Camshaft Position Sensor "B" Circuit Low (Bank 1)
P0367 indicates the camshaft position sensor B circuit on Bank 1 is reading a voltage that is too low, preventing the engine control module from properly synchronizing fuel injection and ignition timing with the camshaft position. This fault can cause starting difficulties, rough running, and reduced engine performance.
What You Might Notice
- Check engine light illumination
- Hard starting or difficulty starting the engine
- Engine stalling or running rough
- Loss of engine power or acceleration hesitation
- Unstable idle
Most Common Causes
- 1
Faulty camshaft position sensor B
The sensor has failed internally or is producing an out-of-range voltage signal. This is the most common cause of low voltage circuit faults.
- 2
Open or shorted sensor harness
The wiring connecting the camshaft position sensor B to the ECU is broken, disconnected, or shorted to ground, preventing proper signal transmission.
- 3
Poor electrical connections
Corroded, loose, or damaged connector pins at the sensor or ECU connection points are causing voltage drops and weak signal readings.
- 4
Faulty engine control module or wiring to ECU
The ECU itself may have internal circuit damage, or wiring between the sensor and ECU may be damaged or improperly grounded.
How to Diagnose It
- 1
Check Faulty camshaft position sensor B — The sensor has failed internally or is producing an out-of-range voltage signal. This is the most common cause of low voltage circuit faults.
- 2
Check Open or shorted sensor harness — The wiring connecting the camshaft position sensor B to the ECU is broken, disconnected, or shorted to ground, preventing proper signal transmission.
- 3
Check Poor electrical connections — Corroded, loose, or damaged connector pins at the sensor or ECU connection points are causing voltage drops and weak signal readings.
- 4
Check Faulty engine control module or wiring to ECU — The ECU itself may have internal circuit damage, or wiring between the sensor and ECU may be damaged or improperly grounded.
How to Fix It
- 1
Replace camshaft position sensor B
Locate and remove the faulty sensor on Bank 1, then install a new OEM or quality aftermarket sensor. Ensure the connector is fully seated and secure.
- 2
Inspect and repair sensor harness
Check the wiring harness connecting the sensor to the ECU for breaks, corrosion, or exposed wires. Repair damaged sections or replace the entire harness if necessary.
- 3
Clean and reseat connectors
Disconnect and inspect both the sensor connector and ECU connector for corrosion or loose pins. Clean with electrical contact cleaner and firmly reseat both connectors.
- 4
Test battery and ground connections
Verify the battery is fully charged and in good condition. Check all engine ground straps and sensor ground connections for corrosion or looseness, and clean or repair as needed.
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