P135B 2016 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 2016 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 2016 GMC Sierra Description
What are the Possible Causes of the DTC P135B 2016 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 2016 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 2016 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.
Need more information about the P135B 2016 GMC Sierra code?
Need more information on how to fix the P135B 2016 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P135B 2016 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P135B 2016 GMC Sierra Code
1. What does the OBD-II code P135B mean on a 2016 GMC Sierra?
P135B indicates an issue with the Ignition Coil Supply Voltage Circuit on Bank 2, which may affect how the engine fires on that side.
2. What are the common symptoms of code P135B in a 2016 GMC Sierra?
Symptoms include engine misfires, rough idling, reduced performance, poor fuel economy, and possibly the check engine light illuminating.
3. What causes the P135B code to appear on a 2016 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).
4. How do I diagnose the P135B code on my 2016 GMC Sierra?
Start by checking for damaged or disconnected wiring in the ignition coil circuit for Bank 2, inspect the ignition coils, and test for proper voltage and continuity in the circuit.
5. Can I drive my 2016 GMC Sierra with the P135B code?
Driving with this code is not recommended, as it can lead to engine misfires, reduced power, and potential long-term damage to the catalytic converter.
6. How do I fix the P135B code on my 2016 GMC Sierra?
Repairs may include replacing a faulty ignition coil, repairing damaged wiring or connectors, replacing a blown fuse, or reprogramming/updating the PCM if necessary.
7. What tools are needed to troubleshoot the P135B code?
You’ll need an OBD-II scanner, a multimeter for electrical testing, and potentially a wiring diagram for the ignition system.
8. Does the P135B code specifically refer to a single ignition coil?
No, it refers to the supply voltage circuit for all ignition coils on Bank 2, so you’ll need to inspect all coils on that side of the engine.
9. How much does it typically cost to fix the P135B code on a 2016 GMC Sierra?
The cost varies depending on the issue, but ignition coil replacement can range from $100 to $300 per coil, while wiring repairs may cost $50 to $200.
10. Can a bad PCM cause the P135B code in a 2016 GMC Sierra?
Yes, though it’s less common, a malfunctioning PCM or outdated software could cause improper voltage signals to the ignition coil circuit.
Discuss the causes and fixes for P135B 2016 GMC Sierra OBDII Code
Code P135B 2016 GMC Sierra 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.
