Question about 2003 GMC Yukon

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Check engine light, low engine power, hand held dinog at autozone all 4 readings led to TPS. Replace throttlebody and still same reading.

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Auto zone is no good for diagnosis of anything. I would take it to a qualified repair shop or the dealer, wiring harnesses are a common issue with these. You dont say but I ASSUME you dont have a throttle cable.

Posted on Aug 31, 2010

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Codes 32 75 12 22 on a check engine light


first code it's P0320 Possible causes
- Faulty Ignition/Distributor engine speed sensor
- Faulty Crankshaft Position sensor
- Ignition/Distributor engine speed sensor harness is open or shorted
- Ignition/Distributor engine speed sensor circuit poor electrical connection
- Low battery charge
- Faulty Engine Control Module (ECM)


Read more: http://engine-codes.com/p0320_ford.html#ixzz3DcwddSlp
2- P0750 Possible causes
- Low transmission fluid level
- Dirty transmission fluid
- Faulty shift solenoid 1 valve
- Shift solenoid 1 valve harness or connectors
- Shift solenoid 1 valve circuit is open or shorted


Read more: http://engine-codes.com/p0750_ford.html#ixzz3DcwoXS73
3- P0120 Possible causes
- Faulty Throttle Position Sensor
- Throttle Position Sensor circuit is open or shorted
- Throttle Position Sensor poor electrical connection


Read more: http://engine-codes.com/p0120.html#ixzz3Dcx3VCPs
4- P0220 Possible causes
- Throttle Position Sensor (TPS) harness is open or shorted
- Throttle Position Sensor (TPS) circuit poor electrical connection
- Faulty Throttle Position Sensor (TPS)
- Fault Electric Throttle Control Actuator (or Throttle Body Motor)
- Accelerator Pedal Position Sensor (APP)


Read more: http://engine-codes.com/p0220.html#ixzz3DcxGUMl4

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1 Answer

Check engine light on need to tighten gas cap


Take your car to a place like Autozone or parts store that will do a Free hand held diagnostic check for you, read the code and print out what it means, I am not sure what you mean by tighten gas cap, some cars check engine lights will come on for gas cap pressure, maybe you need a new one? thanks and take care.

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1 Answer

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First, take it to Autozone or any of the parts stores that do a free check with their hand held analyzer. They can read the code for you and give you a printout of what it means. take care and good luck

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1 Answer

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Engine light flashes at the stop light. engine starts to flutter. then when I take off the engine falls flat on it face then after about 30 yards the engine picks back up and I am at full power then the...


Try to get it to a large auto parts place like Autozone etc. they will do a Free test with their hand held analyzer and read the light code, print it out with what the code means. Free and easy.

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1 Answer

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When the light comes on, take it to a large auto parts like Autozone etc. These guys will hook up their hand held analyzer and read a code, then do a printout with what it means. Easy to do and it is free.

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You may have too much back pressure or a blockage in the exhaust system. Have your convertor checked especially if over 100,000 kms, 60,000 miles. Good luck!

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