AutoCodes – Ford – P0197 1997 Ford F150

P0197 1997 Ford F150 Code - Engine Oil Temperature Sensor Circuit Low Input

Quick Answer

The engine oil temperature sensor is used to detect the engine oil temperature. Common causes include Faulty Engine Oil Temperature sensor, Engine Oil Temperature sensor harness is open or shorted, Engine Oil Temperature sensor 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: P0197 1997 Ford F150 indicates Engine Oil Temperature Sensor Circuit Low Input .
Common causes: Common causes include Faulty Engine Oil Temperature sensor, Engine Oil Temperature sensor harness is open or shorted, Engine Oil Temperature sensor 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 2,451

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0197 1997 Ford F150 Description

The engine oil temperature sensor is used to detect the engine oil temperature. The sensor modifies a voltage signal from the Engine Control Module (ECM). The modified signal returns to the ECM as the engine oil temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.

OBDII Code P0197 1997 Ford F150 - Engine Oil Temperature Sensor Circuit Low Input - AutoCodes.com — P0197 1997 Ford F150 Code - Engine Oil Temperature Sensor Circuit Low Input

What does this mean?

What are the Possible Causes of the DTC P0197 1997 Ford F150?

Faulty Engine Oil Temperature sensor
Engine Oil Temperature sensor harness is open or shorted
Engine Oil Temperature sensor circuit poor electrical connection
Damaged PCM

How to Fix the DTC P0197 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

Indicates Engine Oil Temperature (EOT) signal voltage is low (high temperature)

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0197 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.

Need more information about the P0197 1997 Ford F150 code?

Need more information on how to fix the P0197 1997 Ford F150 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0197 1997 Ford F150 code diagnosed by a professional: Find a repair shop in your area

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 P0197 1997 Ford F150 Code

1. What does the OBDII code P0197 mean on a 1997 Ford F150?

The P0197 code indicates that the Engine Oil Temperature (EOT) sensor is reporting a lower voltage than expected, suggesting a low input condition in the sensor circuit.

2. What are common symptoms of code P0197 in a 1997 Ford F150?

Symptoms may include the Check Engine Light coming on, higher engine temperatures, decreased fuel efficiency, and potentially rough engine operation if the oil temperature is indeed too low.

3. What could cause the P0197 code to appear on a 1997 Ford F150?

Possible causes include a faulty EOT sensor, damaged wiring or connectors in the EOT sensor circuit, or an actual low oil temperature condition due to external factors like cold weather.

4. How can I troubleshoot the P0197 code in my 1997 Ford F150?

Start by inspecting the EOT sensor and its wiring for any visible damage or disconnections. Check the sensor's resistance with a multimeter, and compare it to manufacturer specifications. Itâ€™s also advisable to check the engine oil level and quality, as low or dirty oil can contribute to the issue.

5. What steps should be taken to fix the P0197 code in a 1997 Ford F150?

Depending on the diagnosis, repair may involve replacing the EOT sensor, repairing damaged wiring, or addressing any issues with the engine oil such as changing it if it is degraded.

6. Is it safe to drive my 1997 Ford F150 with the P0197 code?

While you can drive for a short distance, it's important to address the issue soon. Driving with potential engine oil temperature issues can lead to engine damage.

7. How do I reset the P0197 code on my 1997 Ford F150?

After the necessary repairs have been made, you can clear the code with an OBD-II scan tool. However, if the underlying issue isnâ€™t fixed, the code is likely to return.

8. What tools are needed to diagnose the P0197 code on a 1997 Ford F150?

You will need an OBD-II scanner to read the code and monitor the EOT sensor data, a multimeter for electrical testing, and basic hand tools for accessing the sensor.