P233E — Fuel Pressure Regulator B Solenoid Supply Voltage Control Circuit Low
The supply line that powers the solenoid of fuel pressure regulator B is below the expected voltage with the regulator commanded active - typically a high-resistance feed, partial short to ground or weak relay contact.
General code reference. Confirm the definition and diagnostic procedure for your vehicle's year, model and engine. A stored code alone does not identify a failed part.
Affected components
- Fuel pressure regulator b
- Regulator b supply relay
Possible causes to check
These are possible checks, not a ranked diagnosis. Follow the vehicle manufacturer's test procedure before replacing parts.
- Supply feed has high contact resistance
- Partial short to ground on supply line
- Connector pins corroded - high contact resistance
Possible symptoms
- Check engine light on
- Hard start, no start, or stalling under load
- Power loss especially at high load or rpm
- Possible long cranking time
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
Related codes
Sources
Check each reference's vehicle and model-year scope. General background links do not establish which fault is most likely on your vehicle.
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.