P2122: Throttle/Pedal Position Sensor 'D' Low Input
Understanding this critical engine code, its causes, symptoms, and repair.
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- What the code means: The Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected a voltage input from the Throttle/Pedal Position Sensor "D" that is lower than expected.
- Severity: Get towed immediately. This is a severe issue that can lead to unpredictable throttle response or no throttle response at all, making the vehicle unsafe to drive.
- Most common cause: A faulty throttle position sensor or accelerator pedal position sensor.
What the P2122 Code Means
The P2122 diagnostic trouble code (DTC) officially stands for "Throttle/Pedal Position Sensor/Switch
Related P-series codes
P0010
'A' Camshaft Position Actuator Circuit (Bank 1)
P0011
'A' Camshaft Position - Timing Over-Advanced (Bank 1)
P0014
'B' Camshaft Position - Timing Over-Advanced (Bank 1)
P0016
Crankshaft/Camshaft Position Correlation (Bank 1 Sensor A)
P0017
Crankshaft/Camshaft Position Correlation (Bank 1 Sensor B)
P0020
'A' Camshaft Position Actuator Circuit (Bank 2)
P0030
HO2S Heater Control Circuit (Bank 1 Sensor 1)
P0036
HO2S Heater Control Circuit (Bank 1 Sensor 2)
Parts, tools, and pros for this code
Parts pros use for this job
- •Oxygen sensor
- •Spark plugs
- •MAF sensor
Tools pros use
- •OBD-II scanner
- •Code reader
- •Smoke leak tester
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