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Discussion Starter · #1 ·
so as i was driving today 3rd gear no problems CEL flashes on so i ran a check with my ap
PCM- p0421
IC- u0100, u2064, u0101
TPMS- u0100
ABS- u1900

anyone else getting codes like this?
 

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well i checked trouble codes in autoenginuity:
p0421 - Warm up cat efficiency below threshold (bank1)
u100 - lost communication with ECU/PCM A
u2064 - unknown
u0101 - lost communication with TCM
u1900 - unknown
 

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Discussion Starter · #3 ·
you think there anything big? or should i just clear them and see if they come back
 

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If you lose communication with Ecu that seems pretty damn big. Hmm I would double check everything under the hood and see if there is anything out of place. Are you tuned with a standback or something?
 

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Wiat i am an idiot you said ap. Seem like somthing may have went wrong with your ap. Maybe you should ask cobb and see what they say?
 

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Honestly, no idea. But then I'm not a mechanic either.

Well warm-up cat efficiency isn't something I would worry about right now. It's more of an emissions issue than anything else. Don't know if you care/need to pass emissions.

U-codes are communication. It seems like the ECU crapped out for a moment or something and then TPMS and ABS complain. Anyone know what IC stands for?
 

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Discussion Starter · #7 ·
what is pcm/tcm? i went out and looked at the car and cant find anything wrong/out of place. car starts fine runs good. brakes work tpms light is not on. im lost ill be sending cobb a message in the AM.
 

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PCM = Powertrain Control Module
TCM = Transmission Control Module

What TCM do we have in this car?
edit: I think of TCM as something that controls the trans (shift points, engagement, etc). What TCM do we have in this car? Clutch switch and neutral switch?
 

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TCM in this case would be Traction Control Module, which is tied into the ABS system.

Don't have a Transmission Control Module in a manual...

Is your ABS light on?

Kind of sounds like to me the AccessPort screwed up the ECU. But before we jump to conclusions on that, go get the codes scanned with something other than the AccessPort, autozone can do a free code scan. I'm kind of curious if the ABS and ECU codes were a fluke that the AccessPort picked up, and they aren't actually there. Because quite honestly, I don't think the AccessPort is capable of reading ABS codes. Most affordable code readers aren't, you typically need to have an ABS code scanner that runs around $500 to read ABS codes. I know my DashHawk and AutoXray code scanners can't. In order to get a CEL reader that reads ABS codes as well, the cheapest one I've seen costs around $1000. So it seems kind of fishy to me.
 

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Discussion Starter · #10 ·
ill run by auto zone tonight on my way back from work and see how that goes. and no no other lights are on besides the CEL(abs, traction, brakes)

:(WTF
 
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