P0410 code
Thread Starter
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Joined: Dec 2009
Posts: 85
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P0410 code
We just changed out oil pressure unit and hour later check engine light came on for the first time.Its showing a P0410 code,secondary air injection fault.Is this just coincidence?Has Murphy struck again?What is the fix?
Racer
Joined: Sep 2008
Posts: 310
Likes: 0
From: Coral Springs Fl
Just solved a p0410 code (99 coupe, 70k miles) and want to give a little longer response because you have a good search thread name. While mine was unrelated to oil unit and I doubt yours is, (unless you disconneted the air hose between pump and check valves) someone wrote in another post to check the micro relay in fuse box next to battery and of course the air check valves might need some carb spray (search, there are a lot of other posts on what & how to do). There is also a thread comment that 0410 is always the check valves. Not true.
Was busy and didn't have time to troubleshoot, dealer diagnosis was $105 and response was replace passenger side air check valve for $600
After realizing 0410 is emissions related and not critical for driving or safety, did troubleshoot myself.
I actually did repace driver side check valve (about $15), sprayed pass side and changed air pump (about $60)before finding micro relay suggestion. Take a look inside fuse box next to battery, believe Air Pump is #37 but look at key code on inside cover. There are identical relays in fog lamp and I believe horn. Swap relays to see if that clears 0410. I swapped with fog lamps and found fog lights wouldn't work with bad relay and of course 0410 was fixed. That's what my prob was. If relay, about $15. A whole lot cheaper than $600
Was busy and didn't have time to troubleshoot, dealer diagnosis was $105 and response was replace passenger side air check valve for $600
After realizing 0410 is emissions related and not critical for driving or safety, did troubleshoot myself. I actually did repace driver side check valve (about $15), sprayed pass side and changed air pump (about $60)before finding micro relay suggestion. Take a look inside fuse box next to battery, believe Air Pump is #37 but look at key code on inside cover. There are identical relays in fog lamp and I believe horn. Swap relays to see if that clears 0410. I swapped with fog lamps and found fog lights wouldn't work with bad relay and of course 0410 was fixed. That's what my prob was. If relay, about $15. A whole lot cheaper than $600
Last edited by Florida99; Dec 6, 2010 at 09:08 AM.
Pro
Joined: Aug 2010
Posts: 593
Likes: 9
From: San Antonio Texas
Find a tuner and have the parameters changed so that the system never checks itself and it never throws a code. I did this after a month of frustration replacing parts and spending money. The whole AIR system is a crock and does absolutely nothing for your car.
Le Mans Master
Joined: Nov 2009
Posts: 6,882
Likes: 234
From: Bangkok, Thailand
Just solved a p0410 code (99 coupe, 70k miles) and want to give a little longer response because you have a good search thread name. While mine was unrelated to oil unit and I doubt yours is, (unless you disconneted the air hose between pump and check valves) someone wrote in another post to check the micro relay in fuse box next to battery and of course the air check valves might need some carb spray (search, there are a lot of other posts on what & how to do). There is also a thread comment that 0410 is always the check valves. Not true.
Was busy and didn't have time to troubleshoot, dealer diagnosis was $105 and response was replace passenger side air check valve for $600 After realizing 0410 is emissions related and not critical for driving or safety, did troubleshoot myself.
I actually did repace driver side check valve (about $15), sprayed pass side and changed air pump (about $60)before finding micro relay suggestion. Take a look inside fuse box next to battery, believe Air Pump is #37 but look at key code on inside cover. There are identical relays in fog lamp and I believe horn. Swap relays to see if that clears 0410. I swapped with fog lamps and found fog lights wouldn't work with bad relay and of course 0410 was fixed. That's what my prob was. If relay, about $15. A whole lot cheaper than $600
Was busy and didn't have time to troubleshoot, dealer diagnosis was $105 and response was replace passenger side air check valve for $600
After realizing 0410 is emissions related and not critical for driving or safety, did troubleshoot myself. I actually did repace driver side check valve (about $15), sprayed pass side and changed air pump (about $60)before finding micro relay suggestion. Take a look inside fuse box next to battery, believe Air Pump is #37 but look at key code on inside cover. There are identical relays in fog lamp and I believe horn. Swap relays to see if that clears 0410. I swapped with fog lamps and found fog lights wouldn't work with bad relay and of course 0410 was fixed. That's what my prob was. If relay, about $15. A whole lot cheaper than $600
Thanks for the info! The search function is a great thing!
Tech Contributor
Joined: Jan 2007
Posts: 19,450
Likes: 1,155
From: Dyer, IN
Le Mans Master
Joined: Nov 2009
Posts: 6,882
Likes: 234
From: Bangkok, Thailand
Searching around it appears that the pressure diagphram in the pump goes gad and can cause this. I'll check that out Wednesday evening.
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