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zeldhead

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Discussion starter · #1 ·
Hey all,

This is my first post. Thanks in advance for your thoughts and suggestions!
Our 2007 v6 (205,880 km) was running great. My wife took it in for an oil change during which they also replaced the air filter, which apparently was pretty dirty. At any rate ... we went camping right after and while away, the check engine, VSC, and 4wd lights came on. As soon as we got back we took it in to run a diagnostic ($109 to retrieve the codes and run the diagnostic! an aside: anyone have a suggestion on a budget code reader?), which brought up three codes:

P0102 - Mass or volume flow sensor
P0113 - Intake Air Temperature Circuit High Input
P2195 - O2 Sensor Signal Biased/Stuck Lean

I tried cleaning the mass air flow sensor, let it dry, and then cleared the warning lights by disconnecting the battery but they came back on a day later. My next step was going to be purchasing a mass air flow sensor and an O2 sensor and replace them myself (quoted just over $800 for Canadian Tire to do it! the mass airflow sensor change is $390 ... i mean that thing takes like two seconds to take out and replace!), but something keeps nagging at me. It seems strange to me that these codes would pop up right *after* changing the air filter (especially since problems with the sensors are caused by dirty filters). Does this seem strange to any of you? Any chance these are being caused by some mistake made while replacing the filter? A loose intake? Something?

Any thoughts/suggestions greatly appreciated!

Cheers
 
Discussion starter · #3 ·
thanks @2011RAV4 for the link!

i disconnected the battery for a while, which turned the warning lights off. does this also clear the codes or do i need to do that with a code reader? or perhaps pulling the EFI and ETCS fuses?

cheers.
 
#4 ·
Double check around the air filter box to make sure they didn't unplug a connector or a hose of some type. You can get a simple code reader from Amazon for less than $20. Everybody who owns a car should have one.
 
#5 ·
Discussion starter · #6 ·
JuneBug said:
Double check around the air filter box to make sure they didn't unplug a connector or a hose of some type.
Click to expand...
Yes, good suggestion. I'll check this afternoon!

JuneBug said:
You can get a simple code reader from Amazon for less than $20. Everybody who owns a car should have one.
Click to expand...
I saw your review of three code readers in the link above. I've been meaning to get one for a while. I'm on it straight away. Cheers.
 
Discussion starter · #7 ·
eodgator said:
Do you have an aftermarket oiled air filter, they can play hell with MAP and MAF sensors. Check out the prices for parts online, neither part is hard to install but try diagnosing instead of remove and replace. Get the output values of the sensors and test them before throwing your money away. Test don't guess...
Click to expand...
thanks, eodgator. Good reminders/suggestions.
 
#8 ·
Get yourself a code reader and clear the codes. Then see which one comes back first.

My experience, at least with RAV4s, is codes come on in groups almost like some don't want to be left out so they come on with their "friends."

IMO Toyota does it to make the owner panic and run to the dealer credit card in hand saying, "Please fix all the things wrong with my baby!"
And I certainly wouldn't start taking things apart when the car is running fine even tho the CE light may come on.
 
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#9 ·
Honestly, I have a feeling that something wasn't put back together after the filter replacement. The codes read would indicate an air leak (or vacuum). I would check the wires going to the MAF connector, make sure none a broken/pulled out. Check the hose from air box to TB and those clamps, check the vacuum hoses on the box and one going from valve cover PCV to TB.

I will be in London on Thu and could bring my scanner, but I suspect that the codes will be the same ones as those you listed above. The scanner I have is: https://www.amazon.ca/Actron-CP9125...t=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1002200&hvtargid=pla-571542206341&psc=1
 
#10 ·
zeldhead said:
thanks @2011RAV4 for the link!

i disconnected the battery for a while, which turned the warning lights off. does this also clear the codes or do i need to do that with a code reader? or perhaps pulling the EFI and ETCS fuses?

cheers.
Click to expand...



Clears the light but stores the code in memory still. A code reader can only erase the codes. An inexpensive ELM327 code reader will work. Uses Android Torque Pro app. Check EBAY.
 
#11 ·
Couldn't you have gone to AutoZone for a free code read? They wont reset the system, but they will try to sell you a part they think is defective. It's like on my Tacoma. I had a cracked exhaust manifold and a hole in my catalytic converter, but they told me my air sensor was bad. But it was free.


Seriously, invest in your own reader. Do not trust mechanics, especially at Joe's tire shop. Get second and third opinions. Get the first from the fine folks here to get an idea of how to proceed.
 
#12 ·
Stoker-AZ said:
Couldn't you have gone to AutoZone for a free code read? They wont reset the system, but they will try to sell you a part they think is defective. It's like on my Tacoma. I had a cracked exhaust manifold and a hole in my catalytic converter, but they told me my air sensor was bad. But it was free...
Click to expand...
Sadly, in Canada, we don't have shops or stores that offer free OBD scans...
 
#13 ·
#14 ·
check vacum hose

once i took a car in for a belt replacement. the next morning the choke wouldn't work. come to find the the guy who had my car had taken a razor blade and sliced the underside of one of my hoses then slipped it back on. so the adv person would have taken it back and he would have charged me only 250 to rebuild my perfectly good carb. so take every vacuum hose loose from both ends and carefully inspect it for a small slice.if it was done on purpose it will in plane sight so they could fix it easy.
 
#15 ·
zeldhead said:
thanks, eodgator. Good reminders/suggestions.
Click to expand...

Please do not let Canadian Tire ppl or Jiffy Lube guys to work on your car- these are pass-through places with low pay, there's nobody there to 'own' the result.



When I lived in GTA I couldn't find good local mechanic and simply started servicing / repairing them myself. Years later I eventually came across couple places I'd trust to work on my cars, both by references. Both were naturally busy and by that time I was able to do almost everything myself anyways.
 
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