P0135 2015 GMC Sierra Code - HO2S Heater Performance Bank 1 Sensor 1
Quick Answer
Heated Oxygen Sensors (HO2S) are used for fuel control and post catalyst monitoring. Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1, Heated Oxygen Sensor Bank 1 Sensor 1 harness is open shorted, Heated Oxygen Sensor Bank 1 Sensor 1 circuit poor electrical connection. 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 2015 GMC Sierra 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 Bank 1 Sensor 1 harness is open shorted, Heated Oxygen Sensor Bank 1 Sensor 1 circuit poor electrical connection.
- 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 2015 GMC Sierra Description
The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the HO2S 1 heater current is out of factory specifications.
What are the Possible Causes of the DTC P0135 2015 GMC Sierra?
- Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1
- Heated Oxygen Sensor Bank 1 Sensor 1 harness is open shorted
- Heated Oxygen Sensor Bank 1 Sensor 1 circuit poor electrical connection
- Heated Oxygen Sensor Bank 1 Sensor 1 circuit fuse
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0135 2015 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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0135 2015 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 P0135 2015 GMC Sierra Code
What does OBDII code P0135 mean on a 2015 GMC Sierra?
P0135 indicates an issue with the oxygen sensor heater circuit for Bank 1, Sensor 1. The heater helps the sensor reach operating temperature for accurate readings.
What are the symptoms of code P0135 on a 2015 GMC Sierra?
Symptoms may include a check engine light, poor fuel efficiency, rough idling, and increased emissions.
What causes the P0135 code on a 2015 GMC Sierra?
Common causes include a faulty oxygen sensor, damaged wiring or connectors, blown fuse, or issues with the ECM (engine control module).
How do I fix code P0135 on a 2015 GMC Sierra?
Repairs may involve replacing the oxygen sensor, checking and repairing wiring or connectors, replacing a blown fuse, or addressing ECM issues.
Can I drive my 2015 GMC Sierra with a P0135 code?
While your vehicle may still be drivable, ignoring the code can lead to reduced fuel efficiency and potential damage to the catalytic converter over time.
How do I diagnose the P0135 code on a 2015 GMC Sierra?
Use an OBDII scanner to confirm the code, then inspect the oxygen sensor, heater circuit wiring, connectors, and fuses for damage or failure.
Which oxygen sensor is affected by code P0135 on a 2015 GMC Sierra?
Code P0135 specifically refers to the oxygen sensor located on Bank 1 (the side with cylinder 1) upstream of the catalytic converter.
How much does it cost to fix code P0135 on a 2015 GMC Sierra?
Repair costs vary but typically range from $150 to $400, depending on whether parts like the oxygen sensor or wiring need replacement.
Can a dirty or clogged catalytic converter cause code P0135 on a 2015 GMC Sierra?
A clogged catalytic converter is not a direct cause of P0135, but prolonged issues with the oxygen sensor could lead to catalytic converter damage.
Will replacing the oxygen sensor always fix code P0135 on a 2015 GMC Sierra?
Not always. The issue could be with the wiring, connectors, fuse, or ECM, so a thorough diagnosis is essential before replacing parts.
Discuss the causes and fixes for P0135 2015 GMC Sierra OBDII Code
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