AutoCodes – Cadillac – P2312 Cadillac

P2312 Cadillac Code - Ignition Coil 5 Control Circuit Low Voltage

Quick Answer

The ignition system on this engine uses ignition coils with integrated power transistors. Common causes include Faulty Ignition Coil 5, Ignition Coil 5 harness is open or shorted, Ignition Coil 5 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: P2312 Cadillac indicates Ignition Coil 5 Control Circuit Low Voltage.
Common causes: Common causes include Faulty Ignition Coil 5, Ignition Coil 5 harness is open or shorted, Ignition Coil 5 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 608

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 Jul 31, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P2312 Cadillac Description

The ignition system on this engine uses ignition coils with integrated power transistors. The Engine Control Module (ECM) controls the spark event for each cylinder through individual ignition coil control circuits. When the ECM commands the ignition control circuit On, electrical current flows through the primary winding of the ignition coil, creating a magnetic field. When a spark event is requested, the ECM commands the ignition control circuit Off, interrupting current flow through the primary winding. The collapsing magnetic field created by the primary winding induces a high voltage in the secondary winding, which is connected to the spark plugs. The Diagnostic Trouble Code (DTC) will be set when the control circuit commanded by the ECM state does not match the actual state.

OBDII Code P2312 Cadillac - Ignition Coil 5 Control Circuit Low Voltage - AutoCodes.com — P2312 Cadillac Code - Ignition Coil 5 Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2312 Cadillac?

Faulty Ignition Coil 5
Ignition Coil 5 harness is open or shorted
Ignition Coil 5 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2312 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 P2312 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.

Need more information about the P2312 Cadillac code?

Need more information on how to fix the P2312 Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2312 Cadillac code diagnosed by a professional: Find a repair shop in your area

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 P2312 Cadillac Code

1. What are the common symptoms of OBDII code P2312 Cadillac (Ignition Coil 5 Control Circuit Low Voltage)?

- Common symptoms include engine misfires, rough idling, poor acceleration, and a noticeable decrease in fuel efficiency.

2. What are some possible causes of the P2312 Cadillac trouble code?

- Possible causes include a faulty ignition coil, damaged wiring or connectors in the ignition coil circuit, a malfunctioning powertrain control module (PCM), or a weak battery.

3. How can I diagnose the underlying issue causing the P2312 code on my Cadillac?

- You can start by checking the wiring and connectors related to ignition coil 5 for any visible damage or corrosion. Testing the ignition coil itself and inspecting the PCM for any signs of malfunction can also help pinpoint the issue.

4. Can I still drive my Cadillac with the P2312 trouble code present?

- It is not recommended to drive your Cadillac with the P2312 code present, as it can lead to further engine damage and potential safety hazards. It is best to address the issue promptly.

5. What is the typical repair process for fixing the Ignition Coil 5 Control Circuit Low Voltage issue on a Cadillac?

- The repair process usually involves replacing the faulty ignition coil, repairing or replacing damaged wiring or connectors, resetting the trouble code, and conducting a thorough test drive to ensure the issue is resolved.

6. Are there any preventive maintenance tips to avoid encountering the P2312 trouble code in the future?

- Regularly inspecting and maintaining your ignition system, including the ignition coils and wiring, can help prevent issues like P2312 from occurring. Keeping up with scheduled tune-ups and using high-quality ignition components can also help.

7. Can a DIY enthusiast fix the Ignition Coil 5 Control Circuit Low Voltage problem on a Cadillac?

- While some experienced DIY enthusiasts may be able to diagnose and address the issue themselves, dealing with electrical components like ignition coils and wiring requires a certain level of expertise. It is recommended to consult a professional mechanic for proper diagnosis and repair.

8. How much does it typically cost to repair the P2312 code on a Cadillac at a dealership or auto repair shop?

- The cost of repairing the P2312 code can vary depending on the extent of the issue, the labor rates of the shop, and the cost of parts involved. On average, you can expect to pay anywhere from $100 to $300 for the repair.

9. Will clearing the P2312 trouble code with an OBDII scanner resolve the issue permanently?

- Clearing the trouble code with an OBDII scanner may temporarily eliminate the warning light, but if the underlying issue causing the code is not addressed, it is likely to reappear. It is crucial to diagnose and fix the root cause of the problem.

10. Is it safe to reset the P2312 trouble code and continue driving without addressing the underlying issue?

- It is not recommended to reset the trouble code and ignore the underlying issue, as it can lead to more severe engine problems and potential safety risks. It is best to address the problem promptly to ensure the continued health of your vehicle.