THROTTLE POSITION SENSOR

2000 GMC Jimmy

Tiny

scooter7205

June, 3, 2009 AT 6:14 AM

Electrical problem
2000 GMC Jimmy 6 cyl Four Wheel Drive Automatic 74,000 miles

replaced throttle position sensor and my check engine light comes on goes off, comes on goes off

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3 Answers

Tiny

Jack42

June, 3, 2009 AT 7:44 AM

What code is in the PCM? You need to have it scanned to see where to start

Tiny

scooter7205

June, 3, 2009 AT 7:47 AM

Ihave had the vehicle scanned a couple of times and it comes up code 121 which I was told was the tps sensor in which I just replaced.

Tiny

Jack42

June, 3, 2009 AT 9:55 AM

At minimum you will need a meter to diagnose this or a scan tool. One of the threee wires is a 5 volt reference. One of theother wires should have around.5 volts at idle and it should increase to 5 volts at full throttle. If the minumum idle (idle screw) has been adjusted ori f it is having idling issues (IAC- Idle Air Control) it can also set a TPS code

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