P0011 Code Explained: “A” Camshaft Position – Timing Over-Advanced (Bank 1) – Causes & Fixes
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What does the P0011 Camshaft Position Timing Over Advanced or System Performance Bank 1 mean?
The P0011 code means that the ECM has detected a circuit issue with the solenoid actuator that directs oil pressure to the engine’s Variable Valve Timing system. it indicates an issue with the camshaft position actuator circuit for Bank 1, specifically the intake camshaft, is over-advanced.
What Does Bank 1 Mean?
On engines with more than one cylinder bank, such as V6 or V8 engines, the engine is divided into Bank 1 and Bank 2.
- Bank 1 is the side of the engine that contains cylinder number one.
- Bank 2 is the opposite side.
The P0011 code applies only to Bank 1 and “A” indicates Intake camshaft.
To learn how to diagnose car sensor–related issues and understand OBD-II codes, read our complete guide.
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Tired of expensive repair bills and mechanics who “parts-cannon” your car without finding the real issue? The “Check Engine” light shouldn’t be a mystery. This guide puts professional-level diagnostics in your hands.
When Does the P0011 Code Trigger?
The camshaft position sensor measures the position of the camshaft and sends this signal to the ECU. The ECU then sends a pulse command to the Variable Valve Timing (VVT) solenoid to advance or delay the cam position based on the engine load and speed. The VVT solenoid adjusts the cam phaser accordingly.
When the ECU detects that the Bank 1 intake camshaft position is over-advanced compared to the targeted cam angle, it triggers the P0011 code.
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How To Fix P0011?
Troubleshooting P0011 involves several steps, and we’ll discuss each one in detail. Let’s get started!
Before diving into specific repairs, perform an OBD-II scanner reset to clear the codes. Sometimes, these codes pop up due to recent maintenance work and can resolve themselves after a reset.
To learn how to diagnose car sensor–related issues and understand OBD-II codes, read our complete guide.
STOP GUESSING. START DIAGNOSING. SAVE HUNDREDS ON REPAIRS.
Tired of expensive repair bills and mechanics who “parts-cannon” your car without finding the real issue? The “Check Engine” light shouldn’t be a mystery. This guide puts professional-level diagnostics in your hands.
To reset the error codes, use an OBD-II scanner. Simply connect the scanner to your vehicle, follow the instructions to clear the trouble codes, and see if the P0011 code reappears.
If the code comes back, it means there’s a persistent issue that needs further troubleshooting.
⚠️ Safety Considerations Before Fixing P0011
Allow the engine to cool completely before beginning any inspection or repair work. Disconnect the negative battery terminal to prevent accidental short circuits or unintentional actuator movement while working on camshaft actuators, oil control valves, or VVT components.
Avoid touching hot engine parts, and keep tools and wiring clear of rotating components at all times.
Step-by-Step Guide to Fix OBD2 Code P0011
Step 1: Verify the Fault Code
Connect an OBD2 scanner to the vehicle’s diagnostic port and scan the system to confirm that code P0011 is present. Carefully check for related camshaft timing, oil control valve (OCV), or variable valve timing (VVT) codes, as these may indicate a shared electrical or oil-pressure-related issue.
Record freeze frame data, including engine RPM, oil temperature, and load conditions at the time the code was set. This information can help identify whether the fault occurs during startup, idle, or acceleration.
After documenting the codes, clear them and perform a short test drive. If P0011 returns immediately, the issue is likely electrical or mechanical rather than intermittent.
Tools required:
OBD-II scan tool (basic or advanced)
Estimated time:
5–10 minutes
Estimated cost:
$0 if you already own a scan tool, or $20–$100 depending on scanner type (many parts stores scan for free)
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Step 2: Check Engine Oil Level and Condition
Inspect the engine oil level and overall oil quality, as proper oil flow is critical for camshaft actuator and oil control valve operation. Low oil level, thick sludge, or heavily contaminated oil can prevent the camshaft actuator from responding correctly, triggering code P0011.
Check the oil using the dipstick and look for signs of:
- Low oil level
- Thick, dark, or sludged oil
- Burnt smell or metal particles
If the oil appears dirty or overdue for service, perform an oil and filter change using the manufacturer-recommended oil grade before continuing further diagnosis.
