P0027
Fix within 1-2 weeksThe engine's computer detected a problem with the exhaust valve timing control solenoid circuit or performance on Bank 1.
Code P0027 means your engine's exhaust valve timing solenoid on Bank 1 has a circuit or performance issue. Common causes: Faulty VVT solenoid (70%), low/dirty oil (20%). Drivability: Yes, safe to drive, but fix soon. Repair cost: $50-$150 DIY, $150-$500 professional.
Can I Drive With P0027?
Yes, safe to drive
No restrictions, but expect reduced performance and fuel economy.
Stop driving immediately if: Flashing Check Engine Light, loud engine noises, significant power loss, or burning smell.
Symptoms of P0027
- 1Reduced engine power
- 2Worse fuel economy
- 3Rough idle
- 4Engine may run louder or make ticking noises
Common Causes of P0027
Parts most likely causing this code, ranked by probability
The solenoid itself is faulty, stuck, or clogged, preventing proper exhaust valve timing adjustment.
70% of P0027 cases are fixed by replacing this part
The variable valve timing system relies on clean engine oil at the correct level and viscosity to operate the solenoid effectively.
20% of P0027 cases are fixed by an oil change or topping off oil
Damaged wires or a corroded electrical connector to the VVT solenoid prevent proper electrical signal transmission.
8% of P0027 cases are fixed by repairing wiring or connectors
A faulty engine computer can incorrectly interpret signals or fail to control the VVT solenoid, though this is very rare.
2% of P0027 cases are fixed by replacing the ECM/PCM
Check These First (Before Buying Parts)
- Check engine oil level and condition. Ensure it's at the full mark and not excessively dirty or sludgy. Use the correct viscosity oil for your vehicle.
How to Diagnose P0027
- 1Check engine oil level and condition. Change oil if dirty or low.
- 2Visually inspect the VVT solenoid's electrical connector and wiring for damage or corrosion.
- 3Test the VVT solenoid's resistance with a multimeter and compare to factory specifications.
- 4If possible, swap the Bank 1 exhaust VVT solenoid with the Bank 2 exhaust VVT solenoid (if accessible and identical) to see if the code moves.
- 5If the solenoid tests good and wiring is fine, check oil pressure and look for internal engine sludge.
P0027 on Popular Vehicles
Toyota Camry
2007-2024Often related to sludge buildup from infrequent oil changes affecting the VVT solenoid. Ensure proper oil viscosity is used.
80% fixed by replacing the VVT solenoid or an oil change
Honda Accord
2003-2024Common for the VVT (VTEC) oil pressure switch or the VVT solenoid itself to fail. Check for oil leaks around the solenoid.
75% fixed by replacing the VVT solenoid
Nissan Altima
2007-2024VVT solenoids (often called 'oil control valves') are a known failure point, sometimes due to internal engine debris. Regular oil changes are critical.
80% fixed by replacing the VVT solenoid or an oil change
Frequently Asked Questions
What does P0027 mean?
P0027 indicates a problem with the exhaust valve timing control solenoid circuit or performance on Bank 1. This solenoid adjusts the exhaust valve timing to optimize engine performance and fuel economy.
Can I drive with P0027?
Yes, you can drive safely, but expect reduced engine performance and fuel economy. Fix this within 1-2 weeks to prevent potential long-term engine issues.
Will P0027 clear itself?
No, P0027 will not clear itself. The underlying issue must be repaired, and then the code can be cleared with an OBD-II scan tool.
How do I fix P0027 myself?
Start by checking your engine oil level and condition. If that's good, locate and inspect the exhaust VVT solenoid on Bank 1. Test its resistance with a multimeter or replace it if it's faulty.
How much does it cost to fix P0027?
DIY cost is $50-$150 for a new VVT solenoid. Professional repair costs $150-$500, including parts and 1-2 hours of labor.
P0027 keeps coming back - why?
The code might return if the root cause wasn't addressed (e.g., dirty engine oil, a wiring issue, or a different VVT component is failing), or if the replacement solenoid is faulty. Always ensure correct oil viscosity and cleanliness.
Will P0027 fail emissions/smog test?
Yes, P0027 will cause your vehicle to fail an emissions or smog test because the Check Engine Light is on, indicating an active fault in the engine's control system.
What's the difference between P0027 and P0028?
P0027 refers to the exhaust valve timing control solenoid on Bank 1 (the side of the engine with cylinder #1), while P0028 refers to the same component but on Bank 2.
P0027 on Toyota Camry?
On many Toyota and Lexus models, P0027 is frequently caused by a clogged or faulty VVT solenoid, often due to infrequent oil changes or using incorrect oil viscosity. Checking oil condition is the first step.
Questions to Ask Your Mechanic
Did you check the engine oil level and condition before diagnosing the VVT solenoid?
Good answer: Yes, the first step was to confirm the oil was at the correct level and clean. We also checked for proper oil pressure.
What were the resistance readings for the Bank 1 exhaust VVT solenoid?
Good answer: The solenoid measured X ohms, which is outside the factory specification of Y-Z ohms, indicating an internal fault.
Repair Cost Estimate
DIY Repair
Parts only
$50-$150
Shop Repair
Parts + labor
$150-$500
Save $100-$350 by doing it yourself
Difficulty
intermediate
Time
1-2 hours
Intermediate. Requires some mechanical aptitude and basic diagnostic steps, but replacing the solenoid itself is often manageable for a DIYer.
Cost of Waiting
Continued driving with P0027 will lead to reduced fuel economy and engine performance. If the issue is due to low or dirty oil, it can cause accelerated wear on engine components, leading to much more expensive repairs like timing chain damage or engine failure. A $100 solenoid fix now prevents a $2,000+ engine repair later.
While You're In There...
If the oil is dirty or low, it's critical to change it when addressing VVT issues, as clean oil is essential for solenoid operation and engine health.
These seals often come with a new solenoid, but confirm. Replacing them prevents oil leaks and ensures a proper seal.
Tools You'll Need
- Basic socket set
- Screwdriver set
- Multimeter (for testing)
- Torque wrench (for proper installation)
- Oil drain pan (if changing oil)
P0027 is a common code related to your engine's variable valve timing system. Most repairs involve replacing an accessible solenoid and are straightforward, restoring your engine's performance and fuel economy.
- Family-owned since 1957
- 990,000+ happy customers
- Fast nationwide shipping
- Easy returns
Your Next Steps
Step 1: Check engine oil level and condition. If low, top it off. If dirty, perform an oil and filter change. Clear the code and retest.
Step 2: If the code returns, locate the exhaust VVT solenoid on Bank 1. Disconnect its electrical connector and inspect for corrosion or damage. Test the resistance of the VVT solenoid with a multimeter.
Step 3: If the solenoid's resistance is outside specifications (check your vehicle's service manual), replace the solenoid. Parts you'll likely need: one VVT solenoid for Bank 1 exhaust.