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Engine-Codes – Generic – P1220

P1220 Code - Series Throttle Control System Malfunction

Quick Answer

The P1220 code indicates a malfunction in the Series Throttle Control System. Common causes include Faulty throttle position sensor, Wiring or electrical issues in the throttle control system, Vacuum leaks in the intake system. 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 indicates Series Throttle Control System Malfunction.
Common causes
Common causes include Faulty throttle position sensor, Wiring or electrical issues in the throttle control system, Vacuum leaks in the intake system.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code P1220 Description

The P1220 code indicates a malfunction in the Series Throttle Control System. This system is responsible for regulating the amount of air entering the engine, which directly impacts the vehicle's performance. When this system malfunctions, it can lead to issues such as poor acceleration, rough idling, stalling, and decreased fuel efficiency. The throttle control system is crucial for the engine to receive the correct amount of air for combustion, so any malfunction can have a significant impact on the vehicle's overall performance.

OBDII Code P1220 - Series Throttle Control System Malfunction
P1220 Code - Series Throttle Control System Malfunction

Common Causes of P1220

  1. Faulty throttle position sensor
  2. Wiring or electrical issues in the throttle control system
  3. Vacuum leaks in the intake system
  4. Dirty or clogged throttle body
  5. Electronic control module (ECM) failure

Symptoms of P1220

  1. Poor acceleration or hesitation when pressing the gas pedal
  2. Rough idling or stalling while the vehicle is stationary
  3. Reduced fuel efficiency
  4. Check Engine Light illuminated on the dashboard
  5. Difficulty maintaining a consistent speed while driving

How to Fix P1220

  1. Diagnose the issue by using a scan tool to read the fault codes and inspecting the throttle control system components.
  2. Clean or replace the throttle body if it is dirty or clogged.
  3. Check and repair any wiring or electrical issues in the throttle control system.
  4. Replace the throttle position sensor if it is found to be faulty.
  5. If necessary, replace the electronic control module (ECM) to address any underlying issues with the system.

Cost to Fix P1220

The cost of repairing a Series Throttle Control System malfunction can vary depending on the specific cause of the issue. On average, you can expect to pay anywhere from $200 to $500 for parts and labor. However, it's essential to keep in mind that labor rates can vary significantly based on the location and the type of auto repair shop you visit. It's best to consult with a trusted mechanic to get an accurate estimate for your particular situation.

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Code P1220 Information for Specific Makes

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 Code

1. What are the common symptoms of OBDII code P1220 (Series Throttle Control System Malfunction)?

- Common symptoms include engine stalling, loss of power, rough idle, and difficulty accelerating.

2. What are the possible causes of OBDII code P1220?

- The code P1220 can be triggered by issues with the throttle position sensor, throttle body, wiring harness, or electronic control unit (ECU).

3. How serious is the OBDII code P1220?

- The code P1220 should be addressed promptly, as it can lead to drivability issues and potential safety concerns if not resolved.

4. What should I do if my vehicle shows OBDII code P1220?

- It is recommended to have a professional mechanic diagnose and repair the issue to prevent further damage to the throttle control system.

5. Can I still drive my vehicle with OBDII code P1220?

- It is not advisable to drive the vehicle with code P1220, as it can result in poor performance and potential safety hazards.

6. Are there any DIY repair tips for fixing OBDII code P1220?

- DIY repair for code P1220 is not recommended due to the complexity of the throttle control system. It's best to seek professional help.

7. How much does it typically cost to repair OBDII code P1220?

- The cost of repairing code P1220 can vary depending on the root cause of the issue, but it may range from a few hundred to over a thousand dollars.

8. Can a faulty throttle control system cause other OBDII codes to appear?

- Yes, a malfunctioning throttle control system can trigger related codes such as P0120, P0121, P0122, and P0123.

9. Will resetting the OBDII code P1220 make it go away permanently?

- Simply resetting the code may temporarily clear the warning light, but if the underlying issue is not fixed, the code is likely to reappear.

10. How can I prevent OBDII code P1220 from occurring in the future?

- Regular maintenance, including cleaning the throttle body and ensuring proper wiring connections, can help prevent the recurrence of code P1220.

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