Description
Throttle potentiometer for Citroën and Peugeot vehicles. Suitable for 1.6, 2.0 and 2.2 HDi engines.
Product Overview
This throttle potentiometer (accelerator pedal position sensor) is a direct-fit electrical component used on a range of Citroën and Peugeot HDi engines. It converts the driver’s pedal movement into an electrical signal for the engine control unit, ensuring accurate throttle response, smooth idling and correct fuel/air regulation under all driving conditions. Supplied with OE cross-reference numbers commonly used by mechanics when searching parts.
Technical Information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: Citroën Berlingo, C5, C8, Xsara, Xsara Picasso; Peugeot 307, 406, 807, Partner — Engines: 1.6, 2.0, 2.2 HDi
- Product Codes: 9639779180, 1920X1, 1920AK
- Additional Numbers: 9643365680, 445821001002, 19209W
Compatibility
Fits multiple Citroën and Peugeot models with HDi diesel engines (1.6 / 2.0 / 2.2). Always match the part numbers listed above with the old component to ensure correct fitment. This part is frequently referenced by its OE numbers during searches and sourcing.
Function and Common Symptoms
The throttle potentiometer measures accelerator pedal position and sends a variable voltage signal to the engine ECU. When functioning correctly it provides precise throttle mapping and stable idle. Common failure symptoms include:
- Unstable or high idle.
- Delayed or erratic throttle response and hesitation under acceleration.
- Engine enters limp-home mode or reduced power mode.
- Intermittent stalling or surging at low speeds.
- Illuminated Check Engine light and stored throttle/pedal fault codes.
Why It Fails
Throttle potentiometers are subject to electrical wear and environmental stress. Typical causes of failure are gradual degradation of the internal resistive track, contamination from dust or moisture, connector corrosion, or mechanical wear in the pedal assembly. Failures are more likely after high mileage, exposure to moisture, or if the vehicle is used in harsh conditions.
Replacement Procedure
- Park the vehicle on level ground, engage parking brake and switch off the ignition.
- Disconnect the negative battery terminal before starting work to prevent electrical damage.
- Remove interior trim panels around the pedal box to access the sensor.
- Unplug the electrical connector and remove the mounting fasteners securing the potentiometer to the pedal assembly.
- Fit the new potentiometer, secure fasteners to the original positions and reconnect the electrical plug.
- Reconnect the battery and clear any stored faults with a diagnostic tool.
- Perform throttle/pedal adaptation or relearn procedure using appropriate diagnostic equipment to ensure correct idle and pedal mapping.
Installation Recommendations
- Always disconnect the battery before removal/installation to avoid damage to the sensor or ECU.
- Inspect and clean the connector and wiring harness; repair any corroded pins or damaged insulation prior to fitting the new part.
- Use diagnostic equipment to clear codes and run the pedal/throttle adaptation routine after replacement—this ensures smooth operation and prevents limp mode.
- Avoid forcing connectors; ensure correct pin alignment when mating plugs.
- If you encounter persistent faults after replacement, re-check wiring and ground points; intermittent wiring faults can mimic sensor failure.
Note for Mechanics and DIYers
Part numbers are commonly used when sourcing this component—enter the OE codes listed above for the highest chance of an exact match. This sensor is a standard replacement item for HDi engines listed and is suitable for both workshop technicians and experienced DIYers familiar with pedal access and basic diagnostic procedures.
