Code Definition

P1252 — Pressure Regulator Control Solenoid Valve No. 2 Circuit Malfunction

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Kia

About P1252

P1252 is a manufacturer-specific powertrain diagnostic trouble code recorded for Kia vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P1252 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

P1252 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The pressure regulator control solenoid valve number 2 is a second electrically operated valve the Engine Control Module (ECM) uses to regulate fuel pressure in the high pressure fuel system. The ECM drives the solenoid with a switched or pulse width modulated signal and monitors the circuit for correct electrical operation. DTC P1252 sets when the ECM detects a malfunction in the number 2 solenoid control circuit, such as an open, a short, or current draw outside the expected range. This is usually caused by a wiring fault, a connector problem, or a failed solenoid coil rather than the ECM. W...

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