AutoCodes – Chevrolet – P135B 2018 Chevrolet Silverado

P135B 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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.

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Code Popularity 1,147

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 13, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P135B 2018 Chevrolet Silverado Description

The ignition system uses an individual ignition coil for each cylinder. The Engine Control Module (ECM) monitors the ignition voltage from the fuse to the individual coils. The Diagnostic Trouble Code (DTC) will be set if the ECM detects less than 2.5 V on the ignition coil supply voltage circuit.

OBDII Code P135B 2018 Chevrolet Silverado - Ignition Coil Supply Voltage Circuit Bank 2 - AutoCodes.com — P135B 2018 Chevrolet Silverado Code - Ignition Coil Supply Voltage Circuit Bank 2

What does this mean?

What are the Possible Causes of the DTC P135B 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado code?

Need more information on how to fix the P135B 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P135B 2018 Chevrolet Silverado Code

1. What does the OBDII code P135B mean on a 2018 Chevrolet Silverado?

Code P135B indicates an issue in the ignition coil supply voltage circuit for Bank 2, which may affect engine performance.

2. What are the common symptoms of the P135B code?

Symptoms include engine misfires, rough idling, reduced power, poor fuel economy, and possibly an illuminated check engine light.

3. What causes the P135B code to appear?

Common causes include damaged wiring or connectors in the ignition coil circuit, a faulty ignition coil, a failed powertrain control module (PCM), or issues with the supply voltage.

4. How is Bank 2 identified on a 2018 Chevrolet Silverado?

Bank 2 refers to the side of the engine opposite Bank 1, typically the side without cylinder 1. For V8 engines, it is usually the passenger side.

5. Can a faulty ignition coil trigger the P135B code?

Yes, a malfunctioning ignition coil on Bank 2 can cause this code by disrupting the supply voltage circuit.

6. How can I diagnose the P135B code on my Silverado?

Start by visually inspecting the ignition coil wiring and connectors on Bank 2. Use a multimeter to check for proper voltage and continuity, and test the ignition coil for faults.

7. Is it safe to drive with the P135B code?

Driving with this code is not recommended, as it can lead to engine misfires, reduced performance, and potential damage to other components like the catalytic converter.

8. What repairs are needed to fix the P135B code?

Repairs may include replacing a faulty ignition coil, repairing damaged wiring or connectors, or reprogramming/replacing the PCM if needed.

9. How much does it cost to repair a P135B code on a 2018 Chevrolet Silverado?

Repair costs vary depending on the issue but typically range from $100 to $300 for ignition coil replacement or wiring repairs. PCM replacement may cost more.

10. Can a weak battery cause the P135B code?

Yes, a weak or failing battery can cause voltage supply issues, potentially triggering this code. Ensure the battery and charging system are functioning properly.