What does it mean?
P1569 is a Powertrain (engine, transmission, fuel system) fault code. It indicates: Variable Timing Control System Circuit Low Input .
Symptoms
- Check engine light on with the fault stored under load or at higher rpm
- Rough idle and a loss of pulling power in the mid range
- Rattle or a short knocking noise from the front of the engine on start-up
- Increased fuel consumption and duller throttle response
- Engine may run acceptably at idle but feel flat when the timing should advance
- Additional camshaft timing correlation codes may appear at the same time
Likely causes
- Oil control valve (variable timing solenoid) winding shorted internally
- Control wire chafed against the cylinder head or a bracket and shorted to ground
- Oil contamination in the solenoid connector, which is very common on this circuit
- Loss of the supply feed to the solenoid because of a blown fuse or a corroded terminal
- Clogged oil control valve screen or sludge in the oil galleries, so the actuator cannot respond as commanded
- Low or degraded engine oil that prevents the cam phaser from moving
- Damaged solenoid driver inside the PCM
How to fix it
- Check the engine oil level and condition first, because low or dirty oil is a frequent trigger for this circuit
- Unplug the oil control valve and inspect the connector for oil, corrosion and spread terminals
- Measure the solenoid winding resistance and compare it against the specified value
- Test the control wire for a short to ground with the module and the solenoid disconnected
- Command the solenoid with a scan tool while watching the actual camshaft position change in live data
- Remove the solenoid and clean or replace the filter screen if it is blocked with sludge
- Replace the oil control valve if it fails testing, then clear the code and verify cam advance under load