P1175 Engine Shut Off Solenoid Circuit Malfunction
The P1175 code indicates a fault in the Engine Shut Off (ESO) solenoid circuit. This solenoid controls fuel supply to allow or stop engine operation. When the PCM detects an out-of-range signal, open circuit, or short circuit in the ESO solenoid circuit, it sets this diagnostic trouble code. The solenoid may be located on the fuel injection pump or in the fuel supply system, depending on the vehicle application.
01. Most Common Causes
- Faulty or stuck ESO solenoid
- Damaged, corroded, or loose wiring or connectors in the solenoid circuit
- Short to ground or voltage in the solenoid wiring
- Open circuit in the wiring between the PCM and the solenoid
- Internal PCM failure (less common)
- Mechanical issues with the solenoid actuation mechanism
02. Symptoms You Will Notice
- Engine may not start or stalls unexpectedly
- Reduced engine performance or no-start condition
03. Step-by-Step Diagnosis
Scan for additional codes and check freeze frame data
Visually inspect the ESO solenoid and its wiring for damage, corrosion, or loose connections
Test the solenoid resistance and compare to manufacturer specifications
Check for voltage and ground at the solenoid connector with the ignition on
Perform a continuity test between the PCM and solenoid to detect open or short circuits
1. Frequently Asked Questions
Is it safe to drive?▼
No, it is not safe to drive. The engine may stall unexpectedly, leading to a loss of power steering and brake assist, which can cause an accident.
How much does it cost to fix?▼
Repair costs typically range from $200 to $600, depending on whether the solenoid itself needs replacement or if wiring repairs are needed.