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.
EVAP Emission Control System Monitor & Readiness Code
2004 Acura 3.5RLSECTION EVAP Emission Control System Monitor & Readiness Code
WARNING: This page is about a different car, the 2003 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Enable criteria includes: Battery voltage is 8 volts or higher. A/T in "N" or "P" position. Engine stopped.
- Connect Honda PGM Tester or the HDS to DLC. See Figure .
- Start engine. Select EVAP test in INSPECTION menu. Then select FUNCTION TEST.
- Check OBD status screen for EVAP DTCs P0442, P0456 and P0457 in the DTCs menu.
- If they are passed , the readiness code is set. If they are not passed, go to next step.
- If readiness code is not complete, check for a temporary DTC. If there is no DTC, one or more of enable criteria was not met; repeat procedure.
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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.