OBD-II code · Powertrain (generic, extended)
P26EB Alternative Fuel Control Module System Voltage
The alternative fuel control module reports a system voltage out of operating range. CNG, LPG, or hydrogen fuelling can be disabled until voltage is in spec.
Is it safe to drive with P26EB?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- PossibleWeak battery sags voltage under load
- PossibleAlternator output out of regulation
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.8–3.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Alt Fuel Control Module, Charging System
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.