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P2147 Chevrolet Code - Cylinder 1 Injector High Control Circuit Low Voltage

Quick Answer

The P2147 Chevrolet code indicates that there is a problem with the Cylinder 1 Injector High Control Circuit, specifically that the voltage is too low. Common causes include Corrosion or damage to the wiring harness, Faulty injector, Malfunctioning ECM/PCM. 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
P2147 Chevrolet indicates Cylinder 1 Injector High Control Circuit Low Voltage.
Common causes
Common causes include Corrosion or damage to the wiring harness, Faulty injector, Malfunctioning ECM/PCM.
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 09, 2024
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Code P2147 Chevrolet Description

The P2147 Chevrolet code indicates that there is a problem with the Cylinder 1 Injector High Control Circuit, specifically that the voltage is too low. In a fuel-injected engine, each cylinder has its own fuel injector, which is responsible for delivering the precise amount of fuel needed for combustion. The injector is controlled by the engine control module (ECM) or powertrain control module (PCM) through the injector high control circuit.

OBDII Code P2147 Chevrolet - Cylinder 1 Injector High Control Circuit Low Voltage
P2147 Chevrolet Code - Cylinder 1 Injector High Control Circuit Low Voltage

Common Causes of P2147 Chevrolet

  1. Corrosion or damage to the wiring harness
  2. Faulty injector
  3. Malfunctioning ECM/PCM
  4. Poor electrical connection
  5. Issues with the fuel system

Symptoms of P2147 Chevrolet

  1. Engine misfires
  2. Rough idling
  3. Decreased fuel efficiency
  4. Engine stalling
  5. Check Engine Light illuminated

How to Fix P2147 Chevrolet

  1. Begin by conducting a visual inspection of the wiring harness and connectors to check for any signs of damage, corrosion, or loose connections.
  2. Test the injector using a multimeter to determine if it is functioning properly.
  3. Check the voltage on the Cylinder 1 Injector High Control Circuit to identify any abnormalities.
  4. If necessary, replace the injector, repair any damaged wiring, or replace the ECM/PCM.
  5. Clear the diagnostic trouble codes, reset the ECM/PCM, and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P2147 Chevrolet

The repair costs for addressing a P2147 Chevrolet code can vary depending on the specific cause of the issue. In general, the cost of replacing a fuel injector can range from $150 to $300, while repairing wiring issues or replacing an ECM/PCM could cost anywhere from $200 to $500 or more. Labor costs typically range from $80 to $150 per hour, and the total repair bill could amount to several hundred dollars. It's recommended to consult with a trusted mechanic or auto repair shop to obtain a more accurate estimate based on the specific circumstances of the vehicle.

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Information for Specific Chevrolet Models

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 P2147 Chevrolet Code

1. What are the common symptoms of OBDII code P2147 in a Chevrolet related to Cylinder 1 Injector High Control Circuit Low Voltage?

The common symptoms include engine misfires, rough idling, poor acceleration, and potentially a noticeable decrease in fuel efficiency.

2. What are the possible causes of OBDII code P2147 in a Chevrolet indicating Cylinder 1 Injector High Control Circuit Low Voltage?

The code may be triggered by issues such as a faulty fuel injector, a wiring harness problem, a defective engine control module (ECM), or poor electrical connections.

3. How can I diagnose the cause of OBDII code P2147 in a Chevrolet pointing to Cylinder 1 Injector High Control Circuit Low Voltage?

Diagnosing the issue typically involves checking the electrical connections, testing the fuel injector, inspecting the wiring harness for any damage, and scanning the ECM for any related fault codes.

4. What are some repair tips for fixing OBDII code P2147 in a Chevrolet related to Cylinder 1 Injector High Control Circuit Low Voltage?

Repair tips may include replacing the faulty fuel injector, repairing or replacing damaged wiring, ensuring all electrical connections are secure, and resetting the ECM after completing the repairs.

5. Is it safe to continue driving with OBDII code P2147 in a Chevrolet indicating Cylinder 1 Injector High Control Circuit Low Voltage?

It is generally not recommended to continue driving with this code present, as it can lead to further engine performance issues and potential damage. It's best to address the problem promptly.

6. Can a DIY enthusiast fix OBDII code P2147 in a Chevrolet related to Cylinder 1 Injector High Control Circuit Low Voltage?

While some DIY enthusiasts may be able to diagnose and repair this issue, it's important to have the necessary knowledge, tools, and experience to work on the fuel system and electrical components safely.

7. How much does it typically cost to repair OBDII code P2147 in a Chevrolet indicating Cylinder 1 Injector High Control Circuit Low Voltage?

The cost of repairs can vary depending on the underlying cause, but it may involve expenses such as the price of a new fuel injector, wiring repairs, labor costs, and potentially diagnostic fees.

8. Will resetting the OBDII code P2147 in a Chevrolet related to Cylinder 1 Injector High Control Circuit Low Voltage make it go away permanently?

Resetting the code may temporarily clear it, but if the underlying issue is not addressed, the code is likely to reappear once the ECM detects the problem again.

9. Are there any preventive measures to avoid OBDII code P2147 in a Chevrolet indicating Cylinder 1 Injector High Control Circuit Low Voltage in the future?

Regularly maintaining your vehicle, checking for any signs of fuel system or wiring problems, and promptly addressing any engine performance issues can help prevent this code from occurring.

10. How urgent is it to address OBDII code P2147 in a Chevrolet related to Cylinder 1 Injector High Control Circuit Low Voltage?

It is advisable to address this code as soon as possible to prevent potential engine damage and ensure optimal performance. Delaying repairs can lead to more severe issues down the line.

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