Throttle and accelerator pedal
The throttle body, its actuator and the accelerator pedal. There is no cable from pedal to throttle on a modern car: the pedal is a pair of sensors, and a motor opens the flap on the unit's command. If the sensors disagree, the unit refuses to open the throttle.
15 codes in this section, 15 with a guide
What it usually turns out to be
- A car that will not pass two thousand rpm is in protection, not broken.
- The pedal connector lives under the driver's mat and suffers from water and shoes.
- A sticking flap is almost always carbon on its edge rather than a dead motor.
P0121Throttle position sensor A circuit range/performanceguideP0122Throttle position sensor A circuit low inputguideP0123Throttle position sensor A circuit high inputguideP2100Throttle actuator — circuit openguideP2101Throttle actuator — range or performance faultguideP2102Throttle actuator — circuit lowguideP2103Throttle actuator — circuit highguideP2110Throttle actuator — forced limited RPMguideP2119Throttle body — sticking, position mismatchguideP2122Accelerator pedal sensor D — low signalguideP2123Accelerator pedal sensor D — high signalguideP2127Accelerator pedal sensor E — low signalguideP2128Accelerator pedal sensor E — high signalguideP2135Throttle position sensors A and B — correlation faultguideP2138Accelerator pedal sensors D and E — correlation faultguide
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Other sections
Fuel and air metering, general 33Intake measuring sensors 17Oxygen sensors 19Mixture: lean and rich 11Fuel and air metering: injectors 25Ignition system and misfires 29Exhaust gas recirculation (EGR) 7Secondary air injection 3Catalytic converter 4Canister and purge valves 9Fuel vapour leaks 7Fuel level in the tank 4Diesel particulate filter 6Idle and auxiliary systems 22Control module and its circuits 21Transmission 17Communication between modules 20Brakes, ABS and stability control 17Body, airbags and lighting 12