Code result
P233C
Fuel Pressure Regulator C Control Circuit High
Moderate severity
What it means
Same as P233A but with the control line shorted to supply - the ECU measures a high voltage that does not match the commanded duty cycle.
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 line shorted to battery or supply
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.
Supply wire pinched against B+ source
lowLess common, but worth ruling out after the more likely causes.
Related help
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