Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car's brain thinks the engine's camshaft is moving slower than it should, which can make the car run poorly.
The camshaft timing is not advancing as expected, causing the engine to run inefficiently.
The P0012 code indicates that the Engine Control Module (ECM) has detected that the camshaft timing for bank 1 is over-retarded. This means the camshaft is not in the correct position relative to the crankshaft, causing potential performance issues.
• Check Engine Light on
• Rough engine idle
• Decreased fuel efficiency
• Low engine oil level
• Faulty camshaft timing control valve
• Timing chain or belt issues
Camshaft: A shaft with cams that rotates to open and close engine valves.
ECM: Engine Control Module, the computer that controls engine functions.
• Check engine oil level and quality
• Inspect the camshaft timing control valve
• Verify timing chain or belt condition
• Change or top up engine oil
• Replace camshaft timing control valve
• Repair or replace timing chain/belt
• OBD-II scanner
• Wrench set
• Timing light
$200 - $1000
Moderate
• Toyota Camry
• Ford F-150
• Honda Accord
• Regular oil changes
• Routine engine maintenance
• Timely replacement of timing components
Engine Performance
• Do not ignore the Check Engine Light
• Regularly check and maintain oil levels
• Consult a mechanic if unsure
Check with your vehicle manufacturer for specific warranty coverage on engine components.
This code has been more common in vehicles with high mileage or poor maintenance history.
Moderate – Should be addressed soon to avoid further engine damage.
Driving with this code can lead to increased emissions and potential engine damage.
• Engine at operating temperature
• Vehicle at idle
The camshaft is located in the engine cylinder head, typically near the top of the engine.
Q: Can I drive with a P0012 code?
A: It's not recommended to drive for long periods with this code as it can cause engine damage.
Q: Will a P0012 code clear itself?
A: The code may clear temporarily, but the underlying issue needs to be fixed to prevent it from returning.
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