Intake Valve Control Solenoid Circuit High

What it means

P0077 is stored when the engine control module measures a voltage in the Intake Valve Control Solenoid circuit above the expected maximum, typically because the signal wire is shorted to battery voltage or the circuit is open and pulled up internally.

This entry is compiled automatically from the standard definition and typical diagnostic practice for this type of fault. A detailed, reviewed article is in preparation.

Symptoms

• Check engine light on
• Rough or unstable idle
• Hesitation or poor acceleration
• Increased fuel consumption
• Possible limp mode with reduced power

Common causes

1. Damaged, chafed or corroded wiring in the Intake Valve Control Solenoid circuit
2. Corroded, loose or water-damaged connector terminals
3. Failed Intake Valve Control Solenoid component (sensor, solenoid or actuator)
4. Poor ground connection for the module or component
5. Faulty control module driver (rare, confirm all else first)

How to diagnose

1. Read freeze frame data and note when the code set (cold start, under load, after rain)
2. Inspect the Intake Valve Control Solenoid connector for bent pins, corrosion and water; wiggle the harness with the engine running and watch live data
3. Measure supply voltage and ground at the connector with the key on
4. Check the signal wire for shorts to ground or battery and for continuity to the control module
5. Test or substitute the Intake Valve Control Solenoid only after wiring and connectors are confirmed good
6. Clear the code and complete a drive cycle to confirm the repair

Related codes

Nearby codes in this group

• P0076Intake Valve Control Solenoid Circuit Low
• P0078Exhaust Valve Control Solenoid Circuit
• P0075Intake Valve Control Solenoid Circuit
• P0079Exhaust Valve Control Solenoid Circuit Low
• P0074Ambient Air Temperature Sensor Circuit Intermittent
• P0080Exhaust Valve Control Solenoid Circuit High
• P0073Ambient Air Temperature Sensor Circuit High
• P0081Intake Valve Control Solenoid Circuit