AutoCodes – Generic – P1249

P1249 Code - Injector 2 Positive Voltage Control Circuit Shorted to Control Circuit

Quick Answer

The Engine Control Module (ECM) supplies voltage to each fuel injector on the injector high voltage supply 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: P1249 indicates Injector 2 Positive Voltage Control Circuit Shorted to 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 16,726

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 P1249 Description

The Engine Control Module (ECM) supplies voltage to each fuel injector on the injector high voltage supply circuits. The ECM energizes each fuel injector by grounding the high voltage control circuit of the fuel injector. The ECM monitors the status of the injector high voltage supply circuits and the fuel injector high voltage control 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 if the ECM detects the injector high control circuit is shorted to the low control circuit for greater than 2 s.

OBDII Code P1249 - Injector 2 Positive Voltage Control Circuit Shorted to Control Circuit - AutoCodes.com — P1249 Code - Injector 2 Positive Voltage Control Circuit Shorted to Control Circuit

What does this mean?

What are the Possible Causes of the DTC P1249?

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 P1249?

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 P1249 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 P1249 code?

Need more information on how to fix the P1249 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1249 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1249 Audi — Fuel Consumption Signal Electrical Fault In Circuit
P1249 Buick — Injector 2 Positive Voltage Control Circuit Shorted to Control Circuit
P1249 Cadillac — Injector 2 Positive Voltage Control Circuit Shorted to Control Circuit
P1249 Chevrolet — Injector 2 Positive Voltage Control Circuit Shorted to Control Circuit
P1249 Ford — Wastegate Fail Steady State Test
P1249 GMC — Injector 2 Positive Voltage Control Circuit Shorted to Control Circuit
P1249 Isuzu — Low Fuel Pressure Sensor Circuit High Voltage
P1249 Volkswagen — Fuel Consumption Signal Electrical Fault In Circuit

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 P1249 Code

1. What are common symptoms of OBDII code P1249?

- Common symptoms include engine misfires, rough idling, poor acceleration, and possibly black smoke coming from the exhaust.

2. What does OBDII code P1249 mean?

- OBDII code P1249 indicates that there is a short circuit between the positive voltage control circuit and the control circuit of injector 2 in the vehicle's engine.

3. What are possible causes of OBDII code P1249?

- Possible causes include a damaged injector, a short circuit in the wiring harness, a faulty PCM (powertrain control module), or a poor electrical connection.

4. How serious is OBDII code P1249?

- OBDII code P1249 should be addressed promptly as it can lead to engine performance issues and potentially cause further damage if left unresolved.

5. How can I diagnose OBDII code P1249?

- Diagnosing OBDII code P1249 involves using a diagnostic scanner to read the code, inspecting the wiring harness for any visible damage, and testing the injector and related components for proper functionality.

6. Can I still drive my vehicle with OBDII code P1249?

- It is not recommended to drive the vehicle with OBDII code P1249 present, as it can lead to poor engine performance and potentially cause further damage over time.

7. How can I repair OBDII code P1249?

- Repairing OBDII code P1249 may involve replacing the faulty injector, repairing any damaged wiring, ensuring proper electrical connections, or replacing the PCM if necessary.

8. Is it possible to prevent OBDII code P1249 from occurring?

- While some causes of OBDII code P1249 may be unavoidable, regular maintenance and inspections of the vehicle's fuel system and electrical components can help prevent this issue.

9. Can OBDII code P1249 be triggered intermittently?

- Yes, OBDII code P1249 can be triggered intermittently if the short circuit between the positive voltage control circuit and the control circuit of injector 2 is intermittent.

10. How much does it typically cost to repair OBDII code P1249?

- The cost of repairing OBDII code P1249 can vary depending on the specific cause of the issue, but it may range from $200 to $500 or more, including parts and labor.