Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means the car's computer is having trouble with a sensor that checks how good the engine oil is or with a part that helps the engine's camshaft move correctly.
The P1520 code is triggered when the engine control module (ECM) detects an issue with the engine oil quality sensor or the 'B' camshaft position actuator control circuit in Bank 1.
This code indicates a fault in the engine oil quality sensor, which measures the oil's condition, or a problem with the camshaft position actuator control circuit. The 'B' camshaft refers to the exhaust camshaft in a dual camshaft engine. The ECM uses this data to optimize engine performance and efficiency.
• Check Engine Light is on
• Poor engine performance
• Decreased fuel efficiency
• Faulty engine oil quality sensor
• Wiring issues in the camshaft actuator circuit
• Failed camshaft position actuator
ECM: Engine Control Module
Camshaft: A shaft in the engine that controls the opening and closing of the valves
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage.
• Test the engine oil quality sensor and camshaft actuator.
• Replace the engine oil quality sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Replace the camshaft position actuator if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $500
Moderate
• BMW 3 Series
• BMW 5 Series
• BMW X5
• Regular oil changes with high-quality oil
• Routine inspection of engine sensors
• Timely maintenance of the camshaft system
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional mechanic.
• Avoid driving the vehicle excessively until repaired.
Check if the vehicle is under warranty for engine components.
This code is commonly associated with BMW vehicles that use the M52 engine.
Moderate – It should be addressed soon to prevent further engine issues.
Driving with a malfunctioning engine sensor can lead to increased emissions and potential engine damage.
• Engine at operating temperature
• Vehicle in idle or low-speed conditions
The engine oil quality sensor is located near the oil pan, and the camshaft position actuator is on the engine cylinder head.
Q: Can I drive with a P1520 code?
A: It's not recommended to drive for long with this code as it may lead to engine performance issues.
Q: How can I prevent this issue?
A: Regular maintenance and using quality engine oil can help prevent this issue.
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