Engine-Codes - Gmc - P1220 GMC

P1220 GMC - Throttle Position Sensor 2 Circuit

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3  What is this?
Table of contents

P1220 GMC Possible Causes

  • Faulty Throttle Position (TP) Sensor
  • Throttle Position (TP) Sensor harness is open or shorted
  • Throttle Position (TP) Sensor circuit poor electrical connection

How is the P1220 GMC code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

What is the cost to diagnose the P1220 GMC code

Labor: 1.0

The cost to diagnose the P1220 GMC code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

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

P1220 GMC Meaning

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.

More Information

Need more information on how to fix the P1220 GMC code?
Get Access to Factory Service Manuals

Need more help?

Get the P1220 Gmc code diagnosed by a professional: Find a repair shop in your area