Toggle Side Panel

Shopping Cart

No products in the basket.

Shopping Cart

No products in the basket.

Close search
Home / DTC / P0077 — Intake Valve Control Solenoid Circuit High Bank 1

P0077 — Intake Valve Control Solenoid Circuit High Bank 1

Detailed page for trouble code P0077.

33,852codes
59brands
11,391generic
22,461specific
All codes P-codes (Powertrain) B-codes (Body) C-codes (Chassis) U-codes (Network/User) Tesla Alerts
Reset
Code

P0077

Generic P — Powertrain

Intake Valve Control Solenoid Circuit High Bank 1

Brand: Generic
Type: P — Powertrain
Views: UK: 15 EN: 31 RU: 19
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Short to battery voltage on the intake valve control solenoid harness (Bank 1)
  • Failed/shorted intake VVT/IVC solenoid (Bank 1)
  • Damaged, corroded or loose connector or pins at solenoid or ECM
  • Open or shorted wiring between solenoid and ECM (insulation chafing, broken conductor)
  • Faulty ECM/PCM internal driver (less common)
  • Engine oil issues (very dirty oil or low pressure) causing solenoid to stick or fail

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Reduced engine performance or rough idle
  • Poor fuel economy
  • Possible engine hesitation or stumble under load
  • Possible limp-home mode or reduced torque (on some vehicles)

What to check

  • Read and record freeze-frame and all related trouble codes with a scan tool; note engine conditions when DTC set
  • Visual inspection of harness and connectors at intake VVT solenoid Bank 1 for damage, corrosion, oil contamination or loose pins
  • Check engine oil level and condition—very dirty oil can impair solenoid operation
  • Backprobe solenoid connector with ignition ON and engine OFF to verify supply voltage and control signal
  • Measure solenoid coil resistance at the connector (unplugged) and compare to specification
  • Wiggle test wiring while engine running or while commanding solenoid to see if code/operation changes

Signal parameters

  • Typical coil resistance (varies by design): approx. 6 - 35 ohms (check OEM spec for exact value)
  • Supply voltage: battery voltage present on the power feed (approx. 12 V) with key ON
  • Control signal: PCM provides a switched/grounded PWM or switched ground; command voltage on control pin typically 0–12 V pulses (duty cycle 0–100%)
  • Idle/activation frequency: control pulses often low frequency up to a few tens of Hz (varies by vehicle)
  • Expected idle/park condition: control line should be at or near 0 V (ground) or be pulsed low; high-steady voltage on control line is not expected

Diagnostic algorithm

  1. Confirm DTC: Clear code(s) and reproduce. Record freeze-frame data and any related DTCs (camshaft/cylinder bank codes).
  2. Visual inspection: Check harness and connector at intake VVT solenoid Bank 1 for damage, oil, bent pins, corrosion, or poor retention.
  3. Check oil: Verify oil level and condition; change if extremely dirty or beyond service interval and retest.
  4. Connector voltage check: With ignition ON (engine OFF) backprobe the solenoid connector. Verify power feed (should be battery voltage) and check control terminal for abnormal high voltage.
  5. Coil resistance: Disconnect solenoid and measure coil resistance to ground/positive per OEM spec. Replace solenoid if out of spec or shows short to case.
  6. Command test: Use a scan tool to actuate the intake VVT solenoid while observing connector voltage and engine response. Watch for PWM duty changes and waveform abnormalities with a scope if available.
  7. Wiring continuity: With battery disconnected, check continuity between solenoid connector and ECM connector for shorts to power, shorts to ground, and open circuits. Repair any damaged wiring.
  8. Isolate by substitution: If another identical solenoid (same engine bank) is available, swap to see if code follows the solenoid.
  9. ECM check: If wiring and solenoid check good and replaced if necessary, consider ECM driver failure—verify with manufacturer procedures before ECM replacement.
  10. Verify repair: After repair, clear codes and road test under conditions that previously caused the code. Re-scan for return of DTC.

Likely causes

  • Damaged solenoid coil with low resistance or internal short
  • Wire rubbed through to a constant 12V feed (short-to-voltage)
  • Poor connector connection introducing abnormal voltage readings
  • Faulty ground or fused power supply feeding the solenoid
  • ECM output driver fault

Fault status

⚠️ Status
Intake valve control solenoid circuit high (Bank 1). ECM detected voltage higher than expected on the intake VVT solenoid circuit for bank 1. Inspect solenoid, wiring, connectors, power/ground, and ECM driver.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-3 hours

Similar codes

P0010 P0011 P0012 P0013 P0014 P0020
Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email

Report

Harassment or bullying behavior
Contains mature or sensitive content
Contains misleading or false information
Contains abusive or derogatory content
Contains spam, fake content or potential malware

Block Member?

Please confirm you want to block this member.

You will no longer be able to:

  • See blocked member's posts
  • Mention this member in posts
  • Invite this member to groups
  • Message this member
  • Add this member as a connection

Please note: This action will also remove this member from your connections and send a report to the site admin. Please allow a few minutes for this process to complete.

Report

You have already reported this .