AutoCodes – Cadillac – P1248 Cadillac

P1248 Cadillac Code - Injector 1 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 1, Fuel Injector 1 harness is open or shorted, Fuel Injector 1 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: P1248 Cadillac indicates Injector 1 Positive Voltage Control Circuit Shorted to Control Circuit.
Common causes: Common causes include Faulty Fuel Injector 1, Fuel Injector 1 harness is open or shorted, Fuel Injector 1 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 1,076

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 P1248 Cadillac 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 P1248 Cadillac - Injector 1 Positive Voltage Control Circuit Shorted to Control Circuit - AutoCodes.com — P1248 Cadillac Code - Injector 1 Positive Voltage Control Circuit Shorted to Control Circuit

What does this mean?

What are the Possible Causes of the DTC P1248 Cadillac?

Faulty Fuel Injector 1
Fuel Injector 1 harness is open or shorted
Fuel Injector 1 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P1248 Cadillac?

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 P1248 Cadillac 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.

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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 P1248 Cadillac Code

1. What are the common symptoms of OBDII code P1248 in a Cadillac?

The common symptoms of OBDII code P1248 in a Cadillac may include rough idling, engine misfires, poor fuel efficiency, and the illumination of the Check Engine light.

2. What can cause the OBDII code P1248 to trigger in a Cadillac?

The OBDII code P1248 in a Cadillac is typically triggered when the Injector 1 Positive Voltage Control Circuit is shorted to the Control Circuit. This can be caused by wiring issues, a faulty injector, or a problem with the Engine Control Module (ECM).

3. How serious is OBDII code P1248 in a Cadillac?

OBDII code P1248 in a Cadillac should be addressed promptly to prevent potential engine performance issues and further damage. Ignoring this code could lead to drivability problems and increased fuel consumption.

4. How can I diagnose the OBDII code P1248 in my Cadillac?

Diagnosing OBDII code P1248 involves using a diagnostic scanner to retrieve the code, checking the wiring harness and connectors for any damage, and testing the injector for proper operation. It is recommended to consult a professional mechanic for an accurate diagnosis.

5. Can I drive my Cadillac with OBDII code P1248?

It is not recommended to drive your Cadillac with OBDII code P1248 present, as it can lead to potential engine issues and worsen fuel efficiency. It is best to address the underlying problem before continuing to drive the vehicle.

6. How can I repair OBDII code P1248 in a Cadillac?

To repair OBDII code P1248 in a Cadillac, you may need to replace the faulty injector, repair any damaged wiring, or replace the Engine Control Module (ECM) if necessary. It is advisable to seek professional assistance for proper repair.

7. Will resetting the Check Engine light fix OBDII code P1248 in my Cadillac?

Resetting the Check Engine light may temporarily turn off the light, but it will not fix the underlying issue causing OBDII code P1248. It is crucial to diagnose and repair the problem to prevent further complications.

8. Can a DIY enthusiast fix OBDII code P1248 in a Cadillac?

While some DIY enthusiasts may have the skills to diagnose and repair OBDII code P1248, it is recommended to seek professional help for this particular issue due to its complexity and potential impact on engine performance.

9. How much does it cost to fix OBDII code P1248 in a Cadillac?

The cost to fix OBDII code P1248 in a Cadillac can vary depending on the exact cause of the issue, the parts needed for repair, and labor costs. It is best to obtain quotes from reputable mechanics or repair shops for an accurate estimate.

10. Can bad fuel quality trigger OBDII code P1248 in a Cadillac?

While bad fuel quality can potentially cause engine performance issues, OBDII code P1248 is more commonly associated with wiring problems, injector issues, or ECM malfunctions rather than bad fuel quality.