OBD-II Car P0011 Error
What it means
P0011 is a generic code meaning '"A" Camshaft Position - Timing Over-Advanced or System Performance (Bank 1)'. It is set by the variable valve timing (VVT) system. The ECM commands a camshaft phaser to advance or retard the intake ("A") cam relative to the crankshaft; P0011 means the actual cam timing is more advanced than commanded, or the phaser is not responding correctly on Bank 1 (the cylinder bank containing cylinder #1). Common symptoms: check engine light, rough or rolling idle, hesitation or stalling, reduced power and poor fuel economy, and sometimes a rattling noise on start-up.
The bottom line on the P0011 error
P0011 is a VVT cam-timing fault on Bank 1, and because the system is hydraulic the real culprit is often dirty or low oil clogging the oil control valve โ not a failed phaser. Clearing the code without fixing the oil or valve just lets it return.
Start with the cheapest step: an oil and filter change in the correct viscosity, then cleaning or replacing the Bank 1 VVT solenoid ($30โ$150). Only if the phaser or timing chain is at fault does the bill jump to $600โ$1,500+ โ the heavy labor to reach timing components makes it a shop job.
P0011 snapshot
Our own at-a-glance triage of the P0011 error, from the verified data on this page. See error-code rankings โ ยท How we score โ
Common causes of the P0011 error
- Dirty or old engine oil clogging the VVT oil control valve (the most common cause)
- Failed or stuck camshaft oil control valve (OCV) / VVT solenoid on Bank 1
- Clogged oil passages or screens feeding the camshaft phaser
- Faulty camshaft phaser/actuator stuck in an advanced position
- Wiring or connector fault to the OCV; low oil pressure or wrong oil viscosity
- Stretched timing chain, worn timing belt, or a faulty tensioner (if the code persists after the common causes are ruled out)
Which OBD-II cars get the P0011 error
P0011 appears on virtually any engine with variable valve timing on the intake cam. It is reported often on GM Ecotec four-cylinders and the GM 3.6L V6, Toyota/Lexus VVT-i engines, Nissan, Hyundai/Kia, Ford, and VW/Audi engines from the mid-2000s onward. Higher-mileage engines and those on extended or neglected oil-change intervals are the most prone because sludge restricts the VVT oil control valve.
How to fix the OBD-II Car P0011 error
- 1Check oil level and conditionVVT is hydraulically driven, so dirty or low oil is the #1 trigger. Confirm the oil is at the correct level and not sludgy. If it is overdue, an oil and filter change with the manufacturer-specified viscosity sometimes clears the code on its own.
- 2Scan and record the dataPull the code with an OBD-II scanner and note freeze-frame data and any companion codes. P0011 is Bank 1 โ knowing which bank narrows down which solenoid and phaser to inspect.
- 3Inspect and clean the oil control valveRemove the Bank 1 camshaft oil control valve (VVT solenoid). Inspect the screen for debris and clean it. Test the solenoid's resistance and its ability to actuate. Replace it if it is clogged, sticking, or out of spec.
- 4Inspect the phaser and wiringCheck the solenoid connector and wiring for damage. If the valve and oil are good but the code persists, the camshaft phaser itself may be worn or stuck โ this is a deeper repair usually best left to a shop.
๐งฐ When to call a professional
Call a professional if cleaning the oil control valve and changing the oil do not clear the code, if the phaser needs replacement (involves timing components), or if you hear loud start-up rattle โ that can signal a worn phaser or a stretched timing chain that requires expert diagnosis.
OBD-II P0011 vs OBD-II P0340 vs OBD-II P0300: how they compare
How this code stacks up against related error codes for difficulty, urgency, and cost.
| OBD-II P0011 | OBD-II P0340 | OBD-II P0300 | |
|---|---|---|---|
| DIY difficulty (1โ5) | 3 | 3 | 3 |
| Urgency (1โ5) | 3 | 4 | 4 |
| Typical cost | $$ | $$ | $$ |
How much does it cost to fix the P0011 error?
| DIY parts only (oil change + VVT solenoid) | $50โ$250 |
| Professional diagnosis & solenoid repair | $150โ$450 |
| Camshaft phaser / timing component repair | $600โ$1,500+ |
Repair or replace?
This is almost always a repair, not a reason to replace the vehicle. Start with the cheapest fix โ fresh oil of the correct viscosity and a VVT/oil control valve โ which resolves a large share of cases. Only if the phaser or timing chain is at fault does the bill climb into four figures because of the labor to reach timing components; on a high-mileage engine, weigh that larger repair against the car's overall value. Prices vary by model and region, so treat these as general ranges.
Common replacement parts for the P0011 error
| Camshaft oil control valve (VVT solenoid), Bank 1 | $30โ$150 | The most common part-level fix; inspect and clean before replacing | |
| Engine oil & filter change | $40โ$100 | Always the first, cheapest step โ use the specified viscosity | |
| Camshaft phaser / actuator | $150โ$500+ part | Deeper repair with heavy labor; usually a shop job |
Prices are typical retail ranges and vary by model and supplier โ always confirm the exact part number for your appliance before buying.
OBD-II P0011 error โ FAQ
๏ผ โ Is it safe to drive with this code?
Short trips are usually okay, but it is not recommended for long. Incorrect cam timing can cause hesitation, stalling, and poor performance, and a stuck phaser or low oil pressure can contribute to engine wear over time. Address it promptly, especially if you hear knocking or rattling.
๏ผ โ How much does it cost to fix?
If it is just an oil change plus a VVT solenoid, expect roughly $50โ$300 total. A failed camshaft phaser is much pricier โ often $600โ$1,500+ because of the labor to access timing components. An oil change should always be the first, cheapest step to try.
๏ผ โ Can dirty oil really cause P0011?
Yes โ this is one of the most common causes. The VVT system uses pressurized engine oil to move the cam phaser. Sludge, the wrong viscosity, or a low oil level restricts the oil control valve and prevents the phaser from responding, setting P0011.
Sources & manufacturer references
This guide is independently written and not affiliated with OBD-II. Always unplug appliances before servicing and follow your model's manual. Error codes and steps can vary by model โ when in doubt, consult a qualified technician.