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Home / DTC / P0080 — Exhaust Valve Control Solenoid Circuit High Bank 1

P0080 — Exhaust Valve Control Solenoid Circuit High Bank 1

Detailed page for trouble code P0080.

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Code

P0080

Generic P — Powertrain

Exhaust Valve Control Solenoid Circuit High Bank 1

Brand: Generic
Type: P — Powertrain
Views: UK: 11 EN: 23 RU: 33
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Page language: EN

Causes

  • Short to battery voltage on the exhaust valve solenoid circuit (Bank 1)
  • Open or shorted wiring or connector (Bank 1 solenoid)
  • Failed exhaust valve control solenoid (stuck, internal short)
  • Faulty PCM/ECM driver or internal electronics
  • Corroded/loose connector or poor pin contact
  • Aftermarket equipment or incorrect previous repairs affecting the circuit

Symptoms

  • Malfunction Indicator Lamp (MIL) or check engine light illuminated
  • Reduced engine performance or limp-home mode
  • Rough idle, hesitation or stalling under some conditions
  • Unusual exhaust noise or change in exhaust flow when valve should operate
  • Possible increase in emissions or failed emissions test

What to check

  • Read freeze frame and live data with a capable scan tool; note when the code set and related freeze-frame parameters
  • Check for other related codes (wiring, supply rail, PCM faults) that could indicate shared circuits
  • Visually inspect harness and connector for Bank 1 exhaust valve solenoid for damage, corrosion, or melted insulation
  • Back-probe the solenoid connector and measure voltage with key ON/engine OFF and during commanded operation
  • Measure solenoid coil resistance with the harness disconnected
  • Perform wiggle tests while monitoring live data or voltage to reproduce the fault

Signal parameters

  • Expected coil resistance (typical): ~5–50 ohms (varies by manufacturer) — compare to spec
  • Quiescent voltage at solenoid harness (key ON, engine OFF): near battery voltage (feed), PCM driver may be open
  • Commanded operation: PCM typically switches the circuit to ground or uses PWM; expect switching between ~0 V and battery voltage
  • PWM duty when active: 0–100% depending on command; frequency commonly in the tens to low hundreds of Hz
  • Expected current draw: generally

Diagnostic algorithm

  1. Retrieve DTC, freeze frame, and related codes with a scan tool. Note conditions when fault occurred.
  2. Visually inspect wiring and connector for Bank 1 exhaust valve solenoid. Repair obvious damage or corrosion before further testing.
  3. With harness disconnected, measure solenoid coil resistance and compare to spec. Replace solenoid if out of range or open/shorted.
  4. Back-probe the solenoid connector with key ON (engine OFF): measure supply voltage and driver status. There should be a stable feed voltage and the PCM side should switch or modulate ground when commanded.
  5. Command the exhaust valve on/off with a scan tool while monitoring voltage/current. If voltage remains high (above expected), check for short to battery on the driver side or PCM fault.
  6. If voltage is high with solenoid disconnected, inspect wiring for a short to battery (use a wiring diagram to isolate circuits). Repair wiring/open circuit as needed.
  7. If wiring checks OK and the solenoid is good, check PCM output driver. Verify whether the PCM is sourcing or sinking incorrectly. If PCM is suspected, confirm with manufacturer guidance before replacement.
  8. After repair or replacement, clear codes and perform test drive under the same conditions to confirm the fault does not return.
  9. If intermittent, monitor with data logger for extended driving cycles to ensure reliability.

Likely causes

  • Damaged insulation with wire contacting battery supply or a fused feed
  • Corroded terminal causing intermittent high readings
  • Defective solenoid coil with internal short to supply
  • PCM output transistor failed and forcing voltage onto circuit
  • Connector pushed together incorrectly or pin bent

Fault status

⚠️ Status
Exhaust Valve Control Solenoid Circuit High — Bank 1. Electrical fault detected: circuit voltage higher than expected (possible short to battery, wiring fault, or driver/PCM issue).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

P0081 P2004 P2006 P0028 P0029
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