Accelerator Pedal Fault Symptoms & Problems

The accelerator pedal is the right most pedal in the driver's foot well and is responsible for regulating the engine throttle control. The position of the pedal represents the 'openess' of the throttle, a fully raised pedal will be a closed throttle position whereas a fully depressed pedal will correspond to a wide open throttle position. The wider the throttle position the more air and fuel flow into the engine, the more air and fuel the more power and acceleration.

On older cars the accelerator pedal would have been connected to a cable that connects the pedal directly to the throttle body. Modern cars use a 'drive by wire' system that essentially transmits the pedal position as a digital signal to the ecu, the ecu then manages the throttle position. This allows for more safety systems to come into play as the ecu has ultimate control over the throttle rather than the driver.

Accelerator pedals can have problems mechanically and also with the sensor. There is added complexity for automatic cars as the pedal will also have a 'kick down' feature that tells the ecu to apply as much throttle as the engine can handle.
5 Symptoms of Accelerator Pedal Problems
We have 94 owner submitted problems mentioning the Accelerator Pedal

Showing the latest 10, see more problems here

Starting problems

takes 4 or 5 attempts to start once started loud knocking sound

2011 Ford S-Max 2.0tdci
Posted: Jan 7, 2021
Engine keeps cutting out each time I try to change gears e.g. drive forward or reverse.

Patrol found the following fault code/s:System : Engine control 1 - 5F8 / Motronic MEV 17.4 Status :P2134 - Accelerator ...

2007 Peugeot 207 207
Posted: Nov 29, 2020
Electrical problems

yesterday the airbag light turned on, and the heater fan will not start, the headlights will not switch to full and I ca...

2009 Ford Mondeo 2.0TDI
Posted: Nov 24, 2020
No dashboard indication and central locking not working

Central locking not working on the remote . No dashboard information at all and radio stays on when ignition is turned o...

2009 Ford Mondeo 1.6
Posted: Nov 11, 2020
Engine not starting correctly

when starting engine first time when the engine is cold the fast idle is not working/not coming on and engine will not r...

2000 Vauxhall Corsa 1.2 16 VALVE CORSA CLUB 3 DOOR.
Posted: Jul 11, 2020
Throttle not revving engine

2 issues... Van wouldn't start so disconnected the MAF sensor, van started but when we reconnected it the engine cut out...

2006 Vauxhall Combo 1.3 CDTI
Posted: Apr 30, 2020
Speed limited to 33mph

Whilst driving normally with no problems the car suddenly lost power and would not drive above about 33mph independent o...

2006 Mercedes Benz A Class 1.7 Avantgarde SE Manual 3Door
Posted: Jul 7, 2018

Engine cuts out when pressure released from the accellarator

2000 Mercedes Benz C Class 320c
Posted: May 2, 2018
EAC fail

Hi just wondering if you can help at all? I have a Ford Fiesta zetec 1.4 Petrol 52 reg. I broke down last week as I had ...

2002 Ford Fiesta Zetec 1.4 Petrol
Posted: Dec 13, 2017
Rattle noise

when depressing accelerator pedal there is a noise that sounds like a babies rattle, it happens periodically

2013 Citroen C3 1.2
Posted: Aug 7, 2017
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