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The light coming on indicates the your "on board diagnostics" determined there was a problem with the vehicle, there are numerous things that can make the light come on, you will have to take the vehicle to a place that has a scanner to pull the code. autozone will do this for free
It could be as simple as a loose gas cap. The best way to find out is to check the codes stored in the PCM. The code with give you an idea what is causing the problem. If you don't have a tester to read codes you'll have to go to a repair shop, the dealer or a part store like Autozone.
When "check engine" litgh tun on, the PCM (computer) is warning that some fault code is stored there. Autozone could scanned your PCM and show exactly what fault codes is there; if your O2 sensors was replaced, I assuming that they can see this codes... so, they reset and delete all codes stored there? Scanned the PCM after this change?
Some fault code is stored in the PCM (computer), generally could be some emissions code, but to know excalty what faulto code is, you need scanned the PCM. Some Autozone or Autoshop with scanner reader sometimes make this job for free.
FOR CODE P2106 (INTERNAL ENGINE OFF TIMER PERFORMANCE) THE FLOW CHART WILL LEAD YOU TO BELIEVE ITS THE PCM. THIS WILL PROBABLY NOT FIX IT. FIRST CHECK TO SEE IF NON FACTORY SPARK PLUGS HAVE BEEN INSTALLED. IF THEY HAVE THIS IS MOST LIKELY THE CAUSE.THEY WILL PRODUCE INTERFERENCE THRU THE COIL WIRING AND CAUSE THE PCM TO THINK THERE IS A PROBLEM. SIMPLY PUT FACTORY PLUGS BACK IN ENGINE AND CLEAR CODES.PROBLEM SHOULD BE GONE.I HAVE BEEN THRU THIS. SID CODESPOTI (SERVICE MANAGER)STOKES MAZDA, CHARLESTON,SC
Means your computer pick up a bad signal from one of your engine sensor's, most auto parts or autozone will pull code's for free, get back with us with the code number, and we'll help you diag. your trouble code,
The check engine light (yellow light) comes only when the computer control unit (called the PCM) senses a fault in the electronic controls of the engine and/or the emission system u will seldom feel the car engine run any different, there are about 200 possible faults that turn the light on, to know what has developed a problem you must have the system tested, this is called an OBD2 fault code test, Kragen and Autozone parts stores do this testing for free.
hello. When your check engine light is on it indicates that your car's computer has stored one or more error codes for you to see. If you have an AAMCO Transmission shop in the area they will scan your car's computer for free and tell you what is going on. Same true for the 4 wheel drive light. This is the important first step to solving your issues. Joe
Inspect / replace the idle sensor.
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Take your vehicle to AutoZone for a free "check engine light' analysis and ask for an explanation print-out. Have them reset the PCM (check engine light).
Let us know the code and summary of the print-out.