P0020
Fix within a few daysThe engine computer detects an electrical problem with the intake camshaft position actuator circuit on engine bank 2.
Code P0020 means an electrical issue with Bank 2's intake VVT solenoid. Common causes: VVT solenoid (70%), wiring (25%). Drivability: Yes, but fix soon. Repair cost: $50-$200 DIY, $150-$400 professional.
Can I Drive With P0020?
Yes, for short trips only
Essential trips under 10 miles, avoid highways and heavy acceleration
Stop driving immediately if: Flashing CEL, loud engine noises, significant power loss, or engine stalling frequently.
Symptoms of P0020
- 1Check Engine Light is on
- 2Engine runs rough or idles poorly
- 3Reduced engine power or acceleration
- 4Decreased fuel economy
- 5Engine may stall at low speeds
Common Causes of P0020
Parts most likely causing this code, ranked by probability
The solenoid itself has an internal electrical open circuit or is mechanically stuck, preventing proper oil flow to the camshaft phaser.
70% of P0020 cases are fixed by replacing this part
Damaged, corroded, or loose wiring or a faulty connector to the VVT solenoid prevents the correct electrical signal from reaching the solenoid.
25% of P0020 cases are fixed by repairing wiring or connector
A rare internal fault within the engine computer's driver circuit for the VVT solenoid can cause this code.
5% of P0020 cases are fixed by replacing the ECM/PCM
Check These First (Before Buying Parts)
- Check your engine oil level and ensure it is full and clean. Low or dirty oil can indirectly affect VVT operation.
- Visually inspect the electrical connector and wiring going to the VVT solenoid on Bank 2 for any obvious damage, corrosion, or looseness.
How to Diagnose P0020
- 1Check engine oil level and condition; ensure it's full and clean.
- 2Visually inspect the VVT solenoid connector and wiring for any signs of damage, corrosion, or loose connections.
- 3Disconnect the VVT solenoid and test its electrical resistance with a multimeter; compare to factory specifications.
- 4With the engine running, test for proper voltage and ground at the VVT solenoid connector.
- 5If the solenoid and wiring test good, consider further diagnosis of the ECM/PCM, though this is less common.
P0020 on Popular Vehicles
Toyota Camry
2007-2024P0020 on V6 Camry engines frequently indicates a failed VVT solenoid (Oil Control Valve) on Bank 2. These are accessible and a common failure point.
75% fixed by replacing the VVT Solenoid
Honda Accord
2003-2024Honda's VTEC/VTC systems can trigger P0020 due to a faulty oil control valve (VVT solenoid) or issues with the wiring harness leading to it. Bank 2 is typically the rear bank on V6 models.
70% fixed by replacing the VVT Solenoid
Ford F-150
2004-2024Ford's Ti-VCT engines are susceptible to VVT solenoid failures. P0020 on an F-150 often means the Bank 2 intake VVT solenoid has an electrical open, sometimes exacerbated by infrequent oil changes.
65% fixed by replacing the VVT Solenoid
Frequently Asked Questions
What does P0020 mean?
P0020 indicates an electrical circuit problem with the 'A' (intake) camshaft position actuator (VVT solenoid) on engine bank 2. The engine computer is not seeing the correct electrical signal from or to this component.
Can I drive with P0020?
Yes, you can drive with P0020, but you should fix it within a few days. You will experience reduced engine performance, rough idling, and worse fuel economy. Prolonged driving can lead to more significant engine issues.
Will P0020 clear itself?
No, P0020 will not clear itself. This code indicates a hard electrical fault that requires diagnosis and repair. The Check Engine Light will remain on until the underlying issue is resolved and the code is cleared.
How do I fix P0020 myself?
Start by checking your engine oil level and condition. Then, inspect the VVT solenoid's wiring and connector for damage. If those are good, you will likely need to replace the VVT solenoid itself. This usually involves removing a single bolt and pulling the old solenoid out, then installing the new one.
How much does it cost to fix P0020?
The cost to fix P0020 ranges from $50 to $200 for parts if you do it yourself. If you take it to a professional shop, expect to pay between $150 and $400, which includes parts and 1-2 hours of labor.
P0020 keeps coming back - why?
If P0020 keeps returning, it means the initial repair did not address the root cause. Common reasons for recurrence include: a faulty new VVT solenoid, a persistent wiring issue that was overlooked, or a rare ECM/PCM fault. Ensure you checked for proper voltage and ground at the solenoid connector.
Will P0020 fail emissions/smog test?
Yes, P0020 will cause your vehicle to fail an emissions or smog test. The Check Engine Light being on is an automatic failure in most jurisdictions, and the VVT system not functioning correctly impacts emissions.
What's the difference between P0020 and P0021?
P0020 indicates an electrical circuit fault with the VVT solenoid on Bank 2. P0021 indicates a mechanical performance issue, specifically that the intake camshaft on Bank 2 is 'over-advanced' or stuck in an advanced position, often due to low oil pressure, a mechanically stuck solenoid, or timing issues.
P0020 on Toyota Camry
On many Toyota Camry models, especially V6 engines, P0020 often points directly to a faulty VVT solenoid (Oil Control Valve) on Bank 2. These solenoids can fail electrically or become clogged with sludge, leading to the circuit open code.
Questions to Ask Your Mechanic
Did you check the resistance of the VVT solenoid on Bank 2?
Good answer: Yes, I measured the resistance and it was outside the specified range, indicating an internal fault. Or, 'It was within spec, so I moved on to checking the wiring.'
What did you find when testing the wiring and connector to the VVT solenoid?
Good answer: I found a corroded pin in the connector, or 'The wiring harness had a break near the connector,' or 'The wiring and connector tested good for continuity and voltage.'
Repair Cost Estimate
DIY Repair
Parts only
$50-$200
Shop Repair
Parts + labor
$150-$400
Save $100-$200 by doing it yourself
Difficulty
intermediate
Time
1-2 hours
Intermediate - requires basic hand tools and a multimeter for proper diagnosis, but the physical replacement of the solenoid is often simple.
Cost of Waiting
Ignoring P0020 means your engine's variable valve timing system is not functioning correctly on one bank. This leads to continued poor fuel economy, reduced power, and can cause increased wear on engine components over time. A $100 VVT solenoid replacement now prevents potential long-term engine damage.
While You're In There...
The VVT system relies heavily on clean engine oil for proper operation. If your oil is dirty or overdue for a change, replacing it along with the filter is a smart preventative measure.
Tools You'll Need
- Basic hand tools (sockets, wrenches)
- Multimeter
- Engine oil (if low or dirty)
- Torque wrench (optional, for proper solenoid bolt tightening)
P0020 is a common VVT system code. Most repairs involve replacing an accessible solenoid and are straightforward, restoring your engine's performance and efficiency.
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Your Next Steps
Step 1: Check your engine oil level and condition. Ensure it's full and clean. If not, change the oil and filter.
Step 2: Locate the VVT solenoid on Bank 2 (the side of the engine without cylinder #1, usually the passenger side on transverse engines, or the driver's side on longitudinal V-engines). Inspect its electrical connector and wiring for any damage or looseness.
Step 3: If visual inspection doesn't reveal the issue, use a multimeter to test the resistance of the VVT solenoid. If it's outside specifications, replace the solenoid. If it tests good, you'll need to test the wiring for continuity and voltage from the ECM.