OBD Fuel Pressure Regulator B Solenoid Supply Voltage Control Circuit/Open
What it means
P233D stands for Fuel Pressure Regulator B Solenoid Supply Voltage Control Circuit/Open. P233D is a P code, so the fault sits in the engine, transmission and emissions systems. For P233D, the second digit places it in ignition and misfire. For P233D, work through the cause list below, cheapest checks first.
Where it lives
For P233D, the circuit described runs through the solenoid. The description of P233D reports the solenoid as open.
What to check first
For P233D, check the wiring and connector on this circuit first, since a broken terminal gives the same reading as a failed part.
Check these first
- P233D: Failing ignition coil, spark plug, or spark plug wire
- P233D: Faulty crankshaft or camshaft position sensor
- P233D: Wiring or connector damage in the ignition circuit
- P233D: Low compression or engine mechanical wear
- P233D: Incorrect ignition timing or a stretched timing chain
What to do next
P233D belongs to the ignition and misfire system. These are the general steps for P233D, and the exact cause on your vehicle can differ.
- P233D: Read misfire counts and freeze frame data with an OBD-II scanner
- P233D: Test spark output and inspect spark plugs and coils
- P233D: Check crankshaft and camshaft position sensor signals while cranking
- P233D: Swap suspect ignition parts between cylinders to see if the fault moves
- P233D: Compression test if the issue persists on the same cylinder
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Updated
Generic SAE J2012 definition. Last updated 2026-08-30.