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TPS issue?

1sttimeSS

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Hi guys. I was wondering if my VY SS might have a TPS problem. It doesn't respond sometimes to throttle inputs, especially regards auto kickdown...it doesn't kick down without a BIG stab on the gas pedal. It's done 110,000Km's and is stock except a Cat back exhaust.

What's involved with chaging it over?

Any advise would be a help.
 

Craigo8

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View attachment 159469View attachment 159469Hey Mate,
I know if the TPS is having issues it will illuminate "check powertrain "light on dash.The DTC codes for the TPS are as follows
P0121 insufficient activity
P0122 low voltage
P0123 high voltage
The following 2 won't throw up the powertrain lightView attachment 159469View attachment 159469

P1121 intermittent high voltage
P1122 intermittent low voltage


Get a scan tool on it to make sure but if any of these codes are present you have a TPS issue.The scan will reveal any other DTCs that may be causing your problem.TPS sits at front of engine near the power steering resevoir just below throttle body.Not hard to replace.Sorry about upside down image bloody I Pads.
Hope this helps
 

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franklinfrog

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Courtesy SavVYute:

A throttle position sensor works as a potentiometer, sending variable voltage signals to a car's main computer to let it know how far the throttle plates have opened. The engine then uses this data to calculate the proper mix of air to fuel the car's needs at that moment for optimal performance. The sensor feeds a low-level signal--typically less than one volt--to indicate a fully closed throttle, adding voltage gradually as the throttle opens and sending a full five volts when the throttle opens completely.

A car that seems to hesitate or stumble during acceleration may have a faulty throttle position sensor. If the sensor sends the wrong throttle position message to the engine, the engine will not add extra fuel to the mixture until the oxygen sensor feedback circuit steps in to correct the imbalance. This momentary miscommunication will cause the car to hesitate. Sometimes a sensor may develop one or more dead spots in its response, so as the potentiometer passes those spots, the car hesitates. Sensor wear often causes a dead spot just above its normal "idling" position.



They're cheap as to replace around $30-$40, unbolt old, bolt on new. It's on your throttle body. Search ebay for a photo of it and maybe order one while you're there......
 
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