P233A

What it means

The ECU detects an open circuit on the control line for the third (C) fuel pressure regulator. Either the regulator solenoid coil is internally open, the harness is broken, or the connector has lost contact - the ECU cannot drive the regulator and rail pressure cannot be controlled by this stage.

Is it safe to drive?

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

• Open circuit in harness or connector

  high

  One of the most commonly reported causes for this code — check this first.

• Regulator solenoid winding open

  medium

  A plausible cause — test and verify before replacing parts.

• Pin pushed back out of connector body

  low

  Less common, but worth ruling out after the more likely causes.

Related help

• Full P233A diagnosis, causes & costs
• How to read check engine light codes
• Is it safe to drive with the light on?