P135A 2015 GMC Sierra Code - Ignition Coil Supply Voltage Circuit Bank 1
Quick Answer
The diagnostic trouble code P135A in a 2015 GMC Sierra indicates an issue with the ignition coil supply voltage circuit on bank 1. Common causes include Faulty ignition coil, Damaged wiring or connectors in the ignition coil circuit, Malfunctioning ignition control module. 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
- P135A 2015 GMC Sierra indicates Ignition Coil Supply Voltage Circuit Bank 1.
- Common causes
- Common causes include Faulty ignition coil, Damaged wiring or connectors in the ignition coil circuit, Malfunctioning ignition control module.
- 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 P135A 2015 GMC Sierra Description
The diagnostic trouble code P135A in a 2015 GMC Sierra indicates an issue with the ignition coil supply voltage circuit on bank 1. The ignition coil is a crucial component in the ignition system of a vehicle, responsible for converting the low voltage from the battery into the high voltage needed to ignite the fuel-air mixture in the engine cylinders. In this case, the code specifically points to a problem with the supply voltage to the ignition coil on bank 1, which could lead to misfires, rough idling, and overall poor engine performance.
Common Causes of P135A 2015 GMC Sierra
- Faulty ignition coil
- Damaged wiring or connectors in the ignition coil circuit
- Malfunctioning ignition control module
- Issues with the power supply to the ignition system
Symptoms of P135A 2015 GMC Sierra
- Engine misfires
- Rough idling or vibrations
- Decreased fuel efficiency
- Loss of power
- Engine stalling
How to Fix P135A 2015 GMC Sierra
- Diagnose the specific cause of the issue using a scan tool to pinpoint the faulty component.
- Inspect the ignition coil, wiring, and connectors for any signs of damage or wear.
- Replace the faulty ignition coil, wiring, connectors, or ignition control module as needed.
- Clear the diagnostic trouble codes from the vehicle's computer and perform a test drive to ensure the issue has been resolved.
Cost to Fix P135A 2015 GMC Sierra
The typical repair costs for addressing the ignition coil supply voltage circuit issue on a 2015 GMC Sierra can range from $150 to $400, including parts and labor. However, it's important to note that the actual cost may vary depending on the specific components that need to be replaced and the labor rates at the auto repair shop. Diagnostic time and labor rates can vary between $80 and $150 per hour, so it's advisable to check with local shops for a more accurate estimate.
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Frequently Asked Questions about P135A 2015 GMC Sierra Code
What does the OBDII code P135A mean on a 2015 GMC Sierra?
The P135A code indicates an issue with the ignition coil supply voltage circuit on Bank 1, which affects the proper functioning of the ignition system.
What are the common symptoms of the P135A code?
Symptoms may include engine misfires, rough idling, reduced power, poor fuel economy, and the check engine light turning on.
What causes the P135A code to appear?
Common causes include a faulty ignition coil, damaged wiring or connectors in the ignition circuit, a bad engine control module (ECM), or issues with the power supply to the ignition coil.
How do I diagnose the P135A code?
Start by checking the ignition coil and its wiring for damage, test the voltage at the ignition coil connector, and use a scan tool to monitor live data for abnormalities in the ignition system.
Can I drive my 2015 GMC Sierra with the P135A code?
Driving with this code is not recommended, as it can cause further damage to the engine and catalytic converter due to misfires or poor ignition performance.
How can I fix the P135A code?
Repair steps may include replacing the faulty ignition coil, repairing damaged wiring or connectors, and ensuring the proper voltage supply to the ignition circuit.
How much does it cost to repair the P135A code?
Repair costs vary depending on the issue, but replacing an ignition coil typically costs $100-$300, while wiring repairs can cost $50-$200.
Can a dead battery cause the P135A code?
A weak or dead battery may cause voltage supply issues, which could potentially trigger the P135A code, but it is not a common cause.
Does the P135A code only affect Bank 1?
Yes, the P135A code specifies an issue with the ignition coil supply voltage circuit on Bank 1, which is the side of the engine containing cylinder 1.
What tools are needed to troubleshoot the P135A code?
You’ll need a digital multimeter to test voltage, a scan tool to read and clear codes, and possibly basic hand tools to inspect and replace components.
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