Code result
P26C7
Exhaust Flow Control Valve A Control Circuit High
Moderate severity
What it means
Voltage on the exhaust flow control valve A control line is above the expected window. The exhaust control valve modulates exhaust backpressure or routing (EGR feed, sound, regen support); a malfunction shifts torque mapping and may trigger limp mode.
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 solenoid coil
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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