AutoCodesFord – P1125 1999 Ford F150

P1125 1999 Ford F150 Code - Throttle Position Sensor Intermittent

Quick Answer

The Throttle Position Sensor (TPS) responds to the accelerator pedal movement. Common causes include Faulty Throttle Position Sensor, Throttle Position Sensor harness is open or shorted, Throttle Position 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
P1125 1999 Ford F150 indicates Throttle Position Sensor Intermittent.
Common causes
Common causes include Faulty Throttle Position Sensor, Throttle Position Sensor harness is open or shorted, Throttle Position 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 2,402
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Apr 26, 2019
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Code P1125 1999 Ford F150 Description

The Throttle Position Sensor (TPS) responds to the accelerator pedal movement. The TPS is a rotary potentiometer sensor that provides a signal to the Powertrain Control Module (PCM) that is linearly proportional to the throttle plate/shaft position. As the TPS is rotated by the throttle shaft, the following operating conditions are determined by the PCM:
• Closed throttle (includes idle or deceleration)
• Part throttle (includes cruise or moderate acceleration)
• Wide open throttle (includes maximum acceleration or de-choke on crank)
• Throttle angle rate
OBDII Code P1125 1999 Ford F150 - Throttle Position Sensor Intermittent - AutoCodes.com
P1125 1999 Ford F150 Code - Throttle Position Sensor Intermittent

What are the Possible Causes of the DTC P1125 1999 Ford F150?

  • Faulty Throttle Position Sensor
  • Throttle Position Sensor harness is open or shorted
  • Throttle Position Sensor circuit poor electrical connection

How to Fix the DTC P1125 1999 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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1125 1999 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 P1125 1999 Ford F150 code?

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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 P1125 1999 Ford F150 Code

What does the OBDII code P1125 mean on a 1999 Ford F150?

P1125 indicates an intermittent issue with the Throttle Position Sensor (TPS), which helps the engine control module (ECM) monitor throttle input and adjust engine performance.

What are the symptoms of code P1125 in a 1999 Ford F150?

Common symptoms include poor acceleration, hesitation during throttle input, engine stalling, rough idling, and a possible check engine light.

What causes the P1125 code in a 1999 Ford F150?

Possible causes include a faulty Throttle Position Sensor, damaged sensor wiring, loose or corroded electrical connections, or an ECM issue.

Can I drive my 1999 Ford F150 with the P1125 code?

While the truck may still be drivable, it could experience performance problems like hesitation or stalling, which may pose safety risks. It's best to address the issue promptly.

How do I diagnose the P1125 code on my 1999 Ford F150?

Start by inspecting the TPS and its wiring for damage or loose connections. Use a multimeter to test the TPS for proper voltage signals. If no issues are found, the ECM might need further evaluation.

How do I fix the P1125 code in a 1999 Ford F150?

Repairs could include replacing the TPS, repairing or replacing damaged wiring, cleaning corroded connectors, or, in rare cases, reprogramming or replacing the ECM.

How much does it cost to fix a P1125 code on a 1999 Ford F150?

Replacing the TPS typically costs between $100 and $250, including parts and labor. Wiring repairs may vary depending on the extent of the damage.

Can a dirty throttle body cause the P1125 code on a 1999 Ford F150?

While unlikely, a dirty throttle body could indirectly affect throttle operation and should be cleaned if other issues are ruled out.

Do I need to reset the ECM after fixing the P1125 code on my 1999 Ford F150?

Yes, clear the code using an OBDII scanner after completing the repair to ensure the issue is resolved and the check engine light stays off.

What tools do I need to troubleshoot the P1125 code on a 1999 Ford F150?

You'll typically need a digital multimeter, an OBDII scanner, and basic hand tools to inspect and test the TPS and related wiring.

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