P0365

What it means

P0365 is the generic code for a fault in the camshaft position sensor B circuit on bank 1. The engine control unit compares the signal from this sensor with the crankshaft position signal and has seen no signal, an implausible signal or an electrical fault. Sensor B is usually the exhaust camshaft sensor on bank 1, but the labelling depends on the engine, so check the manufacturer's data for your model.

Symptoms

• Engine management light on
• Long cranking or hard starting
• Engine stalling or cutting out unexpectedly
• Rough running or misfire
• Loss of power and poor fuel economy
• Engine running in limp mode

Possible causes

• Faulty camshaft position sensor B on bank 1likely
• Damaged, chafed or corroded wiring to the sensor (open circuit, short or high resistance)likely
• Loose, corroded or contaminated connector at the sensor or control unitlikely
• Damaged or contaminated reluctor or target wheel on the camshaftpossible
• Camshaft timing out of position due to a stretched chain, worn tensioner or jumped beltpossible
• Oil leak or oil contamination affecting the sensor or its connectorpossible
• Fault in the engine control unitrare

How to diagnose

1. Read all stored and pending codes and record the freeze frame data to see the conditions when the fault set.
2. Check for related codes such as crankshaft sensor, cam timing or misfire codes, which can point to a shared cause.
3. Identify which sensor is bank 1 sensor B on this engine using the manufacturer's data, then inspect it and its connector for oil, damage, looseness and corrosion.
4. Inspect the wiring loom along its full length for chafing, heat damage and broken insulation, and wiggle test it while watching live data.
5. Check the sensor supply voltage, earth and signal at the connector against the manufacturer's specification.
6. Check the sensor signal on a suitable oscilloscope alongside the crankshaft signal, looking for dropouts or a poor pattern.
7. Inspect the reluctor or target wheel for damage, debris or play where it is accessible.
8. Check the cam timing against the specification and inspect the chain or belt and tensioner for wear or slack.

How to fix

• Replace the camshaft position sensor B on bank 1 if it fails testing.
• Repair or replace damaged wiring, and clean or renew faulty connector terminals.
• Fix any oil leak and clean or replace the contaminated connector or sensor.
• Replace a damaged reluctor or target wheel.
• Correct the cam timing and renew the worn chain, belt or tensioner components as required.
• Once all other causes are excluded, check for a control unit fault and repair or replace it as the manufacturer advises.

Can I keep driving?

Nearby codes

• P0364GenericDC/AC Converter Control Module Control Circuit Range/Performance
• P0366GenericCamshaft Position Sensor B Circuit Range/Performance Bank 1