[SOLVED] P1221 Code: Throttle Position Sensor 1-2 Correlation – How To Fix It!

The automobile fault code P1221 indicates a problem with the Throttle Position (TP) Sensor.

This can be identified by the Engine Light or Service Engine Soon Warning Light turning on. The cause of this fault code could be a faulty TP sensor, an open or shorted TP sensor harness, or a poor electrical connection in the TP sensor circuit.

To fix this issue, it is important to visually inspect the wiring harness and connectors, checking for any damage or corrosion. Additionally, look for any broken, bent, pushed out, or corroded pins in the connectors.

The repair time for this issue is estimated to be around 1.0.

It is crucial to address this fault code promptly to ensure optimal performance and avoid further damage to the vehicle.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level10.0 (Out of 10)

When the engine light is on or the service engine soon warning light is illuminated, it could be a sign of the p1221 fault code.

  • The symptoms of the automobile fault code P1221 include the Engine Light being ON or the Service Engine Soon Warning Light being illuminated.

The automobile fault code p1221 can be caused by a faulty Throttle Position (TP) Sensor, an open or shorted TP Sensor harness, or a poor electrical connection in the TP Sensor circuit.

  • The fault code P1221 can be caused by a faulty Throttle Position (TP) Sensor, an open or shorted Throttle Position (TP) Sensor harness, or a poor electrical connection in the Throttle Position (TP) Sensor circuit.

To fix the p1221 fault code, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.

  • To fix the automobile fault code P1221, follow these steps: 1.
  • Check the possible causes mentioned above.
  • 2.
  • Visually inspect the wiring harness and connectors related to the fault code.
  • 3.
  • Look for any damaged components.
  • 4.
  • Check for broken, bent, pushed out, or corroded pins in the connectors.
  • The estimated repair time for this fix is 1.0 hour.

The factors influencing the diagnosis and fixing cost of automobile fault code P1221 are the estimated repair time of 1.0 hour and the average hourly rate charged by auto repair shops, which ranges between $75 and $150.

The P1221 fault code refers to a problem with the Throttle Position (TP) Sensor in the Throttle Actuator Control (TAC) assembly. This sensor consists of two individual throttle position sensors housed together. It uses two separate signal circuits, a low reference circuit, and a 5-volt reference circuit to connect to the TAC module.

As the throttle opens, the TP sensor signal voltage increases. The signal circuit for the TP sensor is pulled up to a 5-volt reference voltage.

The P1221 code specifically indicates a correlation issue between Throttle Position Sensor 1 and Throttle Position Sensor 2.

What are the possible causes of the automobile fault code P1221?

If you see the engine light or service engine soon warning light on, the fault code P1221 could be the culprit. This code is often caused by a faulty throttle position (TP) sensor, an open or shorted TP sensor harness, or a poor electrical connection in the TP sensor circuit. To fix the issue, visually inspect the wiring harness and connectors, checking for any damage or corrosion. Also, look out for broken, bent, pushed out, or corroded connector pins.

How can I visually inspect the wiring harness and connectors to fix the P1221 fault code?

If you’re dealing with the P1221 fault code and your engine light is on, it’s time to take a closer look at the wiring harness and connectors. This code is often caused by a faulty Throttle Position (TP) Sensor or issues with the TP Sensor harness. To fix it, visually inspect the wiring harness and connectors for any signs of damage. Check for broken, bent, pushed out, or corroded pins on the connectors. Don’t forget to also check for any damaged components.

What should I look for when checking for damaged components and connector’s pins to resolve the P1221 fault code?

If you’re dealing with a P1221 fault code, start by checking for damaged components and connector’s pins. This code is often caused by a faulty Throttle Position (TP) Sensor or issues with the TP Sensor harness. To resolve the problem, visually inspect the wiring harness and connectors, paying close attention to any signs of damage. Look out for broken, bent, pushed out, or corroded connector’s pins. By identifying and addressing these issues, you can effectively fix the P1221 fault code.

p1221 error fault code explained

If your engine light is on and you’re seeing the P1221 fault code, it could be due to a faulty Throttle Position (TP) Sensor or issues with the sensor’s wiring. To fix this, visually inspect the wiring harness and connectors for any damage. Also, check for broken, bent, pushed out, or corroded connector pins.

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