P0122 1999 Ford F150 Code - Throttle Position Sensor Circuit Low Input
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
- P0122 1999 Ford F150 indicates Throttle Position Sensor Circuit Low Input .
- 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 P0122 1999 Ford F150 Description
Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sensor. This sensor controls engine operation such as fuel cut. On the other hand, the Wide open and closed throttle position switch, which is built into the throttle position sensor unit, is not used for engine control.
What are the Possible Causes of the DTC P0122 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 P0122 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
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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0122 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.
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Frequently Asked Questions about P0122 1999 Ford F150 Code
1. What are the common symptoms of OBDII code P0122 in a 1999 Ford F150?
- Common symptoms include poor acceleration, stalling, rough idling, and a decrease in fuel efficiency.
2. What does the OBDII code P0122 indicate in a 1999 Ford F150?
- The code indicates a Throttle Position Sensor Circuit Low Input, meaning the sensor is sending a lower than expected voltage signal to the engine control module.
3. What are the possible causes of OBDII code P0122 in a 1999 Ford F150?
- Possible causes include a faulty throttle position sensor, damaged wiring or connectors in the sensor circuit, or issues with the engine control module.
4. How can I diagnose the Throttle Position Sensor (TPS) in a 1999 Ford F150 to address code P0122?
- You can use a multimeter to test the TPS for proper voltage output according to manufacturer specifications. Inspect the wiring and connectors for any signs of damage.
5. Can a dirty throttle body cause OBDII code P0122 in a 1999 Ford F150?
- Yes, a dirty throttle body can affect the TPS readings and lead to a low input error. Regular maintenance of the throttle body can help prevent this issue.
6. Is it safe to continue driving a 1999 Ford F150 with OBDII code P0122?
- It is not recommended to continue driving with this code as it can lead to poor engine performance and potential safety hazards. It is best to address the issue promptly.
7. How can I reset the OBDII code P0122 in a 1999 Ford F150 after making repairs?
- You can reset the code using an OBDII scanner or by disconnecting the car's battery for a few minutes to clear the error code.
8. Can a DIY enthusiast repair OBDII code P0122 in a 1999 Ford F150?
- Depending on your skill level and access to tools, you may be able to replace the throttle position sensor or repair wiring issues yourself. However, it is recommended to consult a professional if unsure.
9. Will OBDII code P0122 cause the check engine light to illuminate in a 1999 Ford F150?
- Yes, the code will trigger the check engine light to illuminate on the dashboard of the vehicle to alert the driver of a potential issue with the throttle position sensor.
10. How long does it typically take to repair OBDII code P0122 in a 1999 Ford F150?
- The repair time can vary depending on the exact cause of the issue. Simple fixes like replacing the throttle position sensor may take around 1-2 hours, while more complex wiring repairs could take longer.
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