P002C: B Camshaft Profile Control Circuit High (Bank 1)
May cause reduced power, poor throttle response, unstable idle, and reduced fuel economy
Overview
OBD-II DTC P002C indicates a high voltage condition in the bank 1 B camshaft profile control circuit affecting variable valve timing systems
Common Symptoms
- Check Engine Light illuminated
- Reduced engine power
- Poor throttle response
- Reduced fuel economy
- Unstable idle / rough idle
Most Common Causes
Solenoid failure is frequently noted in professional guides as a root cause for high circuit readings
Dirty or incorrect oil affects hydraulic VVT operation leading to electrical anomalies
Wiring shorts, opens, or corroded connectors can produce high voltage readings
Incorrect sensor feedback may be interpreted as a high circuit condition
Rare; consider after ruling out mechanical/electrical issues
Diagnostic Steps
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Verify the presence of P002C and any related codes with a professional-grade scan toolExpected: P002C present with or without additional VVT/Oil related codesInterpretation: Confirms circuit fault and checks for related systems
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Check engine oil level and condition; change oil and filter if dirty or incorrectExpected: Oil at correct level and cleanInterpretation: Ensures proper hydraulic operation for VVT
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Visually inspect wiring and connectors for the B camshaft profile control circuitExpected: No damage, corrosion, or loose connectorsInterpretation: Eliminates common electrical faults
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Test resistance and control signal of camshaft profile control solenoidExpected: Solenoid resistance within specification and proper signalInterpretation: Identifies solenoid as cause if out of spec
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Inspect camshaft position sensor output and operationExpected: Sensor outputs expected waveformInterpretation: Faulty sensor can mimic circuit high conditions
Repair Solutions
Typical repair when solenoid is faulty
Costs vary with complexity and access
Essential maintenance and inexpensive
If sensor diagnostics confirm failure
Only after all other causes have been ruled out
Common Misdiagnoses
Avoid these common diagnostic mistakes:
- Fault misattributed solely to camshaft position sensor without checking oil or solenoid
- Assuming ECM failure without electrical/mechanical diagnostics
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