Code result
P2266
Water in Fuel Sensor A Circuit Low
High severity
What it means
The water-in-fuel sensor at the diesel fuel filter reads below lower plausibility — short to ground. The sensor warns the driver to drain the filter when condensate accumulates.
Is it safe to drive?
No — stop driving
This code points to a problem that can cause damage or affect safety. Avoid driving and have the vehicle diagnosed promptly.
Most likely causes
Short to ground
highOne of the most commonly reported causes for this code — check this first.
Connector pins corroded - high contact resistance
lowLess common, but worth ruling out after the more likely causes.
Harness chafing through insulation
lowLess common, but worth ruling out after the more likely causes.
Related help
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