B2792 Code - Cross Link Between Firing Loops

Quick Answer

The B2792 diagnostic trouble code (DTC) indicates a cross link between firing loops in the vehicle's engine control module (ECM). Common causes include Faulty wiring or connections between the ECM and firing loops, Malfunctioning ECM, Corrosion or damage to the wiring harness. 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

B2792 indicates Cross Link Between Firing Loops.

Common causes

Common causes include Faulty wiring or connections between the ECM and firing loops, Malfunctioning ECM, Corrosion or damage to the wiring harness.

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.

• Description
• Common Causes
• Symptoms
• How To Fix
• Cost to Fix
• FAQs
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Common Causes of B2792

Symptoms of B2792

How to Fix B2792

Cost to Fix B2792

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Code B2792 Information for Specific Makes

• B2792 Ford — Cross Link Between Firing Loops
• B2792 Lincoln — Cross Link Between Firing Loops
• B2792 Mercury — Cross Link Between Firing Loops

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

• Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
• Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
• Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
• Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

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 B2792 Code

1. What are the common symptoms of OBDII code B2792 (Cross Link Between Firing Loops)?

- Common symptoms include engine misfires, rough idling, and a noticeable decrease in engine performance.

2. What can cause the OBDII code B2792 to be triggered?

- The code B2792 is usually triggered by issues such as faulty ignition coils, damaged spark plugs, or wiring problems in the ignition system.

3. How can I diagnose the OBDII code B2792?

- Diagnosing the code B2792 involves using a scan tool to read the code and inspecting the ignition system components for any visible damage or issues.

4. What are the possible repair options for resolving OBDII code B2792?

- Repair options may include replacing faulty ignition coils, installing new spark plugs, repairing damaged wiring, or resetting the code after resolving the underlying issue.

5. Can driving with the OBDII code B2792 pose any risks to the vehicle?

- Continuing to drive with the code B2792 may lead to further damage to the ignition system components and potentially cause more severe engine problems over time.

6. Is it safe to reset the OBDII code B2792 without addressing the underlying issue?

- It is not recommended to reset the code without addressing the underlying issue, as the problem will persist and may lead to more severe issues in the future.

7. How important is it to address the OBDII code B2792 promptly?

- Addressing the code B2792 promptly is crucial to prevent further damage to the ignition system and ensure optimal engine performance.

8. Can a DIY enthusiast repair the OBDII code B2792, or is professional help recommended?

- While some DIY enthusiasts may be able to address the code B2792 themselves, it is usually recommended to seek professional help for accurate diagnosis and repairs.

9. Are there any preventive maintenance tips to avoid encountering the OBDII code B2792?

- Regularly servicing the ignition system, replacing spark plugs at recommended intervals, and using high-quality fuel can help prevent issues that trigger the code B2792.

10. How can I prevent the OBDII code B2792 from recurring after it has been repaired?

- To prevent the code B2792 from recurring, it is essential to address any underlying issues thoroughly, perform regular maintenance, and address any related problems promptly.