Code result
P2B5B
Engine Coolant Flow Control Valve Control Circuit High
Moderate severity
What it means
The engine coolant flow control valve reports a control circuit high condition. Coolant routing between engine and radiator branches cannot be commanded as expected.
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
Control wire shorted to B+
highOne of the most commonly reported causes for this code — check this first.
Open valve motor
mediumA plausible cause — test and verify before replacing parts.
Connector pins corroded - high contact resistance
lowLess common, but worth ruling out after the more likely causes.
Related help
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