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Engine-Codes – Ford – P0122 1997 Ford F150

P0122 1997 Ford F150 Code - Throttle Position Sensor Circuit Low Input

Quick Answer

The P0122 diagnostic trouble code (DTC) for a 1997 Ford F150 indicates a Throttle Position Sensor (TPS) Circuit Low Input. Common causes include Faulty Throttle Position Sensor, Damaged wiring or connectors in the TPS circuit, Corrosion or poor electrical connections. 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
P0122 1997 Ford F150 indicates Throttle Position Sensor Circuit Low Input .
Common causes
Common causes include Faulty Throttle Position Sensor, Damaged wiring or connectors in the TPS circuit, Corrosion or poor electrical connections.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code P0122 1997 Ford F150 Description

The P0122 diagnostic trouble code (DTC) for a 1997 Ford F150 indicates a Throttle Position Sensor (TPS) Circuit Low Input. The TPS is a crucial component of the vehicle's fuel management system, as it monitors the position of the throttle valve and sends this information to the engine control module (ECM). The ECM uses this data to determine the appropriate air-fuel mixture for optimal engine performance. When the ECM detects a low input signal from the TPS, it triggers the P0122 code, indicating a potential issue with the TPS circuit.

OBDII Code P0122 1997 Ford F150 - Throttle Position Sensor Circuit Low Input
P0122 1997 Ford F150 Code - Throttle Position Sensor Circuit Low Input

Common Causes of P0122 1997 Ford F150

  1. Faulty Throttle Position Sensor
  2. Damaged wiring or connectors in the TPS circuit
  3. Corrosion or poor electrical connections
  4. Malfunctioning Engine Control Module (ECM)
  5. Environmental factors such as moisture or debris affecting the TPS

Symptoms of P0122 1997 Ford F150

  1. Rough idling or stalling
  2. Poor acceleration or throttle response
  3. Engine misfires
  4. Decreased fuel efficiency
  5. Check Engine Light illuminated

How to Fix P0122 1997 Ford F150

  1. Begin by diagnosing the issue using a scan tool to retrieve the trouble codes and perform a thorough inspection of the TPS and its circuit.
  2. Test the TPS using a multimeter to check for proper voltage and resistance values. Replace the TPS if it fails the test.
  3. Inspect the wiring and connectors for any damage, corrosion, or poor connections. Repair or replace any faulty components as needed.
  4. Clear the trouble codes from the ECM using the scan tool and perform a test drive to ensure the issue has been resolved.
  5. If the problem persists, further diagnostics may be required to identify any underlying issues with the ECM or other related components.

Cost to Fix P0122 1997 Ford F150

The typical repair costs for addressing a P0122 code on a 1997 Ford F150 can range from $100 to $300, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, with hourly rates typically ranging between $80 and $150. Factors such as location, vehicle make and model, and engine type can also influence the final repair costs. For a more accurate estimate, it's recommended to consult with a local auto repair shop.

What does this mean?

Tech Notes for P0122 1997 Ford F150

The TP sensor circuit is monitored by the PCM for a low TP rotation angle (or voltage) input through the comprehensive component monitor (CCM). If during key ON engine OFF or key ON engine running the TP rotation angle (or voltage) changes below a minimum calibrated limit, the test fails.



Fault exhibits a symptom of limited power. A TP PID (TP VPID) reading less than 3.42% (0.17 volt) in key ON engine OFF, continuous memory or key ON engine running indicates a hard fault.

When is the Code Detected?

The Throttle Position Sensor (TPS) signal 1 circuit has reported an open or low voltage

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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 P0122 1997 Ford F150 Code

1. What are the common symptoms of OBDII code P0122 in a 1997 Ford F150?

- Common symptoms include poor acceleration, stalling, rough idling, and reduced fuel efficiency.

2. What does the P0122 code on a 1997 Ford F150 indicate?

- The P0122 code indicates a Throttle Position Sensor Circuit Low Input error.

3. What are the possible causes of the Throttle Position Sensor Circuit Low Input error in a 1997 Ford F150?

- Possible causes include a faulty throttle position sensor, damaged wiring or connectors, or issues with the vehicle's electronic control module.

4. How can I diagnose the cause of the P0122 code in my 1997 Ford F150?

- A thorough inspection of the throttle position sensor, wiring, and connectors is necessary. Testing the sensor's voltage and resistance can help pinpoint the issue.

5. Is it safe to continue driving my 1997 Ford F150 with the P0122 code present?

- It is not recommended to drive the vehicle with the P0122 code present, as it can lead to performance issues and potential safety hazards.

6. Can I repair the Throttle Position Sensor Circuit Low Input error in my 1997 Ford F150 myself?

- Depending on your automotive knowledge and skills, you may be able to replace the throttle position sensor or repair wiring issues yourself. However, professional help is recommended for accurate diagnosis and repair.

7. How much does it typically cost to fix the P0122 code in a 1997 Ford F150?

- The cost of repairs for the P0122 code can vary depending on the underlying issue. Replacing a faulty throttle position sensor can cost anywhere from $50 to $200, not including labor.

8. Will resetting the OBDII code temporarily fix the issue in my 1997 Ford F150?

- Resetting the code may temporarily turn off the check engine light, but it will not fix the underlying problem causing the P0122 error.

9. Are there any preventive maintenance tips to avoid the Throttle Position Sensor Circuit Low Input error in my 1997 Ford F150?

- Regularly inspecting and cleaning the throttle body, as well as ensuring proper maintenance of the vehicle's electrical system, can help prevent issues with the throttle position sensor.

10. Can the P0122 code in a 1997 Ford F150 cause long-term damage if left unresolved?

- Ignoring the P0122 code can lead to further damage to the engine and other components, affecting the overall performance and safety of the vehicle. It is important to address the issue promptly.

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