AutoCodes – Isuzu – P1220 Isuzu

P1220 Isuzu Code - Throttle Position Sensor 2 Circuit

Quick Answer

The Throttle Position (TP) Sensor is mounted on the throttle body of the Throttle Actuator Control (TAC) assembly. Common causes include Faulty Throttle Position (TP) Sensor, Throttle Position (TP) Sensor harness is open or shorted, Throttle Position (TP) 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: P1220 Isuzu indicates Throttle Position Sensor 2 Circuit.
Common causes: Common causes include Faulty Throttle Position (TP) Sensor, Throttle Position (TP) Sensor harness is open or shorted, Throttle Position (TP) 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.

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Code Popularity 11,032

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 14, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1220 Isuzu 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 P1220 Isuzu - Throttle Position Sensor 2 Circuit - AutoCodes.com — P1220 Isuzu Code - Throttle Position Sensor 2 Circuit

What does this mean?

What are the Possible Causes of the DTC P1220 Isuzu?

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

How to Fix the DTC P1220 Isuzu?

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1220 Isuzu 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.

Need more information about the P1220 Isuzu code?

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

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1220 Isuzu Code

1. What are common symptoms of OBDII code P1220 in an Isuzu related to the Throttle Position Sensor 2 Circuit?

The common symptoms include poor acceleration, rough idling, stalling, and the vehicle going into limp mode.

2. What are the possible causes of OBDII code P1220 in an Isuzu indicating an issue with the Throttle Position Sensor 2 Circuit?

Possible causes include a faulty throttle position sensor, damaged wiring or connectors, issues with the throttle body, or a problem in the engine control module.

3. How can I diagnose the Throttle Position Sensor 2 Circuit issue causing OBDII code P1220 in my Isuzu?

You can use a multimeter to test the throttle position sensor's voltage output, check for any visible damage to the wiring or connectors, and perform a thorough inspection of the throttle body.

4. Can a dirty throttle body cause OBDII code P1220 in an Isuzu?

Yes, a dirty throttle body can disrupt the proper functioning of the throttle position sensor, leading to the triggering of OBDII code P1220.

5. What are some repair tips for resolving OBDII code P1220 in an Isuzu related to the Throttle Position Sensor 2 Circuit?

Start by cleaning the throttle body, inspecting and repairing any damaged wiring or connectors, and if needed, replacing the throttle position sensor or addressing any issues with the engine control module.

6. Is it safe to continue driving my Isuzu with OBDII code P1220 indicating a problem with the Throttle Position Sensor 2 Circuit?

It is not recommended to continue driving your Isuzu with this issue as it can lead to further damage to the engine and affect the vehicle's performance.

7. How much does it typically cost to repair OBDII code P1220 in an Isuzu related to the Throttle Position Sensor 2 Circuit?

The cost of repair can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

8. Can resetting the OBDII code P1220 in an Isuzu make the issue go away permanently?

Resetting the code may temporarily turn off the check engine light, but if the underlying problem with the Throttle Position Sensor 2 Circuit is not addressed, the code is likely to reappear.

9. Will OBDII code P1220 in an Isuzu cause the vehicle to fail an emissions test?

Yes, having OBDII code P1220 can cause your Isuzu to fail an emissions test as it indicates a malfunction in the Throttle Position Sensor 2 Circuit, which is essential for proper engine performance.

10. How long does it usually take to repair OBDII code P1220 in an Isuzu related to the Throttle Position Sensor 2 Circuit?

The repair time can vary depending on the exact cause of the issue, but it typically takes a few hours for a professional mechanic to diagnose and fix the problem.