AutoCodes – Cadillac – P2315 Cadillac

P2315 Cadillac Code - Ignition Coil 6 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 6, Ignition Coil 6 harness is open or shorted, Ignition Coil 6 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: P2315 Cadillac indicates Ignition Coil 6 Control Circuit Low Voltage.
Common causes: Common causes include Faulty Ignition Coil 6, Ignition Coil 6 harness is open or shorted, Ignition Coil 6 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 723

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
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Code P2315 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 P2315 Cadillac - Ignition Coil 6 Control Circuit Low Voltage - AutoCodes.com — P2315 Cadillac Code - Ignition Coil 6 Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2315 Cadillac?

Faulty Ignition Coil 6
Ignition Coil 6 harness is open or shorted
Ignition Coil 6 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2315 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 P2315 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 P2315 Cadillac Code

What does the OBDII code P2315 mean for my Cadillac?

P2315 indicates a low voltage condition in the ignition coil control circuit for cylinder 6, which can lead to misfires and ignition issues.

What are the common symptoms of the P2315 code?

Common symptoms include a check engine light, rough idling, engine misfires, decreased acceleration, and poor fuel economy.

What could cause the P2315 code to trigger?

Causes may include a faulty ignition coil, damaged wiring or connectors, a failing powertrain control module (PCM), or issues with the ignition control circuit.

Can I drive my Cadillac with the P2315 code?

It is not recommended to drive your vehicle with this code, as it can lead to engine misfires, which may cause further damage to the engine or catalytic converter.

How can I diagnose the P2315 code?

Start by checking the ignition coil for cylinder 6 and its wiring for damage or corrosion. Use a multimeter to test for voltage and continuity in the circuit.

What are some common repairs for the P2315 code?

Common repairs include replacing the faulty ignition coil, repairing or replacing damaged wiring or connectors, or addressing issues with the PCM.

Will clearing the P2315 code fix the problem?

Clearing the code may temporarily turn off the check engine light, but it will not fix the underlying issue; the code will likely reappear if the problem persists.

How can I prevent the P2315 code from occurring?

Regular maintenance, including checking ignition components and wiring, can help prevent issues. Additionally, addressing engine problems promptly can reduce the risk of triggering this code.

Is the P2315 code serious?

Yes, this code is considered serious as it can lead to performance issues and potential engine damage if left unaddressed.