Accelerator Pedal Problems & Common Fault Symptoms

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
The Latest Owner Problems

We have 90 owner submitted problems mentioning the Accelerator Pedal - see more problems .

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
Poor acceleration

When I accelerate from standstill the engine gets to about 1500rpm then reverts back to idle, pressing the accelerator ...

2005 Ford Galaxy 1.9tdi
Posted: Jun 22, 2017
Engine rough idling

Start easily, idle rough for some seconds then engine cut of

2011 Nissan Wingroad
Posted: Mar 8, 2017

Hi I have six codes come up which I would like to know how to solve if possible numbers are 112206,15503a,161450,161600,...

2006 Vauxhall Astra 1.8
Posted: Feb 27, 2017
Intermittent rapid rise in engine speed

This has so far only occurred while the weather was cold, around 2 celsius, though that could be red herring. While acce...

2015 Seat Leon 1.4 ACT FR
Posted: Nov 8, 2016
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