P0016
Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A)
Encountering the engine check light code P0016 signifies an explicit mechanical or electrical operational breakdown categorized as "Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A)". Professional scanner tools usually flag this subsystem loop early on.
Driver's Summary
P0016 is triggered when the PCM detects an abnormal condition associated with crankshaft position - camshaft position correlation (bank 1 sensor a). Typical symptoms include engine misfire, reduced power, hard start condition, rattling noise. This condition is classified as high severity. Prompt diagnosis is essential to prevent cascading damage to related components.
Symptoms
Engine misfire, reduced power, hard start condition, rattling noise
Common Causes
- Stretched timing chain
- Skipped timing tooth
- Faulty camshaft or crankshaft sensor
- Damaged timing chain tensioner
How to Fix
- 1 Replace timing chain and tensioners
- 2 Test and replace camshaft position sensor
- 3 Test and replace crankshaft position sensor
- 4 Verify engine timing marks
Technical Explanation
Code P0016 is confirmed when the ECM's diagnostic algorithm detects a parameter deviation that persists across a defined number of consecutive drive cycles. The diagnostic runs during closed-loop operation only, ensuring the engine is at full operating temperature and the PCM's fuel trim feedback loop is active before confirming any out-of-range condition. The fault remains stored in memory even after the MIL is cleared; it becomes a confirmed DTC after failing two consecutive drive cycles, and the PCM logs a freeze frame record of the engine's exact operating state at the moment of detection.
Is It Safe to Drive?
This fault carries real mechanical risk. The root causes — including stretched timing chain — can trigger a chain reaction of component failures if the vehicle continues to be driven. Have it towed or drive directly to a shop without delay.
Mechanic's Pro Tip
With P0016, always change the engine oil with the correct factory viscosity as the absolute first step before any electrical testing — dirty or wrong-viscosity oil prevents VVT actuators from responding properly regardless of solenoid condition. After the oil change, warm the engine fully and monitor camshaft advance angle live on a scan tool; if it still won't advance to the commanded target, then test the VVT solenoid. Cleaning the solenoid's internal filter screen (often packed with sludge) resolves a large percentage of these codes without replacing the solenoid.
Sensors: $150 - $300; Timing Chain Kit: $1,000 - $2,000