What does P1154 mean on a Chevy?

P1154. Heated oxygen sensor transition time ratio bank 2 sensor 1. Sensor response time is out of range. Applies to Silverado, Sierra, Tahoe, Yukon with 4.8L, 5.3L V8 1999 to 2006. Camaro, Firebird with 5.7L LS1..

What causes P1154 on a Chevy?

Worn bank 2 upstream oxygen sensor Small exhaust leak on bank 2 Sensor heater fault Wiring or connector corrosion Engine running lean on bank 2

How do I fix P1154 on a Chevy?

Check bank 2 exhaust for leaks Inspect wiring and connector Test sensor heater and response Fix mixture faults first Replace bank 2 sensor 1 sensor

Code

P1154

Heated oxygen sensor transition time ratio bank 2 sensor 1

Category: Powertrain - Fuel/Air Metering
Severity: Check Engine Light
Applies to: Silverado, Sierra, Tahoe, Yukon with 4.8L, 5.3L V8 1999 to 2006. Camaro, Firebird with 5.7L LS1.
Related: No single generic twin. See OBD Codes List

What it means

P1154. Heated oxygen sensor transition time ratio bank 2 sensor 1. Sensor response time is out of range. This Chevy-enhanced code applies to Silverado, Sierra, Tahoe, Yukon with 4.8L, 5.3L V8 1999 to 2006. Camaro, Firebird with 5.7L LS1..

Findings, check these first

Worn bank 2 upstream oxygen sensor
Small exhaust leak on bank 2
Sensor heater fault
Wiring or connector corrosion
Engine running lean on bank 2

Standard procedure

Check bank 2 exhaust for leaks
Inspect wiring and connector
Test sensor heater and response
Fix mixture faults first
Replace bank 2 sensor 1 sensor

Look up another code

Press / to jump to the box. Chevy-enhanced powertrain, body, chassis and network codes.

Sources and review

Review: checked against the recorded source material.

OBDII Code P1154 CHEVROLET - HO2S Transition Time Ratio Bank 2 Sensor 1 | Engine-Codes.com
archived reference page (engine-codes.com via Wayback Machine)
Supports: code identity and Chevrolet application
Fetched directly. Bank 2 sensor 1 transition time ratio matches the catalog response time fault. Model and year fitment remain curator claims.

Last updated 2026-09-25.

Report a correction for P1154. Include your vehicle, the issue and a source if you have one.

This fault is part of the Chevy P1xxx fuel and ignition codes guide. It covers the family and the order to check it.