINE SOON LIGHT ON, FAILED EMISSIONS. TOOK TO CHEV DEALER HAD WORK DONE. IE: REPLACED EGR VALVE, PCV VALVE, FUEL FILTER, TUNE UP, THERMOSTAT, PCV VALVE, OIL CHANGE DONE. COULD THEY HAVE FORGOTTEN TO RESET THE SERVICE ENGINE LIGHT? pd over 500.00 to do this work. Hmmm....
JUST A THOUGHT.
I took this to firestone. sounds like what I experienced and they took a quart container of some heavy duty cleaner, took the lid off quart container stuck a small hose and hooked it to the egr valve. started car let run and the suction from egr valve siphoned cleaner into egr and thoroughly cleaned passage ways eliminating chk engine light on.
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Samething happend on my 94. The dealer told me ther was a service bulliton. Never went to print Mechanic just have common knowledge of this problem. It is the CPU it may need resetting by the dealer they have he proper equipment to reflash it. If is faulty it can cause all kinds of weird stuff. From making your engine light go on or off to slow turn signals to making your engine stop at idle. But high engine temp is the most common due to the CPU. Have it checked out by the dealer . Don't spend your money on alot of bogus fixes. I am having it done again the CPU just does not hold the programing. I will never buy another Chev without reading there Service Bulletions first.
You need to have an OBII scan (fault scan) done by a dealer or a specialty shop. It'll pull up faults and point you at what needs to be addressed. Sometimes it's a loose connector or moisture intrusion. Other times it's a simple part replacement or "timed maintenance" IE: O2 sensors etc.. It's your onboard computer pre warning you of future possible problems.
If you paid the Dealer to find out what was wrong (why the light was on), he should have told you. If you paid the Dealer to fix the problem, you should not have the light on now. Either way, if he has your money, you should either know what needs fixing or what he fixed. Go back to the Dealer and get what you paid for.
If of course, you took your car in for a service and you haven't been charged anything extra, then chances are nothing has been done.
Most Dealerships are normally phoning customers back saying this needs doing or that needs doing, after you have taken the car in unaware that anything needed doing (mostly it doesn't either).
Even without mentioning a "Check Engine" or emissions warning light being on, this should have been picked by any self-respecting mechanic, and an assurance may have even been sought from you that were aware that they hadn't done anything to rectify it before you took the car.
Having said all that, the most common problems with emissions and/or check engine warning lamps being on (in general - not just Suzuki) would be from oxygen sensors and cat converter temp probe failures. These sensors sit quietly in the exhaust system baking away at 1000 degrees telling the ECM it's running too rich or lean (O2 sensor) or that the cat convertor is too hot (usually after its been running too lean!).
Go back to the Dealer and find out what has failed. Don't tell him to fix it (unless you've already paid) as some of these sensors can be many hundreds of dollars.
You should take the car and get the codes pulled (you can do this for free at autozone or advanced auto and they will tell you what the codes are and what they are for. Service engine lights are normally caused by emission related components...Oxygen sensor went bad, a cracked house and that sort of thing. Best to get the code and find out to be sure. On some vehicle it could be something as stupid as a bad gas cap (dodges are bad about this. Usually the only way to clear codes is by getting the auto parts store, or dealer to clear them. If on a budget you can disconnect the battery for 10 minutes, then reconnect it and it will clear the codes. If you haven't fixed whatever causes the Malfunction Indicator light (MIL) to come on it will eventually come back on.
You will need to have a reputable mechanic do a diagnostic check on the car to determine the problem. This should pull up a code number in your car's computer and help point the mechanic and you in the direction of the malfunctioning part/s.
Just today, I had a diagnostic check done on mine for nearly $45.00. The mechanic was able to figure out the reason why my service engine light was staying on. I knew my car's radiator fans failed to run when car's engine was hot except when the A/C was running. I had changed out the sensors and was never able to get the light to go out or get the fans working. They were able to determine that the 25 amp fuse for the fans located under the hood was blown. After replacing it, the fans worked as they should, my car runs cooler and the engine service engine light is now out. Of course there are many possible reasons why the service engine light may come on including problems with the car's emissions. A reputable mechanic can solve your problem.
I can tell you for sure that all US models of the Ford Ranger came with a emission system that incorporated a MIL or check eng light, go to the dealer and have them run your VIN on the Ford on line information service, that will give you the engine Calibration of the emission system, you can then find out what emission system was used, export or US.