P135B 2017 GMC Sierra Code - Ignition Coil Supply Voltage Circuit Bank 2
Quick Answer
The ignition system uses an individual ignition coil for each cylinder. Common causes include Blown Ignition Coil Fuse, Ignition Coil Fuse harness is open or shorted, Ignition Coil Fuse 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
- P135B 2017 GMC Sierra indicates Ignition Coil Supply Voltage Circuit Bank 2.
- Common causes
- Common causes include Blown Ignition Coil Fuse, Ignition Coil Fuse harness is open or shorted, Ignition Coil Fuse 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 P135B 2017 GMC Sierra Description
What are the Possible Causes of the DTC P135B 2017 GMC Sierra?
- Blown Ignition Coil Fuse
- Ignition Coil Fuse harness is open or shorted
- Ignition Coil Fuse circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P135B 2017 GMC Sierra?
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 P135B 2017 GMC Sierra 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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Frequently Asked Questions about P135B 2017 GMC Sierra Code
1. What does the OBDII code P135B mean on a 2017 GMC Sierra?
P135B refers to an issue with the ignition coil supply voltage circuit on Bank 2, indicating a problem with the electrical supply to one or more ignition coils on that side of the engine.
2. What are the common symptoms of code P135B in a 2017 GMC Sierra?
Common symptoms include engine misfires, rough idling, poor acceleration, reduced fuel efficiency, and possibly an illuminated check engine light.
3. What causes the P135B code to appear on a 2017 GMC Sierra?
The most common causes include a faulty ignition coil, damaged wiring or connectors in the ignition coil circuit, a failing powertrain control module (PCM), or a blown fuse related to the ignition system.
4. How can I diagnose code P135B on my 2017 GMC Sierra?
Start by visually inspecting the ignition coil wiring and connectors on Bank 2 for damage or loose connections, test the ignition coils for proper functionality, and check for blown fuses or voltage discrepancies in the circuit.
5. Can I drive my 2017 GMC Sierra with the P135B code active?
Driving with this code is not recommended, as it can cause engine misfires, reduce performance, and potentially lead to further engine damage if left unresolved.
6. How is code P135B typically repaired in a 2017 GMC Sierra?
Repairs usually involve replacing the faulty ignition coil, repairing damaged wiring or connectors, replacing a blown fuse, or, in rare cases, reprogramming or replacing the PCM.
7. How much does it cost to fix the P135B code on a 2017 GMC Sierra?
Repair costs vary depending on the issue, but ignition coil replacement typically ranges from $100 to $300, while wiring repairs or PCM replacement can be more expensive.
8. What tools are needed to fix the P135B code on a 2017 GMC Sierra?
Common tools include a digital multimeter for testing voltage, an OBDII scanner for clearing the code and verifying repairs, and basic hand tools for replacing ignition coils or repairing wiring.
9. Is the P135B code specific to GMC vehicles?
No, while the code is commonly associated with GMC and other General Motors vehicles, it can appear on other makes and models with similar ignition system designs.
10. Can a weak battery cause the P135B code on a 2017 GMC Sierra?
Yes, a weak or failing battery may lead to insufficient voltage supply to ignition components, potentially triggering the P135B code.
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