P1120 1997 Ford F150 Code - Throttle Position Sensor Out of Range
Quick Answer
The P1120 code for a 1997 Ford F150 indicates that the Throttle Position Sensor (TPS) is out of range. Common causes include Faulty Throttle Position Sensor, Damaged or corroded wiring/connectors, 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
- P1120 1997 Ford F150 indicates Throttle Position Sensor Out of Range.
- Common causes
- Common causes include Faulty Throttle Position Sensor, Damaged or corroded wiring/connectors, 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.
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Code P1120 1997 Ford F150 Description
The P1120 code for a 1997 Ford F150 indicates that the Throttle Position Sensor (TPS) is out of range. The TPS is a crucial component of the vehicle's fuel management system, as it monitors the position of the throttle valve and sends signals to the engine control module (ECM) to adjust fuel delivery and ignition timing. When the TPS is out of range, it means that the sensor is providing incorrect data to the ECM, which can lead to various performance issues.
Common Causes of P1120 1997 Ford F150
- Faulty Throttle Position Sensor
- Damaged or corroded wiring/connectors
- Poor electrical connections
- ECM software issue
- Throttle body malfunction
Symptoms of P1120 1997 Ford F150
- Rough idling or stalling
- Hesitation or surging during acceleration
- Poor fuel efficiency
- Check Engine Light illuminated
- Reduced engine performance
How to Fix P1120 1997 Ford F150
- Diagnose the issue by using a scan tool to read the code and check the TPS sensor's voltage output.
- Inspect the TPS wiring and connectors for any damage or corrosion. Repair or replace as necessary.
- Test the TPS sensor's resistance and adjust or replace if out of specifications.
- Clear the code from the ECM memory and perform a test drive to ensure the issue is resolved.
- If the problem persists, consider replacing the TPS sensor or seeking professional assistance for further diagnosis.
Cost to Fix P1120 1997 Ford F150
The typical repair costs for addressing a P1120 code on a 1997 Ford F150 can range from $100 to $300, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's advisable to check local rates for a more precise estimate. Keep in mind that rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less.
Tech Notes for P1120 1997 Ford F150
When is the Code Detected?
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Frequently Asked Questions about P1120 1997 Ford F150 Code
What does the OBD-II code P1120 mean on a 1997 Ford F150?
The P1120 code indicates that the throttle position sensor (TPS) is reporting a voltage reading that is outside the expected range.
What are the common symptoms of P1120 on a 1997 Ford F150?
Symptoms may include poor acceleration, hesitation, engine stalling, rough idling, and the check engine light being illuminated.
What causes the P1120 code on a 1997 Ford F150?
Common causes include a malfunctioning throttle position sensor, damaged wiring or connectors, or a misaligned throttle body.
How do I test the throttle position sensor for P1120 on a 1997 Ford F150?
Using a multimeter, check the TPS voltage output while slowly opening the throttle. The voltage should smoothly increase from around 0.5 volts at idle to about 4.5 volts at wide-open throttle.
Can a faulty TPS cause the engine to go into limp mode?
Yes, a faulty TPS can cause the engine to enter limp mode, limiting performance to protect the engine.
Is it safe to drive with a P1120 code on a 1997 Ford F150?
Driving with this code is not recommended, as it can cause unpredictable throttle response and may lead to unsafe driving conditions.
How do you fix the P1120 code on a 1997 Ford F150?
Repairs may involve replacing the throttle position sensor, repairing damaged wires or connectors, or recalibrating the sensor.
Do I need to reset the ECU after replacing the TPS?
Yes, after replacing the TPS, you should clear the code using an OBD-II scanner and allow the ECU to relearn the sensor's position.
Can dirty throttle components cause the P1120 code?
Yes, carbon buildup or dirt in the throttle body can affect the sensor's readings and trigger this code.
What tools are needed to fix the P1120 code on a 1997 Ford F150?
You’ll typically need a multimeter, an OBD-II scanner, and basic hand tools like screwdrivers and wrenches to inspect and replace the throttle position sensor.
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