P0135 2016 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 2016 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 2016 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 2016 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 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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0135 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 P0135 2016 GMC Sierra code?
Need more information on how to fix the P0135 2016 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0135 2016 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0135 2016 GMC Sierra Code
What does the OBDII code P0135 mean for a 2016 GMC Sierra?
P0135 indicates a malfunction in the heater circuit of the oxygen sensor (HO2S) on Bank 1 Sensor 1, which is responsible for monitoring the air-fuel mixture.
What are the symptoms of code P0135 on a 2016 GMC Sierra?
Symptoms may include the check engine light turning on, poor fuel economy, rough idle, or increased emissions.
What causes the P0135 code to appear?
Common causes include a faulty oxygen sensor, damaged wiring or connectors in the sensor circuit, a blown fuse, or an issue with the ECM.
How do I diagnose the P0135 code?
Start by inspecting the wiring and connectors for damage, test the heater circuit for continuity, and check the sensor's resistance using a multimeter.
Can I drive my 2016 GMC Sierra with the P0135 code?
While the vehicle is typically drivable, prolonged driving with this code can lead to increased emissions and potential damage to the catalytic converter.
How do I fix the P0135 code?
Repairs may include replacing the faulty oxygen sensor, repairing damaged wiring, checking and replacing fuses, or addressing ECM issues if necessary.
How much does it cost to fix the P0135 code?
Replacing the oxygen sensor typically costs $150 to $400, depending on parts and labor. Wiring repairs or ECM replacements may cost more.
Is Bank 1 Sensor 1 upstream or downstream?
Bank 1 Sensor 1 is the upstream oxygen sensor, located before the catalytic converter on the side of the engine with cylinder 1.
Can a bad oxygen sensor cause the P0135 code?
Yes, a defective oxygen sensor heater element is one of the most common reasons for the P0135 code.
How do I prevent the P0135 code from occurring again?
Regular maintenance, inspecting wiring, and replacing oxygen sensors at recommended intervals can help prevent this issue from reoccurring.
Discuss the causes and fixes for P0135 2016 GMC Sierra OBDII Code
Code P0135 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.
