Code result
P26EB
Alternative Fuel Control Module System Voltage
Moderate severity
What it means
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?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Weak battery sags voltage under load
mediumA plausible cause — test and verify before replacing parts.
Alternator output out of regulation
mediumA plausible cause — test and verify before replacing parts.
Related help
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