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 is noticing a problem with the part that controls the engine's idle speed. It's like when you're trying to keep a toy spinning at the same speed, but it keeps slowing down or speeding up unexpectedly.
The engine control module (ECM) is detecting a discrepancy between the desired and actual idle speed values on bank 1.
The P152C code indicates that the ECM has detected a variation between the expected and actual values from the idle speed control valve on bank 1. This could result from issues with the valve itself, wiring problems, or a fault in the ECM.
• Unstable or fluctuating idle speed
• Engine stalling at idle
• Check Engine Light illuminated
• Faulty idle speed control valve
• Wiring issues or poor electrical connections
• Faulty engine control module (ECM)
ECM: Engine Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the code.
• Inspect the idle speed control valve for damage or blockage.
• Check wiring and connections for continuity and damage.
• 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 - $500
Moderate
• BMW 3 Series
• BMW 5 Series
• BMW X5
• Regular maintenance of the idle speed control valve.
• Ensure all electrical connections are secure.
• Use high-quality fuel to prevent deposits.
Engine Performance
• Avoid driving with a fluctuating idle, as it can lead to stalling.
• Seek professional diagnosis to prevent further issues.
Check with your vehicle manufacturer for warranty coverage on engine components.
This code is commonly associated with BMW vehicles and may indicate a recurring issue with the idle speed control system.
Moderate – Should be addressed soon to prevent stalling and drivability issues.
Driving with this issue may lead to stalling, which can be dangerous in traffic conditions.
• Engine at operating temperature
• Vehicle in idle state
The idle speed control valve is typically located on the throttle body of the engine.
Q: Can I drive with a P152C code?
A: It's not recommended to drive for long periods with this code, as it can lead to stalling.
Q: How do I reset the Check Engine Light after a repair?
A: Use an OBD-II scanner to clear the code after the issue is fixed.
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