U2064 cel

[BlueStreak]

Hi guys,

Earlier this week, I had a CEL go off in my '07 Speed. Checked the AccessPort and it gave me a U2064 code while driving on the highway (there is no explanation as to what a 2064 code is on the AccessPort). I was watching KR the entire way and it was at 0, had a look at the LTFTs; +30% (wow). Meanwhile, the car felt like it was running fine.

Anyways, I shut down the car and started it up roughly 2 hours later. Checked the LTFTs again. They were back at +/- 5% (I didn't do anything to the car in the mean time). Didn't think much of it so I cleared the code and kept driving. The next day, it came back. LTFTs are still at +/- 5%.

I'm at a loss. I have no idea what's up though I feel like I should check for boost leaks. Should I look into replacing the spark plugs? My engine has 35K KM on it on the originals.

Has anyone had this happen?

Dave

[BlueStreak]

Just read this from phillyb on MSF.org


you're the 6th person with ap throw u2064. i think that code means there are other codes, but the ecu for some reason can't see them.
if you look here - Diagnostic Trouble Code (DTC) U2064 Definition - it says that for mazdas - Warning Indicator Requested by Another Control Module...
so something is trying to send a code, but something, perhaps the ap itself, it interrupting that code.
off the top of the dome, the others i can recall are bio, corbs, and superv

I'm on a Stage 2 +SF v1.05 map. From what I understand, the CEL that gets thrown as a result of an aftermarket downpipe was permanently defeated. Maybe it has to do with that?

Dave

[MPS]

yaa i think that it i get that code all the time
so COBB blocked the p0421 cat warm up code and this is trowing the code

[spd frk]

I get the same U2064 code at random intervals a couple times a month also. It is a code that says the ECU is trying to communicate a code. It must be because Cobb defeated the pre-cat warmup code. You can just ignore it and erase it with the AP.

[midz97]

Yeah I just wipe it off when it happens but it is kinda annoying.