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-   -   2003 V6 Accord - Failed Emissions Test (https://www.hondaaccordforum.com/forum/general-tech-help-7/2003-v6-accord-failed-emissions-test-19912/)

sugargenius Jul 30, 2008 02:56 PM

2003 V6 Accord - Failed Emissions Test
 
Took car to inspector last week for annual inspection. Comes back and says can't finish as several sensors are reading "Not Ready". The specific sensors are:[/align][/align]Catalyst[/align]Evap[/align]O2 Sens[/align]EGR Sys[/align][/align]He says the battery may have been disconnected or jumped (it hadn't)recently and that reset the computer. So,drive it for 150 mi. under normal conditions and come back.[/align][/align]I drive it for a week under 'normal' conditions (~400 mi.) and go back today for followup inspection. And again, the same sensors read 'Not Ready'[/align][/align]Shop owner doesn't know what to make of it. He says to drive around for a couple more days and come back, but I don't see what that will change.[/align][/align]What should I do?[/align][/align]2003 EX Accord V6, 46k miles[/align]

JimBlake Jul 31, 2008 07:30 AM

RE: 2003 V6 Accord - Failed Emissions Test
 
Several things have to happen to set readyness.
Heres a quick summary for 03-06 Accord, if I can post...

Catalyst:
ECT sensor reading above 158 F
Stop & go driving for about 5 miles.

EVAP system:
Battery at least 10.5 v
ECT sensor reading between 176-212 F
MAP sensor reading below 46.6 kPa
VSS reading zero - engine idling
IAT sensor reading between 32-212 F

O2 sensor:
ECT sensor reading above 158 F
Stop & go driving for about 5 miles
Include steady cruising 50-62 mph for 10 second
Engine braking (throttle closed) for 5 second

EGR system:
ECT sensor reading above 176 F
Steady cruising 50-62 mph for 10 second
Engine braking (throttle closed) for 5 second
Make sure code P0401 is not showing

JimBlake Jul 31, 2008 07:31 AM

RE: 2003 V6 Accord - Failed Emissions Test
 
A few things can screw this up:
ECU backup fuse blown?
Short drives so it never warms up?
Never get to 50mph steady driving?
Never do engine-braking?


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