Tools required:
Engine oil dipstick, clean rag, correct engine oil (if topping up)
Estimated time:
5–15 minutes (oil change may take longer)
Estimated cost:
$0–$20 for oil top-up, or $40–$100 for an oil and filter change (depending on vehicle and oil type)
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Step 3: Verify Camshaft Position Signal and Related Wiring
Verify that the camshaft position sensor (Bank 1) is supplying a stable and consistent signal to the ECM. An intermittent camshaft position signal or unstable wiring can prevent the ECM from accurately controlling the camshaft actuator, leading to code P0011.
Inspect the sensor connector and wiring for:
- Loose or corroded terminals
- Damaged or oil-contaminated connectors
- Broken, chafed, or pinched wires
If available, use a scan tool to monitor live camshaft position data and check for signal dropouts while the engine is running or when gently moving the wiring harness. Repair any wiring faults or replace the sensor if the signal is unstable or out of specification.
Tools required:
Flashlight, basic hand tools (for connector access)
Estimated time:
10–20 minutes
Estimated cost:
$0–$30 (wiring repair or connector cleaning, if needed)
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Step 4: Test the Camshaft Actuator Solenoid
Disconnect the camshaft actuator solenoid (oil control valve) connector and use a digital multimeter to test the solenoid’s internal resistance. Compare the measured resistance value with the manufacturer’s specifications to determine whether the solenoid is operating correctly.
Next, check for proper power supply and ground signals at the connector with the ignition switched ON (engine OFF). An absence of voltage, poor ground, or readings outside specification may indicate a wiring fault, blown fuse, or ECM control issue.
If the solenoid resistance is out of range or electrical signals are inconsistent, replacement of the camshaft actuator solenoid is recommended.
Tools required:
Digital multimeter (DMM), vehicle wiring diagram or service manual
Estimated time:
25–60 minutes
Estimated cost:
$0 if testing only, or $50–$200 if sensor replacement is required (varies by vehicle)
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Step 5: Replace the Actuator Solenoid if Necessary
If electrical testing indicates out-of-spec resistance, no proper power or ground signal, or the solenoid is mechanically stuck or unresponsive, replace the Bank 1 camshaft position actuator solenoid (oil control valve).
Remove the old solenoid following manufacturer procedures, ensuring the mounting area is clean and free of debris. Install the new solenoid, reconnect the electrical connector securely, and reinstall any components removed for access.
After replacement, reconnect the battery, clear the trouble codes, and perform a test drive to verify that code P0011 does not return and engine performance has returned to normal.
Tools required:
Basic hand tools (socket set, ratchet), Torque wrench (recommended)
Estimated time:
30–45 minutes
Estimated cost:
$60–$250 (actuator solenoid replacement, depending on vehicle)
What does the P0011 code mean?
Code P0011 means the intake camshaft timing is over-advanced on Bank 1. The engine control module detects that the camshaft position is more advanced than commanded, usually due to oil control or actuator issues.
Can I drive with a P0011 code?
In some cases the vehicle may still be drivable, but continued driving with a P0011 code is not recommended. Over-advanced camshaft timing can cause poor performance, increased fuel consumption, and potential engine damage if ignored.
What are the most common causes of P0011?
Common causes of P0011 include dirty or low engine oil, a faulty camshaft actuator solenoid, clogged oil passages, wiring issues in the actuator circuit, or internal mechanical timing problems.
Can low or dirty oil cause a P0011 code?
Yes. Low oil level, incorrect oil viscosity, or dirty oil can prevent proper oil flow to the camshaft actuator, causing the intake camshaft to remain over-advanced and triggering a P0011 code.
How much does it cost to fix a P0011 code?
The cost to fix a P0011 code typically ranges from $50 to $300. An oil change or actuator solenoid replacement is common, but costs may increase if timing components or internal engine repairs are required.
Will an oil change fix code P0011?
An oil change can fix P0011 if the issue is caused by dirty, thick, or incorrect oil. If the code returns after an oil change, further diagnosis of the camshaft actuator, wiring, or timing components is required.
