Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is having trouble controlling the engine's idle speed on one side of the engine. It's like when you try to keep a toy spinning at the same speed, but it keeps slowing down or speeding up by itself.
The engine control module (ECM) is detecting an incorrect signal from the idle speed control valve on bank 2, which affects the ability to maintain a steady idle speed.
P153D indicates that the ECM has identified an issue with the idle speed control valve on bank 2 of the engine. The valve is not providing the expected feedback to the ECM, which may result in unstable idle speeds.
• Unstable or fluctuating idle speed
• Engine stalling at idle
• Check Engine Light illuminated
• Faulty idle speed control valve
• Wiring issues or poor electrical connections
• ECM malfunction
ECM: Engine Control Module, the computer that controls engine functions.
Idle Speed Control Valve: A component that regulates the engine's idle speed.
• Use an OBD-II scanner to confirm the code.
• Inspect the idle speed control valve for damage or wear.
• Check the wiring and connections to the valve.
• Replace the idle speed control valve if faulty.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• BMW 5 Series
• Mercedes-Benz E-Class
• Audi A6
• Regular maintenance and cleaning of the idle speed control valve.
• Ensure all electrical connections are secure.
• Routine ECM updates and checks.
Engine Performance
• Avoid driving the vehicle with a fluctuating idle speed as it may stall.
• Get the vehicle inspected by a professional mechanic.
Check with the vehicle manufacturer for warranty coverage on engine control components.
This code has been associated with vehicles that have complex engine management systems, particularly in European models.
Moderate – Should be addressed soon to avoid potential stalling.
Operating a vehicle with this issue may lead to unsafe driving conditions. Ensure repairs are conducted by a certified professional.
• Engine at operating temperature
• Vehicle in idle
The idle speed control valve is typically located on the throttle body of the engine.
Q: Can I drive with code P153D?
A: It's not recommended to drive with this code, as it may cause the engine to stall unexpectedly.
Q: How do I reset the Check Engine Light after fixing P153D?
A: Use an OBD-II scanner to clear the code after repairs are completed.
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