Powertrain
generic / SAE
P25BE
Alternative Fuel Disable Control Circuit / Open
The controller cannot drive the alternative-fuel disable line that switches a bi-fuel vehicle (CNG, LPG, hydrogen) back to gasoline. An open detected on the control side blocks the safety shutoff for the gas system.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / BE
Possible causes
- Broken wire or corroded connector on the disable control line high
- Open coil in the alt-fuel disable relay medium
- Output driver in the alt-fuel control module faulty low
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 120–600 €
- Estimated time: 0.8–2.5 h
- Component: alt fuel control module
- Component: alt fuel disable relay
- Component: wiring harness
- MIL / check engine light
Sources
References
sae:J2012