P2122 Throttle Position Sensor D Circuit Low Input
Description and meaning of DTC p2122
This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. Although generic, the specific repair steps may vary depending on make/model. A P2122 code means that the the car's computer has detected that the TPS (throttleposition sensor) is reporting too low a voltage. On some vehicles that lowerlimit is 0. 17 - 0. 20 volts (V). The "D" refers to a particular circuit, sensor, or area of a particular circuit. Did you adjust it when you installed it? If the signal value is less than . 17Vthen the PCM sets this code. Could be an open or a short to ground in the signalcircuit. Or you may have lost the 5 Volt reference voltage.
p2122 diagnostic trouble code symptoms
Symptoms may include:Rough or low idleStallingSurgingNo/little accelerationother symptoms may also be present
DTC p2122 - possible causes
A code P2122 may mean that one or more of the following has happened:TPS not mounted securelyTPS circuit short to ground or another wireFaulty TPSDamaged computer (PCM)
How to fix OBD-II diagnostic trouble code p2122
Some recommended troubleshooting and repair steps are:Carefully check the throttle position sensor (TPS), wiring connector, andwiring for breaks, etc. Repair or replace as necessaryCheck the voltage at the TPS (refer to a service manual for your vehiclefor specific information). If the voltage is too low that is indicative ofa problem. Replace if necessary. If recently replaced the TPS may need to be adjusted. On some vehicles theinstallation instructions call for the TPS to be properly aligned or adjusted,consult a repair manual for specifics. If there are no symptoms at all, the problem may be intermittent and clearingthe code may resolve the issue temporarily. If this is the case then you shoulddefinitely check the wiring to be sure it's not rubbing on anything, grounding,etc. The code may come back.