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 getting a signal that's too high from a sensor that helps control the engine's camshaft on one side of the engine.
The P2B46 code indicates that the voltage signal from the camshaft position actuator position sensor B on bank 2 is higher than expected.
The camshaft position actuator position sensor B on bank 2 is providing a voltage signal that exceeds the threshold set by the engine control module (ECM). This sensor helps the ECM determine the position of the camshaft for optimal engine performance. A high circuit signal may indicate a wiring issue, a faulty sensor, or a problem with the ECM.
• Check Engine Light is on
• Poor engine performance
• Rough idling
• Faulty camshaft position actuator position sensor
• Wiring issues such as short to voltage
• Faulty engine control module (ECM)
Camshaft: A shaft with cams that rotates to open and close engine valves.
ECM: Engine Control Module, the computer that controls engine functions.
• Use an OBD-II scanner to verify the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the camshaft position actuator position sensor and replace if faulty.
• Replace the camshaft position actuator position sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Socket set
$150 - $400
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regularly inspect and maintain engine wiring.
• Ensure connectors are clean and secure.
• Perform regular engine diagnostics.
Sensor Issue
• Have your vehicle inspected by a professional mechanic.
• Avoid driving the vehicle if performance issues are severe.
Check with your vehicle manufacturer for warranty coverage on engine sensors.
This code is often associated with vehicles that have variable valve timing systems and is common in models with higher mileage.
Moderate – It should be addressed soon to prevent potential engine damage.
Driving with a faulty camshaft position sensor can lead to reduced engine performance and increased emissions.
• Engine running
• Vehicle at operating temperature
The camshaft position actuator position sensor is typically located near the camshaft on bank 2 of the engine.
Q: Can I drive with a P2B46 code?
A: It's not recommended to drive for long periods with this code as it can lead to engine performance issues.
Q: How do I reset the check engine light after repairs?
A: Use an OBD-II scanner to clear the code after repairs are completed.
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