P135B 2015 GMC Sierra Code - Ignition Coil Supply Voltage Circuit Bank 2
Quick Answer
The P135B diagnostic trouble code (DTC) for a 2015 GMC Sierra specifically refers to the Ignition Coil Supply Voltage Circuit Bank 2. Common causes include Faulty ignition coil, Damaged wiring or connectors in the ignition coil circuit, Malfunctioning ignition coil 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
- P135B 2015 GMC Sierra indicates Ignition Coil Supply Voltage Circuit Bank 2.
- Common causes
- Common causes include Faulty ignition coil, Damaged wiring or connectors in the ignition coil circuit, Malfunctioning ignition coil 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 P135B 2015 GMC Sierra Description
The P135B diagnostic trouble code (DTC) for a 2015 GMC Sierra specifically refers to the Ignition Coil Supply Voltage Circuit Bank 2. This code indicates that there is an issue with the supply voltage to the ignition coil in the second bank of the engine. 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. When the supply voltage to the ignition coil is compromised, it can lead to misfires, rough idling, and overall poor engine performance.
Common Causes of P135B 2015 GMC Sierra
- Faulty ignition coil.
- Damaged wiring or connectors in the ignition coil circuit.
- Malfunctioning ignition coil control module.
- Issues with the vehicle's power supply.
- Corrosion or poor connections in the electrical system.
Symptoms of P135B 2015 GMC Sierra
- Engine misfires or hesitation during acceleration.
- Rough idling or stalling.
- Decreased fuel efficiency.
- Illumination of the check engine light.
- Difficulty starting the engine.
How to Fix P135B 2015 GMC Sierra
- Begin by diagnosing the specific cause of the issue using a scan tool to pinpoint the exact source of the problem.
- Inspect the ignition coil, wiring, and connectors for any visible damage or corrosion. Replace any components that are faulty.
- Test the ignition coil control module to ensure it is functioning correctly. Replace if necessary.
- Check the vehicle's power supply to ensure it is delivering the correct voltage to the ignition coil.
- Clear the DTC and test drive the vehicle to confirm that the issue has been resolved.
Cost to Fix P135B 2015 GMC Sierra
The typical repair costs for addressing the P135B code on a 2015 GMC Sierra can vary depending on the specific cause of the issue and the cost of parts and labor. On average, the repair for this code could range from $200 to $500, including parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate. Keep in mind that rates may be higher at dealerships or in metropolitan areas, while independent shops may offer more competitive pricing.
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Frequently Asked Questions about P135B 2015 GMC Sierra Code
What does the OBDII code P135B mean in a 2015 GMC Sierra?
P135B indicates a problem with the ignition coil supply voltage circuit on Bank 2, which can affect engine performance and ignition timing.
What are common symptoms of code P135B in a 2015 GMC Sierra?
Symptoms may include a rough idle, engine misfires, reduced power, poor fuel economy, and the Check Engine Light illuminating.
What causes the P135B code to trigger in a 2015 GMC Sierra?
Common causes include a faulty ignition coil, damaged wiring or connectors in the ignition coil circuit, a blown fuse, or issues with the powertrain control module (PCM).
How do I diagnose the P135B code on my 2015 GMC Sierra?
Start by checking for damaged wiring, loose connections, or blown fuses in the ignition coil circuit for Bank 2. Use a multimeter to test voltage and resistance, and inspect the ignition coil itself.
Can I drive my 2015 GMC Sierra with the P135B code?
Driving with this code is not recommended, as it can lead to engine misfires, reduced performance, and potential long-term engine damage if not addressed promptly.
How do I fix the P135B code on a 2015 GMC Sierra?
Repairs may involve replacing a faulty ignition coil, repairing damaged wiring, securing loose connections, replacing a blown fuse, or reprogramming the PCM if necessary.
What tools do I need to repair the P135B code on a 2015 GMC Sierra?
You'll need an OBDII scanner, multimeter, and basic hand tools such as pliers and screwdrivers to inspect and repair wiring and components.
How much does it cost to fix the P135B code on a 2015 GMC Sierra?
Repair costs vary depending on the issue but can range from $50-$150 for a new ignition coil or several hundred dollars if PCM reprogramming or extensive wiring repairs are needed.
Can a bad PCM cause the P135B code in a 2015 GMC Sierra?
Yes, a faulty PCM can cause this code if it fails to properly control the ignition coil supply voltage circuit for Bank 2.
How can I prevent the P135B code from occurring in my 2015 GMC Sierra?
Regular maintenance, including inspecting ignition components and wiring for wear or damage, can help prevent this code from appearing.
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