Question about 2002 Toyota Camry
Was on a road trip and the engine light went on. Do you know why? or what to do?
Hey, It can be anything it is better if you can buy a OBD II scanner to see whats wrong better than sending it to body shop and pay for something that you can fix yourself.
Posted on Sep 07, 2008
Whenever the "Check Engine" light comes on, there is always a DTC (Diagnostic Trouble Code) stored in the ECM (Engine Control Module). You'll need an OBDII (On-Board-Diagnostics) scanner to retrieve any codes recorded/set in ECM. Once you do this and let us know what, if any codes are set, then we can go from there. You can purchase an OBDII scanner at most Automotive Retail stores (Car Quest, AutoZone, PepBoys, O'Riely's, NAPA, even Sears, K-Mart, WalMart, etc.) - prices differ depending on features of the scanner - shop around.
There are NUMEROUS systems monitored by the ECM and too little space here to list them all. Guess work is not my style - several systems can have intermittent problems and when the ECM doesn't detect it/them again, it will turn the Check Engine light OFF. For example, one of these is the Oxygen Sensors (O2snsr). When an O2 sensor starts to go bad (intermittent malfunction), the ECM will set the appropriate DTC... If it doesn't detect it again, let's say two key cycles later, it will turn the light 'OFF', but keep the DTC stored in the computer as a HISTORY code. It also keeps count as to the number of times the DTC was set.
Posted on Jun 20, 2009
SOURCE: Went on a road trip
You have to retrieve any code you may have,
anytime you have any OBD2 System Malfunction
Indicator lamps on
You could try an auto parts store in your travels
but they won't even know what the codes mean in
The codes don't tell you what is wrong or if anything
even need to be replaced
They are used to diagnose a system reporting an
out of range condition
Nothing gets replaced until properly tested.
Posted on Jun 12, 2011
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Posted on Jan 02, 2017
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