[Z06] Check Engine Light but no current codes
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Joined: Oct 2013
Posts: 94
Likes: 19
From: Greenville SC
Check Engine Light but no current codes
CEL came on in my '03 Z06 on Saturday. I just got around to running the codes in the DIC, and they're all H codes, so I have no idea what's causing the CEL. Here are the codes it gave me:
P0171 H
B2282 H
B2284 H
U1255 H
U1064 H
U1016 H
U1096 H
B2283 H
B2285 H
I've had the car for almost 3 months, and this is the first time the CEL has come on. I don't know if the codes were ever cleared by any previous owner, so I have no idea how old they are.Only mods are a vararam intake which was on the car when I bought it, and a corsa exhaust that I had put on. I had the valve springs and spark plugs replaced two weeks ago. The car feels normal and isn't running rough or making any weird noise.
Any insight as to what caused the light to come on would be greatly appreciated!
P0171 H
B2282 H
B2284 H
U1255 H
U1064 H
U1016 H
U1096 H
B2283 H
B2285 H
I've had the car for almost 3 months, and this is the first time the CEL has come on. I don't know if the codes were ever cleared by any previous owner, so I have no idea how old they are.Only mods are a vararam intake which was on the car when I bought it, and a corsa exhaust that I had put on. I had the valve springs and spark plugs replaced two weeks ago. The car feels normal and isn't running rough or making any weird noise.
Any insight as to what caused the light to come on would be greatly appreciated!
Instructor
Joined: Jul 2016
Posts: 220
Likes: 62
From: Nova Scotia, Canada
Melting Slicks
Joined: Sep 2011
Posts: 2,258
Likes: 543
From: Appleton WI
As an FYI, the codes will switch to H when you turn the ignition off. To determine which codes are Current, you must check the codes while the engine is still running.
If you want, you can clear the existing codes by going into the manual diagnostic mode. Press the reset button on each module that has a code.
Glad it was an easy fix for you. MANY CELs are due to a loose fuel cap. Not just Corvette either. One of the first questions I ask people who contact me about a CEL is if they recently filled up. Odds are good they did. So no harm no foul in my book.
If you want, you can clear the existing codes by going into the manual diagnostic mode. Press the reset button on each module that has a code.
Glad it was an easy fix for you. MANY CELs are due to a loose fuel cap. Not just Corvette either. One of the first questions I ask people who contact me about a CEL is if they recently filled up. Odds are good they did. So no harm no foul in my book.
Melting Slicks
Joined: Sep 2011
Posts: 2,258
Likes: 543
From: Appleton WI
It is an emissions issue. The gas fumes are going past the cap instead of being routed to the charcoal canister and later burned.
