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 MANUALSCHEVROLET1997CHEVY EXPRESS G3500, VAN CARGO, 6.5 FREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 18 (ENGINE CONTROLS - TESTS W/CODES - 7.4L (G SERIES))DIAGNOSTIC TROUBLE CODESDTC P1153 - HO2S INSUFFICIENT SWITCHING BANK 2, SENSOR 1RESPONSE TEST ENABLE
1997 Chevrolet Chevy Express G3500, Van Cargo, 6.5 F
Response Test Enable
1997 Chevrolet Chevy Express G3500, Van Cargo, 6.5 FSECTION Response Test Enable
WARNING: This page is about a different variant/trim than selected.
- Closed-loop low MAP not active.
- Closed-loop Mode 0 not active.
- DTCs P0151, P0152, P0154 and P0155 not active.
- Vehicle is in "closed-loop" operation.
- ECT is greater than 135°F (57°C).
- Engine run time greater than 75 seconds.
- MAF is greater than 15 gm/s with engine at less than 3000 RPM.
- Canister purge duty cycle is greater than zero percent.
- Conditions are present for greater than 2 seconds.
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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.