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P0020: "A" Camshaft Position Actuator Circuit (Bank 2)

Severity: Medium Arrange diagnosis promptly and avoid heavy loads. Stop the engine for timing-chain rattle, an oil-pressure warning, severe roughness, or a flashing check engine light; towing is safer than risking a timing failure.

What does P0020 mean?

The variable-valve-timing actuator circuit for camshaft A on bank 2 has an electrical fault. A usually identifies the intake cam and B the exhaust cam, but layouts vary. The oil-control solenoid changes cam timing; this code concerns its circuit rather than simply dirty engine oil.

Generic OBD-II definition: "A" Camshaft Position Actuator Circuit (Bank 2). Confirm applicability in your vehicle service information.

Common causes

  • Open or shorted wiring at the bank 2 VVT solenoid
  • Failed oil-control solenoid winding
  • Corroded or loose actuator connector

Symptoms

  • Check engine light
  • Rough idle
  • Reduced engine performance

Diagnostic focus

Do not confuse P0020 with the bank 2 exhaust actuator code P0023. The A actuator is normally the intake cam; confirm the manufacturer diagram before unplugging or replacing either solenoid.

Can I keep driving with P0020?

Severity: Medium Arrange diagnosis promptly and avoid heavy loads. Stop the engine for timing-chain rattle, an oil-pressure warning, severe roughness, or a flashing check engine light; towing is safer than risking a timing failure.

If the check engine light is flashing or the car runs badly, stop driving and have it checked.

Typical fixes

  • Confirm the A actuator location for this engine
  • Inspect its plug and harness for oil contamination or damage
  • Test supply, control circuit, and solenoid resistance against factory specifications

Related codes

P0021
"A" Camshaft Position - Timing Over-Advanced or System Performance (Bank 2)P0023
"B" Camshaft Position Actuator Circuit (Bank 2)P0024
"B" Camshaft Position - Timing Over-Advanced or System Performance (Bank 2)

Sources & review

Definitions and diagnostic background checked 2026-11-06. Generic guidance, not a substitute for the service procedure for your exact year, engine, and transmission.