P0122 – Throttle/Pedal Position Sensor A Circuit Low

P0122 – Throttle/Pedal Position Sensor A Circuit Low
For Vehicles With An Idle Air Control (IAC) Valve
Description:                
The throttle position (TP) sensor circuit is monitored by the powertrain control module (PCM) for a high TP rotation angle (or voltage) input through the comprehensive component monitor (CCM). The test fails if the TP rotation angle (or voltage) changes above the maximum calibrated limit.
Possible Causes:       
 
TP sensor not seated correctly
 
TP circuit open to PCM
VREF open to TP sensor
 
TP circuit short to ground
Damaged TP sensor
Diagnostic Aids:          This concern exhibits a symptom of limited power. A TP PID reading less than 3.42% (0.17 volt) in ignition ON, engine OFF or ignition ON, engine running indicates a concern is present.
For All Others
Description:                
The electronic throttle control (ETC) throttle position (TP) sensor 1 circuit was flagged as a concern by the powertrain control module (PCM) indicating a low voltage or open circuit.
Possible Causes:       
 
Open ETC TP sensor harness
 
Short to ground in the ETC TP sensor harness
Damaged TP sensor
Diagnostic Aids:         
This concern exhibits a symptom of limited power. For Fiesta, a TP1 PID reading less than
0.04 volt in ignition ON, engine OFF or ignition ON, engine running indicates a concern is present. For all others, a TP1 PID reading less than 0.25 volt in ignition ON, engine OFF or ignition ON, engine running indicates a concern is present.
Related Topics  P011E - Engine Coolant Temperature 1/Ambient Air Temperature Correlation

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