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P1221 Buick Code - Throttle Position Sensor 1- 2 Correlation

- Code Popularity: 4,181 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P1221 Buick?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Throttle Position (TP) Sensor
  • Throttle Position (TP) Sensor harness is open or shorted
  • Throttle Position (TP) Sensor circuit poor electrical connection
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How to Fix the DTC P1221 Buick?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1221 Buick code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P1221 Buick Description

The Throttle Position (TP) Sensor is mounted on the throttle body of the Throttle Actuator Control (TAC) assembly. The sensor is actually 2 individual throttle position sensors within 1 housing. Two separate signal circuits, a low reference circuit, and a 5-volt reference circuit are used in order to connect the TP sensor assembly and the TAC module. The TP sensor signal voltage increases as the throttle opens. The signal circuit for TP sensor is pulled up to 5-volt reference voltage.

OBDII Code P1221 Buick - Throttle Position Sensor 1- 2 Correlation - AutoCodes.com
P1221 Buick Code - Throttle Position Sensor 1- 2 Correlation

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Code P1221 Buick comments

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