Code result
P26D8
Engine Coolant Pump Clutch Stuck On
Moderate severity
What it means
The coolant pump clutch remains engaged when commanded off. Pump runs continuously, slowing warm-up and increasing parasitic load.
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
Armature plate seized to the pulley face
highOne of the most commonly reported causes for this code — check this first.
Driver stuck on keeps clutch energised
mediumA plausible cause — test and verify before replacing parts.
Carbon or debris buildup preventing free movement
lowLess common, but worth ruling out after the more likely causes.
Related help
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