P0340 — Camshaft Position Sensor Circuit Malfunction (Bank 1)
Category: Powertrain Severity: High
Updated:
DTC code P0340 means: Camshaft Position Sensor Circuit Malfunction (Bank 1). It falls under the "Powertrain" category, with an estimated severity of High. Common causes include faulty camshaft position sensor, wiring/connector issue and timing chain/belt problem; it's worth confirming the diagnosis before replacing parts.
Possible causes
- Faulty camshaft position sensor
- Wiring/connector issue
- Timing chain/belt problem
- Damaged tone wheel
Symptoms
- Engine vibration
- Loss of power
- Higher fuel consumption
- Engine may not start
How to diagnose it step by step
- Check the cam sensor connector (sometimes oil-soaked).
- Measure supply and signal.
- Verify timing.
- Replace the sensor.
How to fix it
Check spark plugs, coils and position sensors (crankshaft/camshaft); replace any faulty part.
Estimated repair cost
$80–250 installed.
Frequently asked questions
What does DTC code P0340 mean?
Camshaft Position Sensor Circuit Malfunction (Bank 1).
Is code P0340 serious?
Severity High. Have it checked as soon as possible, especially if it affects safety or the catalytic converter.
Can I keep driving with code P0340?
Carefully; starting may take longer.
Related codes
P0341 P0344 P0345 P0336 P0335 P0332 P0351 P0352 P0353 P0354
Refine by car make
- Audi P0340: Camshaft sensor.
- BMW P0340: Camshaft sensor (known failure on several engines).
- Citroën P0340: Spark plugs, coils, or position sensor.
- Dacia P0340: Spark plugs or coils.
- Fiat P0340: Spark plugs or coils.
- Ford P0340: Camshaft position sensor.
- Honda P0340: Spark plugs, coils, or position sensor.
- Hyundai P0340: Coils or spark plugs.
- Kia P0340: Coils or spark plugs.
- Mazda P0340: Coils or spark plugs.
- Mercedes-Benz P0340: Spark plugs, coils, or position sensor.
- Nissan P0340: Coils, spark plugs, or position sensor.
- Opel P0340: Camshaft sensor.
- Peugeot P0340: Camshaft position sensor.
- Renault P0340: Camshaft position sensor.
- Toyota P0340: Camshaft position sensor.
- Volkswagen P0340: Camshaft sensor.
- Volvo P0340: Coils or spark plugs.
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