Have u ck for codes,had a 99 monte canister in drives rear quarter panel was bad evap cat & emission code,,ck it out,advance auto or autozone scans for free,,codes that is,,
SOURCE: my Check Engine Light keeps coming on
check your MAF sensor, if it's dirty clean it then reset your check engine light again. this should work.
SOURCE: 1999 Chevrolet S-10 Check Engine Light
YEAH MAN I KNOW WHAT YOU ME, THOSE DARN COMPUTER ARE WAY TO SMART.. THERES NOTHING WRONG, BUT YOU CAN TAKE THE TRUCK TO A GM DEALER AND THEY CAN FLASH THE COMPTUER, BUT THE ONLY DOWNFALL IS THAT THE CHECK ENGINE LIGHT WILL NEVER WORK AGAIN.. SO ITS YOUR CALL..GOOD LUCK KEITH..
SOURCE: Does my car need a tune up and oxygen sensors replaced after the catalyic converter is changed?
No,Although a tune up should have been done,This would not clog a new convertor,If in fact the new one is clogged,You have a deeper under lying problem and I would recomend you take it some where else for a second opinion,without telling them what the first place said.That way,They test the vehicle completely.
If you tell them what the first place said,they are more likely to agree than to test for something else.
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SOURCE: Oxygen sensor replacement
It's something you can with simple tools, you have four O2 sensors. Your going to have to get the truck rescanned or if you have the DTC code, you can find out which O2 sensor has gone bad so you can replace it. Your going to have Two upstream O2 sensors on each exhaust bank, one O2 sensor before the Catalytic Converter, and the last one after the Catalytic Converter. Its like replacing a Spark plug and you can pick up the O2 sensor at any large Auto Parts store with a can of WD 40. Just unclip the wire leads to the O2 sensor and then with a O2 sensor socket or hint close end wrench and hammer, you can remove the O2 sensor from the exhaust pipe. Good luck and be safe.
SOURCE: check engine light on because of oxygen sensor on
Before to change other sensor or parts, I suggest scanned the PCM (Powertrain Control Module) to know
exactly what fault code is stored there ans causing engine light turn
on. With this code number we could send other details.
Some Autozone or Autoshop with OBD scanner readers make this job for free.
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and I'll appreciate your time and consideration if you leave some
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