AutoCodes – Generic – P1154

P1154 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 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.

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Code Popularity 19,722

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

What does this mean?

What are the Possible Causes of the DTC P1154?

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?

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 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 Makes

P1154 Acura — HO2S Transistion Time Ratio 21
P1154 Audi — Manifold Switch Over Malfunction
P1154 Buick — HO2S Transition Time Ratio Bank 2 Sensor 1
P1154 Cadillac — HO2S Transition Time Ratio Bank 2 Sensor 1
P1154 Chevrolet — HO2S Transition Time Ratio Bank 2 Sensor 1
P1154 Chrysler — Fuel Rail Pressure Malfunction Rail Pressure Is Too Low
P1154 Dodge — Fuel Rail Pressure Malfunction Rail Pressure Is Too Low
P1154 Ford — Bank 2 Fuel Control Shifted Rich
P1154 GMC — HO2S Transition Time Ratio Bank 2 Sensor 1
P1154 Honda — HO2S Transistion Time Ratio 21
P1154 Hyundai — HO2S 21 Transistion Switch Time Fault
P1154 Isuzu — H02S Transition Time Ratio Bank 2 Sensor 1
P1154 Jeep — Fuel Rail Pressure Malfunction Rail Pressure Is Too Low
P1154 KIA — HO2S 21 Transistion Switch Time Fault
P1154 Mazda — Bank 2 Fuel Control Shifted Rich
P1154 Pontiac — HO2S Transition Time Ratio Bank 2 Sensor 1
P1154 Saturn — HO2S Transition Time Ratio Bank 2 Sensor 1
P1154 Subaru — HO2S11 Sensor Circuit Range/Performance Low
P1154 Volkswagen — Manifold Switch Over Malfunction

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.