P135B 2018 Chevrolet Silverado Code - Ignition Coil Supply Voltage Circuit Bank 2
Quick Answer
The P135B diagnostic trouble code (DTC) in a 2018 Chevrolet Silverado specifically refers to an issue with the Ignition Coil Supply Voltage Circuit in Bank 2. Common causes include Faulty ignition coil, Wiring harness issues, Loose or corroded connections. 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 Faulty ignition coil, Wiring harness issues, Loose or corroded connections.
- 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 2018 Chevrolet Silverado Description
The P135B diagnostic trouble code (DTC) in a 2018 Chevrolet Silverado specifically refers to an issue with the Ignition Coil Supply Voltage Circuit in Bank 2. This code indicates that there is a problem with the voltage supply to the ignition coil on the bank 2 side of the engine. The ignition coil is a crucial component responsible for converting the low voltage from the battery into the high voltage needed to spark the spark plugs, which in turn ignite the air-fuel mixture in the combustion chambers.
Common Causes of P135B 2018 Chevrolet Silverado
- Faulty ignition coil
- Wiring harness issues
- Loose or corroded connections
- Faulty power supply
- Electrical system malfunctions
Symptoms of P135B 2018 Chevrolet Silverado
- Engine misfires
- Rough idling
- Hesitation or surging during acceleration
- Loss of power
- Difficulty starting the vehicle
How to Fix P135B 2018 Chevrolet Silverado
- Begin by diagnosing the specific cause of the issue by using a scan tool to read the DTC and checking the ignition coil, wiring harness, connections, and power supply.
- If the ignition coil is faulty, replace it with a new one and ensure proper installation.
- Check the wiring harness for any damage or wear and repair or replace as needed.
- Inspect all connections related to the ignition coil supply voltage circuit, ensuring they are secure and free of corrosion.
- Test the power supply to the ignition coil and address any issues with the electrical system.
Cost to Fix P135B 2018 Chevrolet Silverado
The typical repair costs for addressing the P135B code in a 2018 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, replacing an ignition coil can cost between $100 and $300, while addressing wiring harness or connection issues may range from $50 to $200. Labor costs can add an additional $80 to $150 per hour, with the total repair cost potentially amounting to several hundred dollars. It's important to note that labor rates can vary based on location, vehicle make and model, and the specific diagnosis and repair process required. Be sure to consult with a trusted auto repair shop to get an accurate estimate for your particular situation.
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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.
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