What Does P0080 Mean?
This code indicates the ECM has detected a high voltage or short-to-power condition on the exhaust VVT oil control solenoid circuit for bank 1. The control circuit voltage remains above the expected threshold, indicating an open solenoid coil, short to battery voltage in the wiring, or an ECM driver failure. The exhaust camshaft timing will default to a fixed position, degrading engine performance and increasing emissions.
Common Causes
35%
Open circuit in the exhaust VVT solenoid coil winding, often caused by thermal degradation from proximity to exhaust components
25%
Short-to-power in the solenoid control wire contacting a fused voltage source in the harness
20%
Open or high-resistance ground connection preventing current flow through the solenoid circuit
15%
Disconnected or backed-out solenoid connector with an open circuit at the plug
5%
Failed ECM driver transistor for exhaust VVT control (open circuit failure mode)
Diagnostic Steps
1
Disconnect the exhaust VVT solenoid and measure coil resistance. Normal specification is 6.5-8.5 ohms at 68°F (20°C). OL (open/infinite) confirms the solenoid coil has failed.
2
With the solenoid disconnected, measure voltage on the control wire at the harness side. It should be near battery voltage (12-14V) with key on. If present with the solenoid disconnected, check for a short-to-power by disconnecting at the ECM end.
3
Verify all ECM ground connections are clean, tight, and have less than 0.5 ohms resistance to battery negative.
4
Inspect the solenoid connector for proper engagement. Verify the lock tab is intact and terminals are fully seated. Check for spread or corroded pins.
5
If wiring and solenoid test normal, command the solenoid on/off with a scan tool while monitoring voltage at the ECM control pin. Failure to toggle indicates an ECM driver problem.
Estimated Repair Cost
$75 - $400
Parts + labor, varies by vehicle and location
This code indicates the ECM has detected a high voltage or short-to-power condition on the exhaust VVT oil control solenoid circuit for bank 1. The control circuit voltage remains above the expected threshold, indicating an open solenoid coil, short to battery voltage in the wiring, or an ECM driver...
The most common cause of P0080 (Exhaust Valve Control Solenoid Circuit High (Bank 1)) is: Open circuit in the exhaust VVT solenoid coil winding, often caused by thermal degradation from proximity to exhaust components
Typical repair costs for P0080 range from $75 to $400, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Fixed exhaust valve timing reduces engine efficiency and power output. While not directly dangerous, the loss of power during demanding driving situations should be considered.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0080 to identify the root cause.
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Quick Info
Category
Powertrain
System
Variable Valve Timing (VVT) System
Difficulty
Type
Generic (SAE)
Recommended Tools
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