AutoCodes – Ford – P0597 1997 Ford F150

P0597 1997 Ford F150 Code - Thermostat Heater Control Circuit Failure

Quick Answer

The Engine Control Module (ECM) controls the Pulse Width Modulated (PWM) thermostat. Common causes include Failed Engine Cooling Thermostat, Engine Cooling Thermostat harness is open or shorted, Engine Cooling Thermostat circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0597 1997 Ford F150 indicates Thermostat Heater Control Circuit Failure .
Common causes: Common causes include Failed Engine Cooling Thermostat, Engine Cooling Thermostat harness is open or shorted, Engine Cooling Thermostat circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 2,004

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 27, 2024

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0597 1997 Ford F150 Description

The Engine Control Module (ECM) controls the Pulse Width Modulated (PWM) thermostat. The engine coolant thermostat heater controls coolant flow and regulates the engine operating temperature. The ECM supplies 12 V to the thermostat. The ECM controls the engine coolant thermostat heater by grounding the control circuit with a solid state device called a driver. The driver is equipped with a feedback circuit that is pulled-up to a voltage. The ECM can determine if the control circuit is open, shorted to ground, or shorted to a voltage by monitoring the feedback voltage.

OBDII Code P0597 1997 Ford F150 - Thermostat Heater Control Circuit Failure - AutoCodes.com — P0597 1997 Ford F150 Code - Thermostat Heater Control Circuit Failure

What does this mean?

What are the Possible Causes of the DTC P0597 1997 Ford F150?

Failed Engine Cooling Thermostat
Engine Cooling Thermostat harness is open or shorted
Engine Cooling Thermostat circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P0597 1997 Ford F150?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

If there are no coolant system leaks, replace the thermostat to fix the problem.
The Comprehensive component monitor (CCM) monitors the THTRC circuit to the Powertrain Control Module (PCM) for high and low voltage. If during testing; voltage was to fall below a calibrated limit for a calibrated amount of time the test will fail and set the DTC and MIL.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0597 1997 Ford F150 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0597 1997 Ford F150 Code

1. What does the OBDII code P0597 for a 1997 Ford F150 indicate?

The code P0597 on a 1997 Ford F150 indicates a thermostat heater control circuit failure.

2. What are some common symptoms of a P0597 error code in a 1997 Ford F150?

Common symptoms of a P0597 code in a 1997 Ford F150 may include engine overheating, poor fuel efficiency, and the vehicle's heater not working properly.

3. What are possible causes of the P0597 code in a 1997 Ford F150?

Possible causes of a P0597 code in a 1997 Ford F150 include a faulty thermostat, a malfunctioning thermostat heater, wiring issues, or a defective engine coolant temperature sensor.

4. How can I diagnose a P0597 code in my 1997 Ford F150?

Diagnosing a P0597 code in a 1997 Ford F150 involves using an OBDII scanner to retrieve the code, checking the thermostat and its connections, inspecting the wiring for any damage, and testing the engine coolant temperature sensor.

5. Can I still drive my 1997 Ford F150 with a P0597 error code?

It is not recommended to drive your 1997 Ford F150 with a P0597 code as it can lead to engine overheating and other potential issues. It's best to address the problem promptly.

6. How do I repair a P0597 code in my 1997 Ford F150?

To repair a P0597 code in a 1997 Ford F150, you may need to replace the thermostat, thermostat heater, or engine coolant temperature sensor, and repair any damaged wiring or connections.

7. Are there any DIY tips for fixing a P0597 code on a 1997 Ford F150?

If you have experience with automotive repairs, you can attempt to replace the thermostat, thermostat heater, or engine coolant temperature sensor yourself. However, it's recommended to consult a professional if you're unsure.

8. How much does it cost to fix a P0597 code on a 1997 Ford F150?

The cost of fixing a P0597 code on a 1997 Ford F150 can vary depending on the exact cause of the issue and whether you do the repairs yourself or take your vehicle to a mechanic. Costs may include parts and labor.

9. Will resetting the error codes make the P0597 code in my 1997 Ford F150 go away?

Resetting the error codes may temporarily clear the P0597 code, but if the underlying issue causing the code is not addressed, it is likely to reappear. It's important to diagnose and fix the root cause of the problem.

10. How long does it take to repair a P0597 code on a 1997 Ford F150?

The repair time for a P0597 code on a 1997 Ford F150 can vary depending on the specific issue and the expertise of the person performing the repairs. It may take a few hours to a full day to complete the necessary repairs.