OBD-II code · Powertrain (generic)
P0077 Intake Valve Control Solenoid Circuit High Bank 1
Intake valve solenoid bank 1 control voltage above expected range. Short to power or open ground. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Is it safe to drive with P0077?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyWiring shorted to battery
- Less likelyConnector pins corroded - high contact resistance
- Less likelySupply wire pinched against B+ source
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–3 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Intake Valve Solenoid, Solenoid Wiring
Related codes
- P0083Intake Valve Control Solenoid Circuit High Bank 2
- P0074Ambient Air Temperature Sensor Circuit A Intermittent/Erratic
- P0075Intake Valve Control Solenoid Circuit Bank 1
- P0076Intake Valve Control Solenoid Circuit Low Bank 1
- P0078Exhaust Valve Control Solenoid Circuit Bank 1
- P0079Exhaust Valve Control Solenoid Circuit Low Bank 1
- P007ACharge Air Cooler Temperature Sensor Circuit Bank 1
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.