P0340 on a Volvo: Causes, Fixes & Repair Cost

⚠️ Severe · not recommended to drive

The engine may not start, or it may stall while driving, so have the car towed if it won't start.

What P0340 means on a Volvo

On a Volvo, P0340 means the engine computer is getting no signal or a bad signal from the camshaft position sensor. Without camshaft position, the computer can't time fuel injection correctly, and the engine may refuse to start or may stall.

Is P0340 common on Volvos?

P0340 shows up on Volvos with higher mileage, often the S60, V70, XC90, and XC60 with five-cylinder or four-cylinder engines. The camshaft position sensor mounts at the end of the cylinder head, and sensor failure is the usual cause. Oil contamination from engine leaks can also affect the sensor or its connector.

Commonly reported on: S60, V70, XC90, XC60.

Symptoms

Check engine light is on
Engine cranks but won't start
Engine stalls while driving
Rough running or loss of power

Common causes

most common: Failed camshaft position sensor
common: Oil contamination on the sensor or connector
common: Damaged wiring or connector at the sensor
less common: Timing belt or timing issues

How to fix it

Fix	DIY?	Typical cost
Replace the camshaft position sensor	Yes	$60–180
Repair damaged sensor wiring or connector	Mechanic	$100–250
Have a mechanic check the timing belt and related components	Mechanic	$500–900