P0017: Crankshaft Position – Camshaft Position Correlation (Bank 1 Sensor B)
The positions of the crankshaft and the "B" camshaft on bank 1 do not match as expected.
High risk
Drive carefully and have it checked soon; a timing fault can damage the engine.
Short answer · Can I keep driving with P0017?
Only with care. If the engine rattles or runs badly, stop driving and have it checked, as timing faults can damage valves and pistons.
What does P0017 mean?
Code P0017 means the signals from the crankshaft sensor and the bank 1 "B" camshaft sensor are out of their normal relation. A stretched timing chain, a jumped belt, a faulty adjuster or a sensor problem can cause it.
What the car does when the code is set
The check engine light comes on. The engine may idle roughly, lose power or use more fuel, because the valve timing is not where the engine control unit wants it. Some engines lock the camshaft adjuster in a default position.
How the system works
Variable valve timing lets the engine change when the valves open and close. A camshaft adjuster (phaser) on the end of the camshaft turns it a few degrees relative to the sprocket, driven by engine oil that an oil control valve directs to one side or the other. The engine control unit commands a target angle, then measures the real angle by comparing the camshaft and crankshaft sensor signals. If the measured angle differs from the target for too long, or the two signals are out of their normal relationship, it stores a code.
Common symptoms
Possible causes
Listed without ranking. The cause on your car depends on make, engine and mileage — see the maker notes below.
- Low or dirty engine oilVariable valve timing uses oil pressure; low level or old oil makes it slow.
- Faulty oil control valveThe solenoid that directs oil to the camshaft adjuster sticks.
- Worn camshaft adjusterThe adjuster (phaser) no longer holds its position.
- Stretched timing chain or jumped beltCamshaft and crankshaft are no longer in the correct relation.
- Sensor or reluctor wheel problemA faulty position sensor or damaged trigger wheel.
How it is diagnosed
- Check oil level and conditionTop up or change the oil with the specified grade first. This alone sometimes clears the fault.
- Compare desired and actual camshaft positionWith live data, watch whether the camshaft follows the commanded angle at idle and at higher revs.
- Test the oil control valveCheck its resistance and operation, and look for debris in its screen.
- Check the timingIf the readings point to a stretched chain, the workshop checks the timing marks or measures the offset.A worn timing chain can jump teeth and damage the engine. Do not delay the diagnosis.
Questions about P0017
Does P0017 mean the timing chain is stretched?
It is a common cause, especially with P0016 and P0018 too, but sensors and adjusters must be checked first.
Can low oil cause this code?
Yes. Valve timing control depends on oil pressure, so low or old oil is one of the first things to check.