P0077

Symptoms

• Unstable idle
• Reduced engine power
• Increased fuel consumption
• Check Engine Light Illuminates
• Difficulty starting the engine
• Engine knocking or knocking

Causes

• Faulty VVT solenoid bank 1
• Short circuit in solenoid wiring
• Broken or damaged wires
• Faulty solenoid connector
• Contaminated engine oil or low oil level
• Engine ECU malfunction
• Circuit Grounding Problems

How to Fix

1. Check the level and condition of the engine oil, replace if necessary
2. Inspect the VVT solenoid connector for corrosion or damage.
3. Check the integrity of the wiring from the ECU to the solenoid
4. Measure VVT solenoid resistance (usually 6-30 ohms)
5. Check the solenoid supply voltage (should be 12V)
6. Replace faulty VVT solenoid
7. Clean or replace connectors if necessary
8. Reset error codes and take a test drive

Related codes

Error P0077 by Vehicle Brand