P1175 — ESO - Engine Shut Off Solenoid Fault

OBD2 code P1175 flags a problem with the sensor and actuator circuits (ESO - engine shut off solenoid fault). The car is usually drivable while you plan the repair. Common culprits: open or shorted wiring in the circuit, corroded, loose or damaged connector, blown fuse feeding the circuit.

For Ford vehicles

banks 1 and 2 suspect HO2S or cam control diesel

powertrain (engine/transmission)

Is it safe to drive?

Short-term driving is OK In most cases the car remains drivable, possibly with reduced performance or a disabled auxiliary system. If symptoms include stalling, no-start or brake/steering warnings, treat it as urgent.

How to diagnose with an OBD scanner

Read the code and freeze frame Connect an OBD2 scanner, confirm P1175 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
Check for companion codes and TSBs Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the ESO - engine shut off solenoid for damage, corrosion, chafing or poor contact.
Subsystem check Measure reference voltage, ground and signal continuity at the component connector.
Subsystem check Wiggle-test the harness while watching the signal in live data — dropouts reveal broken wires.
Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P1175 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for P1175 (parts and labor, USD, independent shop rates): Repair wiring or connectors: $80–$250; Replace the faulty sensor or actuator: $150–$500; Control module repair: $300–$1,000. Overall, fixing P1175 usually costs between $80 and $1,000. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Common questions

Will P1175 clear itself?

Sometimes P1175 clears after a few drive cycles if the fault was intermittent — for example a loose connector or a tank of bad fuel. The underlying cause usually remains, so the code tends to return. Clear it once; if it comes back, diagnose rather than erase it repeatedly.

What is the most common cause of P1175?

The most common causes are: open or shorted wiring in the circuit, corroded, loose or damaged connector, blown fuse feeding the circuit.

What does OBD2 code P1175 mean?

How much does it cost to fix P1175?

Repair wiring or connectors — $80–$250; Replace the faulty sensor or actuator — $150–$500; Control module repair — $300–$1,000. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.

Is it safe to drive with P1175?

In most cases the car remains drivable, possibly with reduced performance or a disabled auxiliary system. If symptoms include stalling, no-start or brake/steering warnings, treat it as urgent.

P1175 – Engine Shut Off Solenoid Fault

When the powertrain control module detects a problem with the engine shut off solenoid circuit, it logs OBD2 code P1175. This component plays a role in how the engine manages its shutdown process — when you turn the key to the off position, the solenoid helps interrupt fuel delivery or spark to stop the engine cleanly. If the control module sends a command to this solenoid and the electrical response doesn't match what it expects, P1175 gets stored in the system's memory.

This trouble code doesn't trigger the check engine light after a single odd reading. The module runs multiple verification checks under specific operating conditions before it confirms the fault and illuminates the MIL. That's why the freeze frame data saved alongside P1175 matters — it records engine load, RPM, coolant temperature, and vehicle speed at the exact moment the fault was detected. You can use those numbers to recreate the scenario during your diagnostic work and confirm whether the problem reappears.

Most vehicles store this code in the powertrain group because the affected circuit directly influences engine operation. The severity varies depending on which exact component within the ESO circuit has failed, but the underlying issue is always electrical — either the module isn't receiving the right signal back from the solenoid, or it's detecting an abnormal voltage condition on the wire.

Symptoms of P1175

The check engine light is the most obvious sign that P1175 has set. Beyond that, drivers typically notice one or more of the following:

The engine may enter a reduced-power limp mode, particularly if the solenoid controls a function the PCM deems critical for safe operation.
The affected circuit can work intermittently or stop functioning altogether — you might hear the solenoid click inconsistently or not at all.
Fuel economy sometimes climbs because the engine runs less efficiently when the shut-off circuit isn't behaving correctly.
In some cases, the vehicle may stall when attempting to shut down, or fail to restart cleanly.
Other stored codes often accompany P1175, pointing to related circuits that share grounds or power supplies with the engine shut off solenoid.

Common Causes of P1175

Electrical problems account for every P1175 failure. The root cause usually falls into one of these categories:

A poor or corroded ground connection at the solenoid or control module prevents proper circuit completion.
An open or shorted wire somewhere in the ESO harness breaks the signal path or feeds incorrect voltage to the module.
Damaged, loose, or corroded connectors create high resistance or intermittent contact in the circuit.
The engine shut off solenoid itself has failed internally and no longer responds to commands.
The control module's driver circuit for the solenoid output has malfunctioned, preventing proper command execution.

How to Diagnose P1175

A systematic approach keeps you from replacing good parts. Follow these steps in order:

Hook up an OBD2 scanner, confirm P1175 is present, and record all freeze frame data before doing anything else. This snapshot tells you what conditions triggered the fault.
Pull any additional trouble codes and note which module stored them. Related codes on the same circuit often reveal the actual problem. Also search for technical service bulletins for your specific make, model, and model year — some P1175 issues have factory-documented fixes or PCM software updates.
Inspect the wiring and connectors tied to the engine shut off solenoid. Look for cracked insulation, chafing from nearby brackets, corrosion buildup, and any pins that aren't fully seated in the connector housing.
Check for proper reference voltage and ground at the solenoid connector with a multimeter. Compare your readings to what the service manual specifies for that circuit.
Perform a wiggle test on the harness while monitoring live data from the affected sensor or actuator. Any signal dropouts point to broken wires hidden inside the insulation.
After addressing whatever you found, clear the code and run a complete drive cycle that includes the conditions captured in the freeze frame. Only clear P1175 as resolved if it doesn't return.

Repair Options and Costs

Not every P1175 fix requires expensive parts. Work through the cheapest possibilities first:

Wiring harness repair or connector replacement — $80–$250
Engine shut off solenoid replacement — $150–$500
Control module diagnosis and repair or replacement — $300–$1,000

Prices reflect typical U.S. independent shop labor and parts rates. The final bill hinges entirely on which component caused the fault.

In most cases, total repair costs for P1175 land somewhere between $80 and $1,000. An accurate diagnosis before you buy anything saves money — the most expensive scenario is rarely where you should start looking.

Can You Drive with P1175?

Short term, most vehicles stay drivable with this code stored. You may experience slightly reduced performance or notice that a particular auxiliary system doesn't work properly. However, if the underlying fault causes stalling, prevents the engine from restarting, or triggers warnings related to braking or steering, treat it as urgent and address it immediately.