The accelerator pedal reports driver demand, while the controller determines how to operate the engine. A difference between pedal percentage and throttle percentage is not automatically a fault.
Interpreting the evidence
Use the vehicle’s expected operating strategy and compare the relevant signals under a defined condition. Include any torque limitation or protective mode shown by diagnostics. The assessment should explain why the response is abnormal for that condition rather than expecting identical percentages.
Keep this evidence
Send both parameter labels, the operating state and the complete fault record.
Do not defeat torque or safety controls to force a direct relationship between pedal movement and throttle movement.
Speak to AXION
For complex vehicle-electronics diagnostics, send your vehicle details and fault report. Workshop assessment is in Didcot, Oxfordshire. Suitable postal or remote work is confirmed before booking.
Technical background from HELLA. The referenced design explains the principle; the vehicle-specific procedure determines the repair.
Related reading — Throttle position feedback should be compared through its full permitted travel. Browse all vehicle-electronics diagnostic notes or return to the repair library.