Crankshaft Position Camshaft Position Correlation Bank 1 Sensor A

What is P0016?

P0016 indicates the engine's timing is out of sync between the crankshaft and camshaft on bank 1, which is a medium-severity powertrain issue that can cause poor performance and engine damage if ignored. This code is often triggered by mechanical timing component failures or oil-related problems affecting the variable valve timing system. Based on real owner data, this is a common issue in vehicles like the GMC Yukon and Toyota Tundra, with repair costs showing an extreme range from $4 to $3500.

Common Causes

• ●Timing chain or belt wear or stretching, which is a frequent mechanical failure in high-mileage vehicles.
• ●Oil leaks from the timing cover contaminating components, as reported in multiple Toyota Tundra cases where the alternator was caked in oil.
• ●Variable valve timing (VVT) solenoid or phaser malfunction, which directly controls camshaft timing.

Symptoms You May Notice

• ●Reduced engine power, with owners reporting up to 25% power loss, as mentioned in Toyota Tundra experiences.
• ●Poor shifting or transmission performance, noted by owners who said the truck 'shifts like it should' after repair.
• ●Illuminated check engine light, which is the primary indicator that triggers this diagnostic code.

How to Fix It

• ●Timing chain/belt replacement with associated components ($500-$2000, high difficulty - only 4% DIY rate)
• ●Repair of timing cover oil leaks and cleaning of oil-fouled components ($300-$800, medium difficulty)
• ●Replacement of variable valve timing solenoid or phaser ($150-$400, medium difficulty)