What does P0016 mean?
The crankshaft and intake camshaft positions on Bank 1 are not correlating correctly — often a timing chain issue.
Quick Decision Guide
- Stretched or worn timing chain
- Failed timing chain tensioner
- Stuck VVT oil control valve (OCV)
When to stop driving
If you hear rattling or chain noise, stop driving — a jumped timing chain on an interference engine can cause pistons to strike valves, resulting in catastrophic engine damage. If the engine runs smoothly and oil is the suspected cause, you can drive cautiously to a shop.
Reviewed by ratchit Automotive Solutions for clarity and inspection-first safety framing. Not a substitute for professional diagnosis.
Repair Decision & Cost Guide
Use this guide to decide what to inspect first, what it may cost, and when to move from DIY checks to professional diagnosis.
P0016 is a clue, not a confirmed diagnosis. Inspect simple causes before replacing parts.
DIY vs. Shop
Can you keep driving?
Best first DIY check
Don't replace this first
When to seek a shop
Recommended next action
Estimated Repair Cost
Inspection cost
$0–$25 DIY scanner
DIY parts cost
$25–$400
Inspect first before replacing parts.
If the vehicle is unsafe to drive, stop driving and seek professional help.
Shop diagnostic cost
$80–$150 (typical shop diagnostic fee)
Shop repair cost
$50–$2,500
Diagnostic uncertainty: This code points to a system or condition, not a guaranteed failed part. Inspect before replacing.
Cost variation: Costs vary by vehicle, location, part quality, labor rate, and the confirmed root cause.
Inspect Before Replacing
These checks are cheap, fast, and rule out the most common causes before spending money on parts.
- 1Check oil level and condition immediately. Low or degraded oil is the most common correctable cause.
- 2Listen for a rattling or chain-slap noise — this strongly suggests timing chain stretch.
Track this ignition/timing issue
Save this issue to My Garage, track what you inspect, and build service history for this vehicle.
V-IQ readiness preview: High impact — resolving and tracking this issue may noticeably improve your V-IQ readiness. Tracking active codes and resolutions builds a service history we use to estimate V-IQ readiness over time.
Understanding P0016 in detail
P0016 indicates the ECM detected a discrepancy between the crankshaft position (CKP) and the intake camshaft position (CMP) on Bank 1 that exceeds the allowable tolerance. In a properly timed engine, these positions have a fixed, predictable relationship. When the timing chain stretches, skips a tooth, or the tensioner fails, the camshaft drifts from its intended position relative to the crankshaft. The VVT oil control valve can also cause this code if it sticks and moves the camshaft beyond the ECM's expected range. This code can also appear after low oil conditions (which starve the VVT system and tensioner) or when the CKP or CMP sensor itself provides an erratic signal. The severity ranges from moderate (VVT solenoid or oil issue) to critical (timing chain skip or jump, which can cause piston-to-valve contact on interference engines).
Symptoms of P0016
- Check engine light on
- Rattling or chain-noise from the engine
- Rough idle or running
- Loss of power
- Hard starting
Common causes
- Stretched or worn timing chain
- Failed timing chain tensioner
- Stuck VVT oil control valve (OCV)
- Low or degraded engine oil
- Faulty CKP or CMP sensor
How to diagnose P0016
Steps ordered by urgency — tackle Now items first.
- NowCheck oil level and condition immediately. Low or degraded oil is the most common correctable cause.
- NowListen for a rattling or chain-slap noise — this strongly suggests timing chain stretch.
- SoonTest the VVT oil control valve and replace if stuck.
- LaterIf noise or rough running persists after OCV and oil, have the timing chain inspected — replacement is labor-intensive but critical.
How to fix P0016
Fixes listed in order of likelihood and cost-efficiency.
- 1Oil change with manufacturer-specified grade
- 2Replace VVT oil control valve
- 3Replace timing chain, tensioner, and guides
- 4Replace CKP or CMP sensor (if signal is erratic)
Want to check your full vehicle?
Run a free maintenance scan to see what else needs attention based on your year, make, model, mileage, and climate.
Recommended tools & parts
These recommendations appear because this issue commonly requires inspection in this system area. ratchit does not recommend replacing parts until the likely cause is confirmed.
Sensor & Diagnostic Kit
Test and replace common engine sensors — O2, MAF, cam/crank
Check sensor behavior before replacing parts Verify fitment for your year/make/model.
Ignition & Misfire Inspection Kit
Inspect spark plugs, coils, and ignition components before replacing parts
Inspect spark plugs, coils, and misfire causes before buying parts Verify fitment for your year/make/model.
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Estimated Repair Cost — P0016
Ranges vary by vehicle, region, and shop. Use as a ballpark — always get a quote.
DIY estimate
$25 – $60
Shop estimate
$50 – $120
DIY estimate
$30 – $80
Shop estimate
$150 – $350
DIY estimate
$200 – $400
Shop estimate
$800 – $2,500
Cost data is estimated and may not reflect your specific vehicle or location.
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Frequently Asked Questions
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