OBD codes / P0020
P0020
ModerateCamshaft Position Actuator Circuit (Bank 2)
P0020 is usually drivable short-term, but check your oil right away — that alone clears many cases. If it's a worn phaser or timing chain, continued driving can worsen it and hurt performance and economy, so get it diagnosed if oil and the solenoid don't resolve it.
What this code means
Variable valve timing is moved by an actuator (the cam phaser) fed oil through a control solenoid. P0020 flags a problem in that actuator/solenoid circuit on Bank 2 (the cylinder-2 side). The most common and cheapest cause is oil — low, dirty, or wrong-viscosity oil clogging the small passages — followed by a stuck or failing VVT/VCT solenoid or its wiring. Less often it's a worn phaser or stretched timing chain. Start by checking the oil; it resolves many of these.
Symptoms you might notice
- Rough idle or stalling
- Loss of power or hesitation
- Rattle from the engine at start-up
- Reduced fuel economy
- Check-engine light
What it costs to fix
Typical range: $60–$1,500 · about ~0.3–6 hrs of labor
| If the cause is… | Part | Labor |
|---|---|---|
| Oil change (when low/dirty oil is the cause) | $30–$100 | ~0.3–0.6 hrs |
| VVT/VCT solenoid (oil-control valve) | $30–$150 | ~0.5–2 hrs |
| Wiring / connector or phaser | $10–$500 | ~0.5–6 hrs |
The low end assumes oil or a solenoid — the common, modest causes. A wiring fix is cheap; a worn phaser or timing chain is the major, high-end job. Get a chain/phaser repair diagnosed before committing.
The price swings on which cause it turns out to be — so confirm the cause before paying. Diagnose P0020 for my exact vehicle →
Frequently asked
Can I drive with P0020?
Short-term usually yes, but check the oil first. If it's just oil or a solenoid, it's minor; if it's a worn phaser or chain, driving can make it worse. Get it diagnosed if an oil change doesn't clear it.
Can low oil cause P0020?
Yes — the variable-timing actuator runs on oil pressure through small passages, so low, dirty, or wrong-grade oil readily triggers it. An oil change with the correct viscosity is a smart, cheap first step.
Is P0020 the same as P0021?
Related — P0020 is the Bank 2 actuator circuit; P0021 is the Bank 2 timing reading over-advanced. They often share causes (oil, solenoid) and appear together. Both are diagnosed by checking oil, then the solenoid and wiring.
How much does it cost to fix P0020?
From an oil change to a major repair. Oil and solenoid fixes are cheap-to-modest; a phaser or timing chain is a big labor job. Diagnose before assuming the worst.
Seeing P0020 on your car? Get a diagnosis specific to your exact year, make and model.
Diagnose P0020 for my vehicleGeneric OBD-II reference. Manufacturer-specific behavior varies — confirm with a scan tool and, for safety-related codes, a professional inspection.