P0027 medium Severity

P0027: Exhaust Valve Control Solenoid Circuit Range/Performance (Bank 1)

Can lead to reduced engine performance, rough idle, decreased fuel economy, and may affect emissions compliance

Overview

OBD-II P0027 indicates the exhaust valve control solenoid (VVT) circuit on bank 1 is operating outside expected performance or range, often due to solenoid failure, wiring issues, low/dirty oil, or actuator problems

Common Symptoms

  • Illuminated check engine light (CEL)
  • Reduced engine power or poor acceleration
  • Increased fuel consumption
  • Rough or unstable idle

Most Common Causes

Faulty exhaust valve control solenoid high

Solenoid not responding or signal out of expected range triggers the code

Wiring harness or connector issues high

Open, shorted, corroded, or loose connections in the solenoid circuit

Low or contaminated engine oil medium

VVT solenoid operation depends on clean correct level oil

Camshaft actuator mechanical failure medium

Internal mechanical binding can impair valve timing operation

Faulty ECM/PCM or calibration mismatch low

Rare causes include control module driver circuit issues or incorrect programming

Diagnostic Steps

  1. Connect OBD-II scan tool and verify P0027 is present; check for related codes such as P0026, P0028, P0029
    Expected: Code present and any related codes identified
    Interpretation: Verify code validity and collect context
  2. Inspect engine oil level and condition
    Expected: Oil at proper level, clean and meeting spec
    Interpretation: Low or dirty oil can affect VVT solenoid performance
  3. Visually inspect solenoid wiring and connectors for damage, corrosion, or loose pins
    Expected: No visible harness issues
    Interpretation: Defects here commonly cause circuit performance faults
  4. Measure solenoid resistance and voltage with multimeter against manufacturer specs
    Expected: Resistance and voltage within spec
    Interpretation: Out-of-range values indicate solenoid or circuit faults
  5. Monitor live VVT data during engine run using scan tool
    Expected: Solenoid operation responds to PCM commands
    Interpretation: Lack of response supports solenoid/circuit failure

Repair Solutions

Replace exhaust valve control (VVT) solenoid medium
Estimated Cost: $200 - $600

Most common repair when solenoid internal fault exists

Repair/replace wiring and connectors in solenoid circuit medium
Estimated Cost: $100 - $300

Corrosion or open/short repairs vary by vehicle

Engine oil and filter change easy
Estimated Cost: $50 - $150

Helpful if oil condition contributed to VVT issues

Camshaft actuator or VVT assembly repair hard
Estimated Cost: $400 - $1200

Required if mechanical binding or failure present

ECM reflash or replacement hard
Estimated Cost: $500 - $1500

Only if confirmed ECM driver fault or calibration issue

Common Misdiagnoses

Avoid these common diagnostic mistakes:

  • Assuming only a sensor failure without checking wiring and oil condition
  • Blaming ECM without verifying solenoid and actuator operation

Frequently Asked Questions

What does a P0027 diagnostic trouble code signify?

The P0027 code stands for Exhaust Valve Control Solenoid Circuit Range/Performance (Bank 1). This generally indicates an issue with the Engine Mechanical system.

How serious is the P0027 code?

The P0027 code is considered medium severity. Can lead to reduced engine performance, rough idle, decreased fuel economy, and may affect emissions compliance

Common signs of the P0027 error code

You may experience the following: Illuminated check engine light (CEL), Reduced engine power or poor acceleration, Increased fuel consumption.

What parts fail when P0027 is set?

The most common causes are: Faulty exhaust valve control solenoid, Wiring harness or connector issues, Low or contaminated engine oil.

Estimated repair costs for different causes of P0027

Repair costs depend on the specific failure. A simple Engine oil and filter change replacement is relatively affordable ($50-$150), whereas a ECM reflash or replacement repair is more expensive, potentially reaching $1500.

Does code P0027 apply to Ford vehicles?

Yes, P0027 is a generic code that applies to all OBD-II compliant vehicles, including Ford, Toyota, Honda, Chevrolet, Nissan, Dodge, BMW, and more.

User Comments (0)

Share your experience or ask a question about this code.

Be the first to share your experience with P0027!