P2370

What it means

An open circuit is detected on the control line for the second fuel volume regulator (B) used on twin high-pressure-pump diesel systems. Without this regulator the high-pressure pump cannot meter fuel for its assigned cylinder bank, leading to rail-pressure faults and limp-home behaviour.

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 in harness or connector to regulator B

  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 P2370 diagnosis, causes & costs
• How to read check engine light codes
• Is it safe to drive with the light on?