Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer noticed a problem with the part that controls how fast the engine idles. It found that the engine speed it wanted doesn't match what it's getting.
The engine control module (ECM) monitors the idle speed control valve to ensure the engine idles at the correct speed. If the desired idle speed and the actual speed differ significantly, this code is triggered.
P153C indicates that the ECM has detected a discrepancy between the desired and actual idle speed values for Bank 2. This could be due to a malfunction in the idle speed control valve or related components.
• Erratic idle speed
• Engine stalling
• Check Engine Light illuminated
• Faulty idle speed control valve
• Vacuum leak
• Wiring issues or poor electrical connections
ECM: Engine Control Module
Idle Speed Control Valve: A device that regulates the engine's idle speed
• Use an OBD-II scanner to verify the code.
• Inspect the idle speed control valve for damage or wear.
• Check for vacuum leaks around the intake manifold.
• Replace the idle speed control valve if faulty.
• Repair any vacuum leaks.
• Fix any wiring issues or poor connections.
• OBD-II scanner
• Multimeter
• Vacuum gauge
$150 - $400
Moderate
• BMW 3 Series
• Mercedes-Benz C-Class
• Audi A4
• Regular maintenance of the idle control system
• Check for vacuum leaks periodically
• Ensure electrical connections are secure
Engine Performance
• Avoid driving with this code active as it may lead to stalling.
• Seek professional diagnosis if unsure about DIY repairs.
Check with your vehicle manufacturer for warranty coverage on engine components.
This code has been associated with idle control issues in various vehicles, often linked to wear and tear of the idle speed control valve.
Moderate – It should be addressed soon to prevent potential stalling.
Driving with a faulty idle speed control can lead to unsafe driving conditions due to potential stalling.
• Engine at operating temperature
• Idle speed monitoring
The idle speed control valve is typically located on or near the throttle body of the engine.
Q: Can I drive my car with a P153C code?
A: It's not recommended as it can lead to stalling and unsafe driving conditions.
Q: How can I prevent a P153C code?
A: Regular maintenance and checking for vacuum leaks can help prevent this issue.
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