Fault code P0017 – a step-by-step guide to diagnosing and fixing it

DTC P0017 is set when the signals from the car's crankshaft position (CKP) sensorand exhaust camshaft position (CMP) sensor on cylinder bank1 do not correlate with each other. This is usually when the position signals vary by more than 10 degrees. The crankshaft and camshaft are timed with precision and are supposed to operate in synchronisation. When they are out of sync, the fuel delivery, mixing and ignition processes are disrupted. It is therefore important to pay attention to this code.

• A stretched, worn or skipping engine timing beltor chain. This timing component keeps the crankshaft and camshaft moving in time with each other. It wears down over time and can skip a tooth or become misaligned. This problem could also be caused by a broken tensioner.
• A faulty sensor or damaged wires. Both of the position sensors can fail or their timing discs can break, affecting the transmission of information to the car's ECU module. Wires can crack, fray or corrode, affecting the sensor and valve circuits.
• Clogged oil channels or using the wrong kind of oil. If the oil isnt replaced on time or has the wrong viscosity, it can cause a blockage. This may reduce the oil pressure in the camshaft phaser, stopping it from functioning properly.
• A jammed phaser solenoid. If the valve wont open, the fluid wont be able to flow to rotate the camshaft.

• Decreased engine power and impaired acceleration
• An increase in fuel consumption
• A rough or erratic engine
• Starting problems
• Strange sounds while the power unit is running

• Check the engine oil level and top it up if necessary. If the oil is too old or sludgy, you may need to flush the system before changing it. This will help to maintain the cam phaser’s hydraulic drive and the belt/chain tensioner.
• Examine the CMP and CKP sensors, as well as the wiring harnesses attached to them. If the wires are visibly damaged or corroded, they will need to be replaced. Make sure there are no loose electrical connections. If the reluctor ring is missing teeth or worn, or the body of the device is defective, install a new sensor. Clean the contacts of the connectors using a special cleaning agent to remove contaminants and prevent further corrosion.
• Depending on the type of device, you may be able to measure the resistance and voltage of the sensors using a multimeter to see whether they fall within the normal ranges. You can check the signal pattern using an oscilloscope. If the signal is weak or no pattern is showing, the cause is probably the reluctor ring.
• Maintain, replace or adjust the components of the valve timing system. If the timing chain/belt is misaligned, check whether the tensioner is damaged. Install a new belt or chain if it is stretched or worn. Adjust the tension if necessary. You should also inspect the phaser solenoid for faults.