P1120 1998 Ford F150 Code - Throttle Position Sensor Out of Range
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
- P1120 1998 Ford F150 indicates Throttle Position Sensor Out of Range.
- 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.
Code P1120 1998 Ford F150 Description
• 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
What are the Possible Causes of the DTC P1120 1998 Ford F150?
- Faulty throttle position sensor
- Throttle position sensor harness is open or shorted
- Throttle position sensor circuit poor electrical connection
- Throttle position sensor not properly adjusted
How to Fix the DTC P1120 1998 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 P1120 1998 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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Frequently Asked Questions about P1120 1998 Ford F150 Code
1. What does the OBDII code P1120 mean on a 1998 Ford F150?
P1120 indicates that the Throttle Position Sensor (TPS) is reading values outside the expected range set by the engine control module (ECM).
2. What are the symptoms of a P1120 code on a 1998 Ford F150?
Common symptoms include rough idling, poor acceleration, stalling, erratic throttle response, and an illuminated check engine light.
3. What causes the P1120 code on a 1998 Ford F150?
Potential causes include a faulty Throttle Position Sensor, damaged wiring or connectors, or a problem with the ECM receiving or interpreting TPS signals.
4. Can I drive my 1998 Ford F150 with a P1120 code?
While it may still drive, it's not recommended. Poor throttle response or stalling could create unsafe driving conditions, so it should be repaired as soon as possible.
5. How do I diagnose the P1120 code on a 1998 Ford F150?
Start by inspecting the TPS and its wiring for damage or loose connections. Use a multimeter to test the TPS voltage and compare it to manufacturer specifications.
6. What tools are needed to fix the P1120 code on a 1998 Ford F150?
You may need a multimeter, OBDII scanner, basic hand tools, and possibly a replacement TPS.
7. How do I fix the P1120 code on a 1998 Ford F150?
The most common fix is replacing the Throttle Position Sensor. Ensure all wiring and connectors are in good condition and securely connected before installation.
8. How much does it cost to repair a P1120 code on a 1998 Ford F150?
Replacing a TPS typically costs $50–$150 for parts, with labor adding $50–$100 if done by a mechanic.
9. Can a dirty throttle body cause a P1120 code on a 1998 Ford F150?
Yes, a dirty throttle body can cause inaccurate TPS readings, leading to the P1120 code. Cleaning the throttle body may resolve the issue.
10. Will resetting the check engine light fix the P1120 code on a 1998 Ford F150?
Resetting the light won't fix the underlying problem. If the issue isn't addressed, the code will likely return.
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