Fault code lookup

PowertrainP2122

Caution

Severity: Caution - get it checked when you can

Throttle/Pedal Position Sensor/Switch D Circuit Low

42 brands affected · Generic SAE J2012 description.

Key terms: Control module: a small computer that runs one part of the car · SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions

1What it means in plain English

The engine or powertrain control system has stored a fault that does not have specific guidance in this database yet.

2Common causes

  1. Sensor or actuator fault
  2. Wiring or connector fault
  3. Vacuum or intake leak
  4. Fuel or ignition problem
  5. Control module fault

3Can I drive?

Caution · drive with care

Have it diagnosed promptly. If the car runs and drives normally, drive gently to a workshop. If it runs badly, stalls, overheats, loses oil pressure, or a warning light is flashing or red, stop safely and get professional help. If the code concerns the brakes, brake vacuum or brake assist, do not drive until it is checked: a hard pedal or longer stopping distance means stop.

This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.

4Brand data 42

BrandCodeDescriptionSystem
Ashok Leyland CVP2122Throttle/Pedal Position Sensor/Switch D Circuit Low SAEPowertrain
BAIC MotorP2122PPS1 signal circuit open or short to low voltage BrandPowertrain
Mercedes-BenzP2122Throttle/Pedal Position Sensor/Switch D Circuit Low SAEPowertrain
BMWP2122Short circuit to negative or open circuit BrandPowertrain
BYDP2122APP sensor(main) low BrandPowertrain
CheryP2122APP sensor(main) low BrandPowertrain
DaewooP2122Accelerator Pedal Position Sensor 1 Low Input BrandPowertrain
DaihatsuP2122Accelerator Sensor No.1 Open Circuit BrandPowertrain
DFFSP2122Accelerator pedal sensor 1 voltage low BrandPowertrain
DFFXP2122APP sensor(main) low BrandPowertrain
DFXKP2122Throttle/Pedal Position Sensor/Switch D Circuit Low BrandPowertrain
EOBDP2122Gas-/pedalpositionsensor/brytare 'D'-krets låg BrandPowertrain
FordP2122Throttle/Pedal Position Sensor/Switch D Circuit Low SAEPowertrain
GeelyP2122APP sensor(main) low BrandPowertrain
GMP2122Throttle/Pedal Position Sensor/Switch D Circuit Low BrandPowertrain
Great WallP2122APP sensor(main) low BrandPowertrain
HafeiP2122APP sensor(main) low BrandPowertrain
HoldenP2122Throttle Position Sensor 2 Circuit Low Voltage BrandPowertrain
HondaP2122AP1 Sensor Voltage Low BrandPowertrain
HyundaiP2122Throttle/Pedal Position Sensor/Switch D Circuit Low SAEPowertrain
IsuzuP2122Throttle/Pedal Position Sensor/Switch D Circuit Low SAEPowertrain
Land RoverP2122Pedal position sensor 1 - Circuit low input BrandPowertrain
MahindraP2122Throttle/Pedal Position Sensor/Switch D Circuit Low SAEPowertrain
MaseratiP2122Accelerator Pedal Position (APP) sensor 1 circuit low BrandPowertrain
MazdaP2122Throttle/Pedal Position Sensor/Switch D Circuit Low SAEPowertrain
MitsubishiP2122APS(sub) low BrandPowertrain
NissanP2122Throttle/Pedal Position Sensor/Switch D Circuit Low SAEPowertrain
OpelP2122Throttle/Pedal Position Sensor/Switch D Circuit Low BrandPowertrain
PeroduaP2122Accelerator Sensor No.1 Open Circuit BrandPowertrain
PeugeotP2122Throttle/Pedal Position Sensor/Switch D Circuit Low SAEPowertrain
PorscheP2122Throttle/Pedal Position Sensor/Switch D Circuit Low SAEPowertrain
ProtonP2122APS(sub) low BrandPowertrain
SaabP2122Throttle/Pedal Position Sensor/Switch D Circuit Low BrandPowertrain
MG (SAIC)P2122Throttle/Pedal Position Sensor/Switch D Circuit Low BrandPowertrain
SmartP2122Throttle/Pedal Position Sensor/Switch D Circuit Low SAEPowertrain
SprinterP2122Throttle/Pedal Position Sensor/Switch D Circuit Low SAEPowertrain
SubaruP2122Accelerator Position Sensor D Low Input BrandPowertrain
SuzukiP2122Throttle/pedal position sensor/switch 'D' (main) circuit low input BrandPowertrain
SWM MotorP2122PPS1 signal short circuit to low voltage BrandPowertrain
TataP2122Accelerator Pedal Position Sensor D Low BrandPowertrain
ToyotaP2122Electronic accelerator pedal position sensor 1 circuit voltage low BrandPowertrain
VolkswagenP2122Accelerator position sensor (G79): signal too low; Short to plus BrandPowertrain

Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.

5Extended variant codes 5

These 7-character codes are manufacturer-specific variants of P2122 and may be reported by some scan tools.

BrandCodeDescriptionSystem
Mercedes-BenzP212200Der Positionssensor 1 des Fahrpedals hat Kurzschluss nach Masse. BrandPowertrain
HyundaiP212200Short to Ground or open in pedal sensor is detected, PCM sets DTC BrandPowertrain
SsangYongP212200Throttle/Pedal position sensor/switch 'D' circuit low input BrandPowertrain
Mercedes-BenzP212214Der Positionssensor 1 des Fahrpedals hat Kurzschluss nach Masse.Es liegt ein Kurzschluss nach Masse oder eine Unterbrechung vor. BrandPowertrain
Mercedes-BenzP212241Der Positionssensor 1 des Fahrpedals hat Kurzschluss nach Masse. Es liegt ein allgemeiner Prüfsummenfehler vor. BrandPowertrain

6Related codes

  • P2120 Pedal-travel sensor double fault
  • P2121 Throttle/Pedal Position Sensor/Switch D Circuit Range/Performance
  • P2123 Short circuit to positive
  • P2124 Throttle/Pedal Position Sensor/Switch D Circuit Intermittent
  • P2125 Electronic throttle position sensor signal failure
  • P2126 Throttle/Pedal Position Sensor/Switch E Circuit Range/Performance
  • P2127 Short circuit to negative or open circuit
  • P2128 Short circuit to positive
  • P2129 Throttle/Pedal Position Sensor/Switch E Circuit Intermittent
  • P212A Throttle position sensor/switch 'G' circuit
  • P212B Throttle position sensor/switch 'G' circuit range/performance
  • P212C Throttle position sensor/switch 'G' circuit low

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