Possible CausesĮrror Code P1237 can be caused by multiple problems. In other vehicle makes, the engine may not start at all. The most common symptom and usually the only symptom for this error code is the activation of the Check Engine light and the registration of the error code. The PCM then sets the error code to the DTC and activate the Check Engine light to notify the driver of the problem. The FPDM indicates to the PCM (powertrain control module, also known as ECM or engine control module in other vehicles makes) through the FPM (fuel pump monitor) circuit to highlight the detected concern. Error Code P1237 takes place when the FPDM has determined a problem in the fuel pump secondary circuit. We also recommend replacing the fuel pump. The check valve is built into the fuel pump and the fuel pump will have to be replaced. When the fuel drains back, your fuel pump has to pump the fuel back to the engine from the fuel tank which will cause a crank no start. The FPDM or Fuel Pump Driver Modules control the voltage to the Fuel Pump to help keep proper fuel pressure throughout the operating range of the engine. This check valve stops fuel from draining back to the fuel tank from the engine.
Specifications on the definition, troubleshooting, and repairs, of course, vary from one make and model to another. This error code is a generic trouble, meaning it applies to all vehicles equipped with OBD-II system, especially vehicles made since 1996 up to present. Spectra Premium fuel pump driver modules provide a reliable and accurate voltage control to ensure the fuel pump supplies the optimal fuel pressure during. This code happens when the fuel pump driver module has determined a problem in the fuel pump secondary circuit. Error Code P1237 is defined as Fuel Pump Secondary Circuit Fault.
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