What is P1238 : Engine Error code Causes Explained
This Guide discusses the P1238 fuel pump secondary circuit failure engine problem code. This DTC can affect engine performance, fuel efficiency, starting, and drivability.
How to Identify a DTCs Number
The Diagnostic Trouble Code (DTC) P1238 typically refers to a fuel pump secondary circuit fault. To identify the P1238 code, connect an OBD-II scanner to your vehicle’s diagnostic port, retrieve the trouble codes, and check for any additional related codes.
Understand, this trouble codes (DTCs) are 5 characters: 1 letter, 4 numbers. P-Powertrain indicates the fault code’s location. Generic or manufacturer-specific codes are indicated by the first digit. The second digit denotes the subsystem (7=transmission). The last two numbers describe the issue.
This error occurs when the Powertrain Control Module (PCM) detects an abnormal voltage or resistance in the fuel pump secondary circuit.
Causes of P1238 Code:
- Fuel pump:
The fuel pump driver module has detected a problem with the fuel pump secondary circuit. - Injector:
The injector fuse may be faulty, or the wiring to and from the injector may be damaged.
The injector may also need to be replaced. - EGR:
The exhaust gas recirculation (EGR) valve may be faulty. Cleaning the EGR may help.
Risk Level of P1238 Error Code:
A high-risk level means it could lead to engine stalling, poor performance, or failure to start.
When facing a P1238 code along with by a “High Risk Level” warning, it’s essential to take immediate action.
Common Car Brands Affected by P1238 Code:
The P1238 engine error code is commonly found in the following list.
- Ford
- Nissan
- Chevy
- Toyota
Video: P1238 Engine Error code
FAQ’s
What is the P1238 error code?
The P1238 code indicates a Fuel Pump Secondary Circuit Malfunction, meaning the Powertrain Control Module (PCM) has detected an issue with the fuel pump’s electrical circuit.
What causes the P1238 error?
Common causes include a failing fuel pump, damaged wiring, a faulty fuel pump relay, or issues with the PCM.
What is the risk level of the P1238 code?
The risk level is high, as it can lead to fuel delivery problems, causing poor engine performance, stalling, or difficulty starting.
Which vehicles are affected by the P1238 code?
This code is common in Ford, Nissan, Chevy and Toyota vehicles, particularly those with electronic fuel pump control systems.