Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1996SUBURBAN K1500, 5.7 RREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODES - GASOLINEDIAGNOSTIC TROUBLE CODE TESTSDTC P1154 - HO2S TRANSITION TIME RATIO BANK 2, SENSOR 1DTC WILL SET WHEN THE FOLLOWING CONDITIONS ARE PRESENT
1996 Chevrolet Suburban K1500, 5.7 R
DTC will set when the following conditions are present
1996 Chevrolet Suburban K1500, 5.7 RSECTION DTC will set when the following conditions are present
- No fuel trim DTCs are set.
- Lean/rich switches are less than 30.
- Rich/lean switches are less than 30.
- No TP sensor DTCs are set.
- No EVAP DTCs are set.
- No IAT sensor DTCs are set.
- No MAP sensor DTCs are set.
- No EGR DTCs are set.
- No ECT sensor DTCs are set.
- DTC P0151, P0152, P0154 and P0155 is not set.
- Vehicle is in "closed loop" fuel control.
- HO2S voltage is .3-.6 volt.
- Throttle position is greater than 10 percent but less than 20 percent.
- Average response time calculations completed for this ignition cycle.
- Ratio of left HO2S left right/right left times greater than 64 counts.
- Ratio of left HO2S left right/right left times greater than 48 counts.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.