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.
1993 Acura Integra GS-RFACTORY OEM SERVICE PROCEDURE
Code 1: Ho2S
- Turn ignition off. Remove BACK-UP fuse (7.5-amp) from underhood fuse/relay box for 10 seconds to reset ECM. Start engine, and warm it to normal operating temperature.
- Road test vehicle. With M/T in 4th gear (A/T in 2nd), accelerate at wide open throttle for at least 5 seconds and then decelerate, with throttle fully closed, for at least 5 seconds.
- If MIL is not on, problem is intermittent. Check for poor connections at HO2S and ECM connector. If MIL is on and Code 1 is indicated, go to CODE 43.
Factory Service Tools
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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.
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