DTC Code P0121 Low Voltage TPS
DTC Code P0121 Low Voltage TPS When this happens, does the sensor need to be replaced? I have noticed when it does come on the car tends to shift funny at WOT. If I clear the code then it will be fine.
I also recently installed a NOS WOT/RPM window switch and it has a wire to splice into my TPS. So I tapped into the 24 dark blue wire on the red side PCM and when I did that, it will only read around 2.8 Volts max when I stomp on the pedal.
I removed the sensor and it kinda looks fairly new, not dirty or anything. Could it be in the tune? A new sensor to be safe? Any help would be appreciated. Thanks!
I also recently installed a NOS WOT/RPM window switch and it has a wire to splice into my TPS. So I tapped into the 24 dark blue wire on the red side PCM and when I did that, it will only read around 2.8 Volts max when I stomp on the pedal.
I removed the sensor and it kinda looks fairly new, not dirty or anything. Could it be in the tune? A new sensor to be safe? Any help would be appreciated. Thanks!
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Joined: Aug 2010
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From: Ann Arbor, MI
A high impedance circuit (like a volt meter) can read the TPS value, but anything that drains more than a few hundred MICRO-amps of current from it will reduce the voltage.
Disconnect the splice and check the voltage - if it still doesn't range from about 0.5V to 5V, then you likely have a sensor problem.
