P0133 2015 GMC Sierra Code - HO2S Slow Response Bank 1 Sensor 1
Quick Answer
The Heated Oxygen Sensors (HO2S) are used for fuel control and catalyst monitoring. Common causes include Faulty Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1, Heated Oxygen Sensor Bank 1 Sensor 1 harness is open or 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
- P0133 2015 GMC Sierra indicates HO2S Slow Response Bank 1 Sensor 1.
- Common causes
- Common causes include Faulty Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1, Heated Oxygen Sensor Bank 1 Sensor 1 harness is open or 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 P0133 2015 GMC Sierra Description
The heating elements inside each HO2S heat the sensor to bring the sensor up to operating conditions faster. This allows the system to enter Closed Loop earlier and the ECM to calculate the air-to-fuel ratio sooner.
The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the HO2S 1 rich-to-lean or lean-to-rich average response time is greater than a calibrated value for greater than 60s.
What are the Possible Causes of the DTC P0133 2015 GMC Sierra?
- Faulty Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1
- Heated Oxygen Sensor Bank 1 Sensor 1 harness is open or shorted
- Heated Oxygen Sensor Bank 1 Sensor 1 circuit poor electrical connection
- Low or high fuel system pressure
- Fuel contamination
- Faulty fuel injectors
- Exhaust gas leaks
- Engine vacuum leaks
How to Fix the DTC P0133 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 P0133 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 P0133 2015 GMC Sierra Code
1. What are the common symptoms of OBDII code P0133 (HO2S Slow Response Bank 1 Sensor 1) in a 2015 GMC Sierra?
- Common symptoms include poor fuel economy, rough idling, and potential lack of power during acceleration.
2. What can cause the OBDII code P0133 to trigger in a 2015 GMC Sierra?
- The code P0133 is generally triggered by a slow response from the oxygen sensor located in Bank 1 Sensor 1 of the exhaust system.
3. How serious is the OBDII code P0133 in a 2015 GMC Sierra?
- While the code itself may not cause immediate harm to the vehicle, it can lead to decreased fuel efficiency and potential long-term damage if left unresolved.
4. Can a dirty or faulty oxygen sensor cause the OBDII code P0133 in a 2015 GMC Sierra?
- Yes, a dirty or faulty oxygen sensor in Bank 1 Sensor 1 can contribute to the triggering of the P0133 code.
5. How can I diagnose the OBDII code P0133 in a 2015 GMC Sierra?
- Diagnosing the P0133 code typically involves using an OBDII scanner to read the code, checking the oxygen sensor's wiring, and inspecting the sensor for any physical damage.
6. What are some repair tips for fixing the OBDII code P0133 in a 2015 GMC Sierra?
- Repair tips may include cleaning or replacing the Bank 1 Sensor 1 oxygen sensor, checking for exhaust leaks, and ensuring proper electrical connections.
7. Is it safe to continue driving a 2015 GMC Sierra with the OBDII code P0133 active?
- While the vehicle may still be operable with the P0133 code, it's advisable to address the issue promptly to prevent potential damage to the catalytic converter and maintain optimal engine performance.
8. Can a mechanic reset the OBDII code P0133 without addressing the underlying issue?
- Resetting the code without fixing the root cause, such as a faulty oxygen sensor, is not a recommended practice as the issue will likely resurface, leading to further problems.
9. How much does it typically cost to repair the OBDII code P0133 in a 2015 GMC Sierra?
- The cost of repairing the P0133 code can vary depending on the exact cause of the issue, but it may involve expenses related to sensor replacement, labor, and any additional parts needed.
10. Are there any preventive measures to avoid the OBDII code P0133 in a 2015 GMC Sierra?
- Regularly scheduled maintenance, such as ensuring timely oxygen sensor inspections and replacements, can help prevent the recurrence of the P0133 code in a 2015 GMC Sierra.
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