P2304 GMC Code - Ignition Coil 2 Control Circuit High Voltage
Quick Answer
The ignition system on this engine uses ignition coils with integrated power transistors. Common causes include Faulty Ignition Coil 2, Ignition Coil 2 harness is open or shorted, Ignition Coil 2 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
- P2304 GMC indicates Ignition Coil 2 Control Circuit High Voltage.
- Common causes
- Common causes include Faulty Ignition Coil 2, Ignition Coil 2 harness is open or shorted, Ignition Coil 2 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.
Code P2304 GMC Description
What are the Possible Causes of the DTC P2304 GMC?
- Faulty Ignition Coil 2
- Ignition Coil 2 harness is open or shorted
- Ignition Coil 2 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P2304 GMC?
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 P2304 GMC 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 P2304 GMC code?
Need more information on how to fix the P2304 GMC code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P2304 GMC code diagnosed by a professional: Find a repair shop in your area
Information for Specific GMC Models
- P2304 2014 GMC Sierra — Ignition Coil 2 Control Circuit High Voltage
- P2304 2015 GMC Sierra — Ignition Coil 2 Control Circuit High Voltage
- P2304 2016 GMC Sierra — Ignition Coil 2 Control Circuit High Voltage
- P2304 2017 GMC Sierra — Ignition Coil 2 Control Circuit High Voltage
- P2304 2018 GMC Sierra — Ignition Coil 2 Control Circuit High Voltage
Frequently Asked Questions about P2304 GMC Code
1. What are common symptoms of OBDII code P2304 for Ignition Coil 2 Control Circuit High Voltage?
- Common symptoms include rough idling, engine misfires, loss of power, and illuminated check engine light.
2. What can cause the ignition coil 2 control circuit high voltage issue (P2304) in a GMC vehicle?
- Possible causes include a faulty ignition coil, damaged wiring or connectors, a defective PCM, or a problem with the ignition control module.
3. How can I diagnose the cause of OBDII code P2304 related to Ignition Coil 2 Control Circuit High Voltage?
- To diagnose the issue, you can perform a visual inspection of wiring and connectors, test the ignition coil and related components, and use a scan tool to monitor live data and check for any additional trouble codes.
4. Is it safe to drive with the P2304 OBDII code indicating Ignition Coil 2 Control Circuit High Voltage?
- It is not recommended to drive with this code present, as it can lead to further damage to the ignition system and potentially cause more severe issues with the engine's performance.
5. How can I repair the Ignition Coil 2 Control Circuit High Voltage problem indicated by code P2304 in a GMC vehicle?
- Repair options may include replacing the faulty ignition coil, repairing or replacing damaged wiring or connectors, resetting the PCM, or addressing any other underlying issues causing the high voltage condition.
6. Can a DIY enthusiast fix the P2304 code for Ignition Coil 2 Control Circuit High Voltage?
- While some DIYers may be able to address this issue by replacing the ignition coil or checking for loose connections, it is recommended to consult a professional mechanic for a proper diagnosis and repair.
7. Does the Ignition Coil 2 Control Circuit High Voltage issue affect the overall performance of the vehicle?
- Yes, this issue can impact the engine's performance, leading to rough running, decreased fuel efficiency, and potential damage to other engine components if left unresolved.
8. How long does it typically take to repair the P2304 code related to Ignition Coil 2 Control Circuit High Voltage?
- The repair time can vary depending on the exact cause of the issue and the extent of the repairs needed, but it may take anywhere from a couple of hours to a full day to address the problem.
9. Are there any preventive maintenance tips to avoid encountering the P2304 OBDII code in the future?
- To help prevent issues like P2304, it's essential to follow your vehicle's recommended maintenance schedule, including regular inspections of the ignition system and addressing any issues promptly.
10. Can a bad spark plug cause the P2304 code for Ignition Coil 2 Control Circuit High Voltage in a GMC vehicle?
- While a bad spark plug can contribute to ignition system problems, it is not a common direct cause of the P2304 code. Focus on checking the ignition coil, wiring, and related components first.
Discuss the causes and fixes for P2304 GMC OBDII Code
Code P2304 GMC comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
