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Engine-Codes – Generic – P0077

P0077 Code - Intake Valve Control Solenoid Circuit High Bank 1

Quick Answer

The OBD-II trouble code P0077 indicates a problem with the intake valve control solenoid circuit on Bank 1 of the engine. Common causes include Faulty intake valve control solenoid, Wiring issues in the solenoid circuit, Electrical problems, such as a short or open circuit. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0077 indicates Intake Valve Control Solenoid Circuit High Bank 1.
Common causes
Common causes include Faulty intake valve control solenoid, Wiring issues in the solenoid circuit, Electrical problems, such as a short or open circuit.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P0077 Description

The OBD-II trouble code P0077 indicates a problem with the intake valve control solenoid circuit on Bank 1 of the engine. This code specifically relates to a high voltage condition in the circuit, which can affect the operation of the intake valve control solenoid. The intake valve control solenoid is responsible for controlling the flow of air into the engine, which is crucial for proper combustion and overall engine performance.

OBDII Code P0077 - Intake Valve Control Solenoid Circuit High Bank 1
P0077 Code - Intake Valve Control Solenoid Circuit High Bank 1

Common Causes of P0077

  1. Faulty intake valve control solenoid.
  2. Wiring issues in the solenoid circuit.
  3. Electrical problems, such as a short or open circuit.
  4. Corrosion or poor connections in the wiring harness.
  5. Engine control module (ECM) malfunction.

Symptoms of P0077

  1. Reduction in engine power and acceleration.
  2. Decreased fuel efficiency.
  3. Rough engine operation or intermittent stalling.
  4. Illumination of the Check Engine Light.

How to Fix P0077

  1. Begin by diagnosing the specific cause of the high voltage condition in the intake valve control solenoid circuit using a diagnostic scanner.
  2. Inspect the wiring harness and connections for any signs of damage, corrosion, or poor connections, and repair or replace as needed.
  3. Test the intake valve control solenoid for proper operation and replace if found to be faulty.
  4. Clear the trouble code from the ECM memory and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnosis may be required to identify any underlying issues with the ECM or other related components.

Cost to Fix P0077

The typical repair costs for addressing the P0077 code can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, the cost for parts and labor to resolve this problem can range from $200 to $500. However, it is important to note that actual costs may vary based on factors such as location, vehicle make and model, and the rates of the auto repair shop. Diagnostic time and labor rates typically range from $80 to $150 per hour, with rates potentially higher at dealerships or in metropolitan areas, and lower at independent shops. It is advisable to obtain a detailed estimate from a qualified mechanic to determine the precise cost for repairing the intake valve control solenoid circuit issue.

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Code P0077 Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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