P0077
Intake Valve Control Solenoid Circuit High Bank 1
P0077 is an OBD-II diagnostic trouble code meaning: Intake Valve Control Solenoid Circuit High Bank 1. Common causes: faulty vvt solenoid bank 1, short circuit in solenoid wiring. Estimated repair cost: $33–167.
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
- Check the level and condition of the engine oil, replace if necessary
- Inspect the VVT solenoid connector for corrosion or damage.
- Check the integrity of the wiring from the ECU to the solenoid
- Measure VVT solenoid resistance (usually 6-30 ohms)
- Check the solenoid supply voltage (should be 12V)
- Replace faulty VVT solenoid
- Clean or replace connectors if necessary
- Reset error codes and take a test drive
Related codes
Error P0077 by Vehicle Brand
FAQ
What does the P0077 code mean?
P0077 is an OBD-II diagnostic trouble code that indicates: Intake Valve Control Solenoid Circuit High Bank 1
What causes a P0077 error code?
The most common causes of P0077 include: Faulty VVT solenoid bank 1; Short circuit in solenoid wiring; Broken or damaged wires; Faulty solenoid connector.
How do I fix a P0077 diagnostic trouble code?
To fix P0077: Check the level and condition of the engine oil, replace if necessary. Inspect the VVT solenoid connector for corrosion or damage.. Check the integrity of the wiring from the ECU to the solenoid. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0077?
Limited driving only, diagnose soon
How much does it cost to fix P0077?
The estimated repair cost for P0077 is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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