AutoCodes – GMC – P1154 GMC

P1154 GMC Code - HO2S Transition Time Ratio Bank 2 Sensor 1

Quick Answer

The Powertrain Control Module (PCM) continuously monitors the Heated Oxygen Sensor (HO2S) activity for 100 seconds. Common causes include Faulty Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1, Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 harness is open or shorted, Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 circuit poor electrical connection. 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: P1154 GMC indicates HO2S Transition Time Ratio Bank 2 Sensor 1.
Common causes: Common causes include Faulty Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1, Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 harness is open or shorted, Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 circuit poor electrical connection.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 4,536

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 03, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1154 GMC Description

The Powertrain Control Module (PCM) continuously monitors the Heated Oxygen Sensor (HO2S) activity for 100 seconds. During the monitor period the PCM counts the number of times that the HO2S responds from rich to lean and from lean to rich and adds the amount of time it took to complete all transitions. With this information, an average time for all transitions can be determined. The PCM then divides the rich to lean average by the lean to rich average to obtain a ratio.

OBDII Code P1154 GMC - HO2S Transition Time Ratio Bank 2 Sensor 1 - AutoCodes.com — P1154 GMC Code - HO2S Transition Time Ratio Bank 2 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P1154 GMC?

Faulty Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1
Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 harness is open or shorted
Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 circuit poor electrical connection

How to Fix the DTC P1154 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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1154 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.

Need more information about the P1154 GMC code?

Need more information on how to fix the P1154 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1154 GMC code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1154 GMC Code

1. What are the common symptoms of OBDII code P1154 on a GMC vehicle?

- Common symptoms include poor engine performance, reduced fuel efficiency, rough idling, and possible stalling.

2. What does the OBDII code P1154 HO2S Transition Time Ratio Bank 2 Sensor 1 mean for a GMC vehicle?

- This code indicates that there is an issue with the transition time ratio of the oxygen sensor in Bank 2 Sensor 1, which measures the air-fuel mixture.

3. What are the possible causes of OBDII code P1154 on a GMC vehicle?

- Possible causes include a faulty oxygen sensor, vacuum leaks, exhaust leaks, fuel system issues, or problems with the engine's air intake system.

4. How can I diagnose the OBDII code P1154 on my GMC vehicle?

- Diagnosing this code typically involves using an OBDII scanner to read the code, checking the oxygen sensor's wiring and connections, and inspecting for any leaks or issues in the exhaust system.

5. Can I still drive my GMC vehicle with OBDII code P1154 present?

- It is not recommended to drive your vehicle with this code present, as it can lead to further engine damage and decreased performance.

6. How can I repair OBDII code P1154 on my GMC vehicle?

- Repairing this code often involves replacing the oxygen sensor in Bank 2 Sensor 1, addressing any leaks or issues in the exhaust system, and ensuring proper functioning of the fuel and air intake systems.

7. Is it necessary to reset the OBDII code P1154 after completing repairs on a GMC vehicle?

- Yes, it is important to reset the code after completing repairs to see if the issue has been successfully resolved and to prevent the Check Engine light from staying illuminated.

8. How much does it typically cost to repair OBDII code P1154 on a GMC vehicle?

- Repair costs can vary depending on the specific issue causing the code, but replacing the oxygen sensor and addressing related issues can range from $200 to $500 at a repair shop.

9. Can a DIY enthusiast fix OBDII code P1154 on a GMC vehicle?

- While some experienced DIY enthusiasts may be able to address this code themselves by replacing the oxygen sensor, it is recommended to consult a professional mechanic for proper diagnosis and repair.

10. How often does OBDII code P1154 occur in GMC vehicles?

- OBDII code P1154 is not a common code in GMC vehicles, but it can still occur due to various factors affecting the oxygen sensor and fuel mixture ratios.