What it means
The control module detects a circuit-high condition in the Bank 1 exhaust valve control solenoid circuit.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
How it works
The bank 1 exhaust valve control solenoid is an electrically operated actuator in the system that controls exhaust-valve operation. The control module monitors its circuit, and this code sets when it detects a voltage higher than expected, which can result from a short to battery power or a circuit fault.
Common causes
Most likely first.
- Wiring shorted to battery
- Connector pins corroded - high contact resistance
- Supply wire pinched against B+ source
Symptoms
- Check engine light on
- Rough running or reduced engine performance
- Poor fuel economy
How to diagnose it
- Record freeze-frame data and scan for related valve-control codes to see when the bank 1 exhaust solenoid circuit fault occurred.
- Inspect the bank 1 exhaust valve solenoid connector and harness for corrosion, loose pins, damaged insulation, or contact with a power wire.
- Use the manufacturer's wiring information to identify the solenoid power and control circuits, then check for an unintended short to power.
- Test the solenoid coil and circuit continuity against the manufacturer's specification, with the circuit safely isolated as directed.
- If the wiring and solenoid pass, check the control-module output using the manufacturer's diagnostic procedure.
Common fixes
- Repair a bank 1 solenoid wire shorted to power or damaged by pinching.
- Clean or repair corroded or loose terminals at the bank 1 exhaust solenoid connector.
- Replace the bank 1 exhaust valve control solenoid if it fails electrical testing.
- Repair a confirmed control-module driver fault after checking the circuit and solenoid.
Can I keep driving?
Limit driving to gentle trips if the engine runs smoothly, since incorrect exhaust-valve control can cause rough running or reduced performance. Avoid heavy loads and stop if the engine begins misfiring or loses power substantially.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.