AutoCodes – Generic – P2149

P2149 Code - Cylinder 2 Injector High Control Circuit

Quick Answer

The Engine Control Module (ECM) supplies voltage to each fuel injector on the high control circuits. Common causes include Faulty Fuel Injector 2, Fuel Injector 2 harness is open or shorted, Fuel Injector 2 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: P2149 indicates Cylinder 2 Injector High Control Circuit.
Common causes: Common causes include Faulty Fuel Injector 2, Fuel Injector 2 harness is open or shorted, Fuel Injector 2 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 32,683

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 23, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2149 Description

The Engine Control Module (ECM) supplies voltage to each fuel injector on the high control circuits. The ECM energizes each fuel injector by grounding the low control circuit of the fuel injector. The ECM monitors the status of the fuel injector circuits. When a fuel injector circuit condition is detected by the ECM, the affected fuel injector(s) is disabled. The Diagnostic Trouble Code (DTC) will be set when the ECM detects the fuel injector high voltage supply circuit is not to factory specifications.

OBDII Code P2149 - Cylinder 2 Injector High Control Circuit - AutoCodes.com — P2149 Code - Cylinder 2 Injector High Control Circuit

What does this mean?

What are the Possible Causes of the DTC P2149?

Faulty Fuel Injector 2
Fuel Injector 2 harness is open or shorted
Fuel Injector 2 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2149?

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 P2149 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 P2149 code?

Need more information on how to fix the P2149 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2149 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P2149 Buick — Cylinder 2 Injector High Control Circuit
P2149 Cadillac — Cylinder 2 Injector High Control Circuit
P2149 Chevrolet — Cylinder 2 Injector High Control Circuit
P2149 Dodge — Cylinder 2 Injector High Control Circuit
P2149 GMC — Cylinder 2 Injector High Control Circuit
P2149 Hyundai — Fuel Injector Group 'B' Supply Voltage Circuit Open
P2149 KIA — Fuel Injector Group 'B' Supply Voltage Circuit Open
P2149 Nissan — No. 2 And 3 Cylinder Fuel Injector Power Supply Circuit Open

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 P2149 Code

1. What does the OBDII code P2149 mean?

P2149 indicates a problem with the Cylinder 2 Injector High Control Circuit, meaning the injector's control circuit is malfunctioning or has an electrical issue.

2. What are common symptoms of a P2149 code?

Symptoms include engine misfires, rough idling, reduced power, poor fuel economy, and the check engine light turning on.

3. What causes a P2149 code to be triggered?

Common causes include a faulty fuel injector, damaged wiring or connectors in the injector circuit, a defective injector driver in the PCM, or a blown fuse.

4. How do I diagnose the P2149 code?

Start by inspecting the wiring and connectors for damage or corrosion, check the fuel injector's resistance with a multimeter, and test the PCM's injector driver circuit if no physical issues are found.

5. Can I drive my car with a P2149 code?

Driving with a P2149 code is not recommended, as it can lead to further engine damage, poor performance, and unsafe driving conditions.

6. How do I fix a P2149 code?

Repairs may include replacing the faulty injector, repairing or replacing damaged wiring or connectors, replacing a blown fuse, or reprogramming or replacing the PCM if necessary.

7. How much does it cost to fix the P2149 code?

Repair costs vary, ranging from $100 to $500 or more, depending on whether the issue involves replacing a fuel injector, repairing wiring, or addressing PCM problems.

8. Can a dirty fuel injector cause the P2149 code?

No, a dirty injector typically causes performance issues but not an electrical circuit fault. P2149 specifically relates to an electrical malfunction in the injector control circuit.

9. Will resetting the check engine light fix the P2149 code?

Resetting the light without addressing the underlying issue will not solve the problem, and the code is likely to return.

10. What tools are needed to troubleshoot a P2149 code?

You’ll need an OBDII scanner, a multimeter to test electrical circuits, and potentially a wiring diagram for the injector control system to diagnose the issue properly.