Intake Valve Timing Control Position -- Bank 2 (Nissan/Infiniti)
What does P1145 mean?
The P1145 code means the vehicle's onboard diagnostic system has detected: Intake Valve Timing Control Position -- Bank 2 (Nissan/Infiniti). This is a moderate severity code.
Common Symptoms
- Check Engine Light on
- Rough idle
- Reduced engine power
- Poor fuel economy
- Engine rattling noise at startup
Probable Causes (Ranked by Likelihood)
- Dirty or sludged engine oil restricting VTC operation Very High
- Failed intake VTC solenoid valve -- bank 2 High
- Timing chain stretch affecting VTC position Moderate
- Clogged oil passage to VTC actuator Moderate
- Failed VTC actuator (cam phaser) Low
Step-by-Step Diagnostic Procedure
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Check engine oil level and condition -- change if dirty or overdue
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Inspect the intake VTC solenoid valve on bank 2 for proper operation
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Check oil pressure with a gauge -- low pressure can prevent VTC operation
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Listen for timing chain rattle at startup -- may indicate stretch
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Monitor VTC target versus actual position with a scan tool
Frequently Asked Questions
Can I drive with code P1145?
You can drive short distances, but the engine will have reduced performance. If you hear a rattling noise at startup, have it checked soon as this may indicate timing chain issues.
What causes P1145 on Nissan?
Dirty or sludged engine oil is the most common cause. Nissan VTC systems are sensitive to oil condition. The VTC solenoid valve can also fail, preventing proper camshaft timing control.
Will an oil change fix P1145?
In many cases, yes. If the oil is old or sludgy, a fresh oil change with the correct viscosity may restore VTC operation. If the code returns after an oil change, the VTC solenoid or actuator may need replacement.