P0077 moderate

Intake Valve Control Solenoid Circuit High (Bank 1)

The P0077 code means the vehicle's onboard diagnostic system has detected: Intake Valve Control Solenoid Circuit High (Bank 1). This is a moderate severity code.

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Keep driving?: Short distances only
DIY difficulty: hard
Estimated cost: $80 - $400 (parts and labor)

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Common Symptoms

Check Engine Light illuminated
Engine idles roughly especially when warm
Loss of power at certain RPM ranges
Possible ticking noise from valve train

Probable Causes (Ranked by Likelihood)

Open circuit in VVT solenoid wiring Very High
Failed VVT solenoid (open coil) High
Disconnected or damaged connector Moderate
PCM driver circuit fault (open) Low

Step-by-Step Diagnostic Procedure

Measure VVT solenoid resistance. An open reading (infinite ohms) confirms a burned-out solenoid coil.
Check the connector is fully seated on the solenoid. Look for backed-out pins or corrosion.
Test wiring continuity from the PCM connector to the solenoid connector. Repair any open circuits.
With a known-good solenoid, command it on with a scan tool and verify oil pressure change to the VVT actuator.

Common Fixes by Vehicle

What techs usually find when diagnosing P0077 on specific vehicles — tap your vehicle for the fix and the exact part:

2003-2011 Honda Accord/Element 2.4L K24 Easy DIY

Bank 1 intake VTC solenoid circuit high — usually an internal short to power inside the solenoid. Replace the VTC oil control valve. Inspect the 2-pin connector for pushed-back terminals which can intermittently short to the valve cover.

Labor: 45 min

Common fix part Honda VTC Oil Control Valve 15810-RAA-A03 View on Amazon→ Compare fitment at PartsGeek→

2006-2015 Honda Civic/CR-V 1.8L/2.4L Easy DIY

Intake VTC high-side circuit fault — diagnose with DVOM across the solenoid pins (should be 6.7-7.5 ohms at 68F). Any resistance above 10 ohms means replace the solenoid. Also inspect for chafed wires near the power steering reservoir bracket.

Labor: 30-45 min

Common fix part Honda VTC Oil Control Valve (Civic/CR-V) View on Amazon→ Compare fitment at PartsGeek→

2009-2014 Honda Pilot/Odyssey 3.5L with VCM Moderate DIY

Intake OCV high-circuit fault on VCM-equipped J35 — frequently a wiring issue where the harness rubs against the intake manifold. Repair or replace the sub-harness and use fresh dielectric grease at the connector.

Labor: 1 hr

Common fix part Honda VTC Actuator Solenoid 15810-RCA-A03 View on Amazon→ Compare fitment at PartsGeek→

Frequently Asked Questions

What does circuit high mean on P0077?

Circuit high means the PCM sees a voltage above the expected range. For the VVT solenoid, this typically means an open circuit where current cannot flow through the solenoid.

Will P0077 cause engine damage?

Not immediately, but prolonged driving without proper VVT function can increase wear on the timing chain and related components. Have it repaired within a week.

Can an oil change fix P0077?

No, P0077 specifically indicates an electrical circuit problem. Unlike P0011 or P0012 which can be oil-related, this code requires an electrical repair.