P0135 GMC Code - HO2S Heater Performance Bank 1 Sensor 1
Quick Answer
The Powertrain Control Module (PCM) supplies a bias voltage (approximately 450 mV) on the Heated Oxygen Sensor (HO2S) signal high and low circuits. Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit fuse, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit open shorted to ground. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P0135 GMC indicates HO2S Heater Performance Bank 1 Sensor 1.
- Common causes
- Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit fuse, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit open shorted to ground.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Code P0135 GMC Description
The PCM runs the heater test only on a cold start (depends on the cumulative air flow) and only once an ignition cycle. When you start the engine the PCM monitors the HO2S voltage. When the HO2S voltage goes above or below the bias range threshold, the PCM determines how much time it took.
What are the Possible Causes of the DTC P0135 GMC?
- Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit fuse
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit open shorted to ground
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit poor electrical connection
- Faulty Powertrain Control Module (PCM)
How to Fix the DTC P0135 GMC?
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.
Code Tech Notes
User Submitted Video
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0135 GMC 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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Information for Specific GMC Models
- P0135 2014 GMC Sierra — HO2S Heater Performance Bank 1 Sensor 1
- P0135 2015 GMC Sierra — HO2S Heater Performance Bank 1 Sensor 1
- P0135 2016 GMC Sierra — HO2S Heater Performance Bank 1 Sensor 1
- P0135 2017 GMC Sierra — HO2S Heater Performance Bank 1 Sensor 1
- P0135 2018 GMC Sierra — HO2S Heater Performance Bank 1 Sensor 1
Frequently Asked Questions about P0135 GMC Code
1. What does the OBDII code P0135 for a GMC mean?
- This code indicates a malfunction in the HO2S (Heated Oxygen Sensor) Heater Performance for Bank 1 Sensor 1.
2. What are the common symptoms of a P0135 code in a GMC vehicle?
- Common symptoms include poor fuel economy, rough idling, engine misfires, and potential stalling.
3. What are the possible causes of the P0135 code in a GMC?
- Potential causes include a faulty oxygen sensor, damaged wiring or connectors, a blown fuse, or a problem with the ECM (Engine Control Module).
4. How can I diagnose the P0135 code in my GMC vehicle?
- Diagnosing the code involves inspecting the oxygen sensor and its wiring, checking the related fuses, and using a scan tool to monitor sensor data.
5. Can I still drive my GMC with a P0135 code?
- It is not recommended to drive with a P0135 code as it can lead to decreased fuel efficiency and potential damage to the catalytic converter.
6. How can I repair a P0135 code in my GMC?
- Repair options include replacing the Bank 1 Sensor 1 oxygen sensor, repairing damaged wiring or connectors, and ensuring proper ECM function.
7. Are there any DIY tips for fixing a P0135 code in a GMC?
- DIYers can start by checking the oxygen sensor's wiring and connectors for damage before considering sensor replacement or seeking professional help.
8. How much does it cost to fix a P0135 code in a GMC?
- The cost of fixing a P0135 code can vary depending on the root cause, but it typically ranges from $100 to $300 for parts and labor.
9. How often does the HO2S Heater Performance Bank 1 Sensor 1 need to be replaced in a GMC?
- Oxygen sensors typically last around 60,000 to 90,000 miles, but factors like driving conditions and maintenance practices can impact their lifespan.
10. Can a P0135 code in a GMC trigger other related trouble codes?
- Yes, a P0135 code can sometimes trigger other codes related to oxygen sensor performance, fuel mixture, or engine efficiency.
Discuss the causes and fixes for P0135 GMC OBDII Code
-
I changed the upstream sensor in my 2006 GMC Sierra. I do not have a reader, how do I reset my check engine light?
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You could try disconnecting the car battery for about 30 min. that should clear the light
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