AutoCodes – Pontiac – P1315 Pontiac

P1315 Pontiac Code - Ignition Coil 4 Primary Feedback Circuit

Quick Answer

The Diagnostic Trouble Code (DTC) Ignition Coil Primary Feedback Circuit monitors the primary circuitry of individual ignition coils for successful completion of an ignition event. Common causes include Faulty Ignition Coil 4, Ignition Coil 4 harness is open or shorted, Ignition Coil 4 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: P1315 Pontiac indicates Ignition Coil 4 Primary Feedback Circuit.
Common causes: Common causes include Faulty Ignition Coil 4, Ignition Coil 4 harness is open or shorted, Ignition Coil 4 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 407

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Mar 28, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1315 Pontiac Description

The Diagnostic Trouble Code (DTC) Ignition Coil Primary Feedback Circuit monitors the primary circuitry of individual ignition coils for successful completion of an ignition event. The ignition trigger signal and ignition fail-safe input signal provide crucial information in the control of ignition system timing and activation of the fail-safe function. Based on the initial timing angle, calculated from the crankshaft and the camshaft position signals, Powertrain Control Module (PCM) calculates the ignition trigger signal. The ignition trigger signal is then sent to the ignition control circuitry located in each ignition coil. Ignition control circuitry initiates the ignition dwell period by commanding the power transistor ON. When PCM determines the proper time to provide a spark, the PCM turns OFF the ignition trigger signal. In response to the PCM signal, the ignition coil control circuitry turns OFF the power transistor, producing a high voltage discharge from secondary coil windings. After a spark has occurred, the control circuitry sends an ignition fail-safe input signal back to the PCM, confirming that an ignition event has taken place. If the ignition fail-safe input signal is not received by the PCM, a cylinder-specific DTC will be set.
Anytime the fail-safe input signal is lost, engine operation will enter the fail-safe function. If engine load exceeds certain parameters during fail-safe function, FUEL CUT-OFF mode is activated, and fuel injector operation is ceased. The suspension of fuel injection in FUEL CUT-OFF mode protects the catalytic converter from damage. Damage can occur when excess unburned fuel reaches the converter and causes the catalyst to overheat.

OBDII Code P1315 Pontiac - Ignition Coil 4 Primary Feedback Circuit - AutoCodes.com — P1315 Pontiac Code - Ignition Coil 4 Primary Feedback Circuit

What does this mean?

What are the Possible Causes of the DTC P1315 Pontiac?

Faulty Ignition Coil 4
Ignition Coil 4 harness is open or shorted
Ignition Coil 4 circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P1315 Pontiac?

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 P1315 Pontiac 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 P1315 Pontiac Code

1. What are the common symptoms of OBDII code P1315 in a Pontiac related to the Ignition Coil 4 Primary Feedback Circuit?

- Common symptoms include engine misfires, rough idling, loss of power, and illuminated Check Engine Light.

2. What are the possible causes of OBDII code P1315 in a Pontiac indicating an issue with the Ignition Coil 4 Primary Feedback Circuit?

- Possible causes include a faulty ignition coil, damaged wiring or connectors, a defective PCM, or an issue with the ignition system.

3. How can I diagnose the source of OBDII code P1315 in my Pontiac specifically related to the Ignition Coil 4 Primary Feedback Circuit?

- It is recommended to perform a thorough visual inspection of the ignition coil and its wiring, test the coil for proper resistance, and use a diagnostic scan tool to check for any additional related codes.

4. What steps can I take to repair OBDII code P1315 in my Pontiac related to the Ignition Coil 4 Primary Feedback Circuit?

- Repair steps may include replacing the faulty ignition coil, repairing damaged wiring or connectors, resetting the fault codes, and clearing the Check Engine Light.

5. Is it safe to continue driving my Pontiac with OBDII code P1315 indicating an issue with the Ignition Coil 4 Primary Feedback Circuit?

- It is not recommended to drive the vehicle with this code present, as it can lead to further engine damage and potential safety hazards.

6. Can a DIY enthusiast with basic automotive knowledge fix OBDII code P1315 in a Pontiac related to the Ignition Coil 4 Primary Feedback Circuit?

- Depending on the root cause, some repairs related to this code can be done by individuals with basic automotive knowledge, but more complex issues may require professional assistance.

7. How much can I expect to pay to repair OBDII code P1315 in a Pontiac concerning the Ignition Coil 4 Primary Feedback Circuit?

- Repair costs can vary depending on the cause of the issue, but generally, expect to pay anywhere from $100 to $300 for parts and labor.

8. Are there any preventative maintenance tips to avoid OBDII code P1315 in my Pontiac related to the Ignition Coil 4 Primary Feedback Circuit in the future?

- Regularly inspecting and maintaining the ignition system components, such as ignition coils and wiring, can help prevent issues leading to this fault code.

9. How long does it typically take to repair OBDII code P1315 in a Pontiac indicating a problem with the Ignition Coil 4 Primary Feedback Circuit?

- Repair times can vary based on the specific cause of the issue and the expertise of the technician, but generally, it can take anywhere from 1 to 3 hours to address this problem.

10. Can OBDII code P1315 in a Pontiac related to the Ignition Coil 4 Primary Feedback Circuit cause permanent damage to the engine if left unresolved?

- Ignoring this fault code can potentially lead to more severe engine problems over time, so it is advisable to address the issue promptly to prevent further damage.