Description
Description
This Bosch throttle valve is designed for PSA 2.0 and 2.2 HDi diesel engines used in Citroën and Peugeot vehicles. Supplied under OEM numbers 9638246280, 0928400430 and 0345A3, the unit regulates airflow through the intake tract to support proper engine management, idle control and driveability. It is a common spare part sought by mechanics and experienced DIYers, often located by product number.
Why This Part Matters
The throttle valve controls the volume of air entering the engine at low loads and during idle, helping the engine control unit (ECU) maintain correct air/fuel balance and stable idle. On HDi engines it plays a key role in throttle response and can indirectly affect fuel consumption and emissions. Replacing a faulty valve typically restores smooth idle, removes throttle hesitation and clears related fault codes.
Common Symptoms and Causes
Typical symptoms of a failing throttle valve include rough or unstable idle, reduced throttle response, engine warning light, and occasionally increased smoke or poor fuel economy. Failures are most commonly caused by carbon and soot build-up on the flap and housing, electrical connector faults, or mechanical wear of the moving parts. Environmental contamination and prolonged operation without cleaning accelerate wear.
Replacement And Workshop Notes
Fitting the throttle valve is a straightforward job for a trained mechanic and achievable by experienced DIYers with basic tools. Typical replacement steps:
- Disconnect the battery for safety.
- Remove the intake ducting to access the throttle valve.
- Unplug the electrical connector and any vacuum hoses.
- Unbolt the throttle valve from the intake manifold, taking care to retain gaskets.
- Fit the new valve with a new gasket, tighten to the manufacturer's torque values and reconnect electrical and vacuum lines.
- Reconnect the battery and clear fault codes from the ECU. Perform an idle relearn or follow manufacturer-specific initialization if required.
Labour time varies by model and workshop, typically 0.5–1.5 hours. Always use correct torque settings and replace seals or gaskets when refitting to prevent air leaks.
Maintenance Tips
Inspect the throttle valve during regular servicing, especially on high-mileage diesel cars. Cleaning carbon deposits can prolong life, but heavily worn or electrically faulty units should be replaced. Address vacuum leaks and intake contamination sources to prevent premature failure.
Technical Information
- Manufacturer: Bosch
- Model: Citroén, Peugeot – 2.0 HDi, 2.2 HDi
- Product Codes: 9638246280, 0928400430, 0345A3
- Additional Numbers: 0345A3, 928400430
If you locate this part by its product number, confirm fitment against the vehicle VIN or engine code before installation. For professional diagnostics and final configuration follow the vehicle manufacturer's service instructions.
