1. Faulty Coolant Temperature Sensor: The coolant temperature sensor provides information about the engine's temperature to the engine control unit (ECU). If this sensor is faulty or not functioning correctly, the ECU may receive inaccurate temperature readings and affect fuel injection and ignition timing, leading to difficulty starting when the engine is warm.
2. Fuel System Issues: Fuel-related problems can also cause starting issues when the engine is warm. Check for any fuel leaks, clogs, or restrictions in the fuel lines, fuel filter, or fuel injector. A faulty fuel pump or fuel pressure regulator could also be the culprit.
3. Electrical Problems: Electrical issues, such as loose or corroded wiring connections, a failing battery, or a faulty starter motor, can prevent the engine from cranking or starting properly. Check all electrical connections and components related to the starting system.
4. Faulty Glow Plugs: Peugeot Expert 2.0 HDi engines are equipped with glow plugs to aid in cold starts. If these glow plugs are worn out or not functioning correctly, they may not provide sufficient heat for the engine to start smoothly when it's warm.
5. Engine Mechanical Issues: In some cases, mechanical problems within the engine itself can cause difficulty starting when the engine is warm. This could include issues with compression, valve timing, or cylinder head gasket failure.
It's important to have the exact cause diagnosed by a qualified mechanic or auto technician to ensure proper repairs are made. They can perform tests and inspections to identify the specific problem and recommend the appropriate solution.
