What it means
The control circuit of alternative fuel tank shutoff valve E reports a control circuit performance/stuck off condition. Tank isolation cannot be commanded as expected on multi-tank CNG/LPG systems.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
- The engine or gearbox may go into limp mode
How it works
Shutoff valve E isolates tank E in a multi-tank CNG or LPG system when commanded by the control module. This code means the module detects that valve E is not responding as expected and appears stuck off. A mechanically stuck valve, weakened coil force, or debris can prevent it from moving.
Common causes
Most likely first.
- Shutoff valve mechanically stuck closed
- Coil force degraded with age
- Carbon or debris buildup preventing free movement
Symptoms
- Check-engine light
- Alternative-fuel warning light
- Difficulty switching fuel modes
How to diagnose it
- Record freeze-frame data and use a scan tool to see whether the commanded state of valve E changes when the fault occurs.
- Inspect valve E's connector and harness for damage or poor contact that could block the command.
- Check the valve E coil and control circuit against the manufacturer's specification to rule out an electrical fault.
- Use the manufacturer's approved test to verify valve E's response to a command; do not energize it directly unless that procedure allows it.
- If electrical checks pass but the valve remains off, inspect or service it for sticking or internal debris as directed by the manufacturer.
Common fixes
- Restore a loose or damaged valve E electrical connection.
- Repair the valve E control circuit if testing finds an electrical fault.
- Service valve E if an approved inspection confirms sticking or debris.
- Replace valve E if the coil has weakened or the valve cannot move reliably.
Can I keep driving?
Tank E may not respond to isolation commands, affecting fuel switching and tank availability. Follow the vehicle's warnings and stop using alternative fuel if the system indicates that operation is restricted.
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.