P1663 — OCV Circuit Malfunction Bank 2

Causes

• Open or short in OCV wiring (bank 2)
• Poor or corroded connector at the OCV
• Failed oil control valve (OCV) solenoid)
• Faulty ECM driver or internal ECM fault
• Low engine oil level, contaminated oil, or blocked oil passages affecting valve operation
• Intermittent connection due to chafed wires or broken terminals

Symptoms

• Check Engine MIL illuminated
• Reduced engine performance, hesitation or rough idle (depending on affected bank and VVT mode)
• Possible increased fuel consumption or poor throttle response
• Engine may run differently at certain rpm/load conditions
• No cranks/starts not typical solely from this code (but possible starting roughness if oil pressure is very low)

What to check

• Read and record all stored DTCs and freeze frame data with a scan tool
• Visual inspection of wiring and connectors for the bank 2 OCV(s) — look for damage, corrosion, pin push-out, or recent repair work
• Verify engine oil level and condition; correct if low or dirty
• Backprobe OCV connector to check supply voltage and ground while activating OCV with a scan tool
• Measure static coil resistance of the OCV solenoid(s) and compare to specification
• Wiggle test wiring while monitoring live data or DTC status for intermittent faults

Signal parameters

• Supply voltage: nominal battery voltage (~12 V) present at connector supply pin
• Control signal: ECM typically uses a switched ground or PWM duty cycle (0–100%) to control OCV
• Typical coil resistance: commonly in the low ohm range (example 6–14 Ω) — consult vehicle service manual for exact spec
• Expected behavior on activation: change in commanded duty cycle and corresponding engine/VVT response; coil current should be within specification
• No continuity to ground (open) or near-short to ground/12V indicates wiring or coil fault

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