'93 Recurring CEL / SES
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Joined: Jun 2015
Posts: 52
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'93 Recurring CEL / SES
Hi,
Pulled codes tonight, quite a few and i'm waiting for the service manual to come from overseas, wondering if anyone has their manual handy to help with a few codes?
1. C25 H25 H72 H74
4. H44
No major issues, apart from only ~400-500kM (250-300Miles) out of a full tank of 98 octane. I pulled the 02 sensor about a year ago and they looked black, i'm thinking the CEL is related, this light only comes on after it's warmed up and generally persists, some day's it doesn't.
Pacemaker long tubes / SLP Intake (3K&N/s)
The previous owner has disconnected something for the under hood lighting - but it's not a fuse so i'm assuming it's cut somewhere.
Pulled codes tonight, quite a few and i'm waiting for the service manual to come from overseas, wondering if anyone has their manual handy to help with a few codes?
1. C25 H25 H72 H74
4. H44
No major issues, apart from only ~400-500kM (250-300Miles) out of a full tank of 98 octane. I pulled the 02 sensor about a year ago and they looked black, i'm thinking the CEL is related, this light only comes on after it's warmed up and generally persists, some day's it doesn't.
Pacemaker long tubes / SLP Intake (3K&N/s)
The previous owner has disconnected something for the under hood lighting - but it's not a fuse so i'm assuming it's cut somewhere.
Last edited by Hive; Aug 16, 2016 at 07:13 AM.
Team Owner
Joined: Sep 2003
Posts: 25,412
Likes: 2,745
Hi,
Pulled codes tonight, quite a few and i'm waiting for the service manual to come from overseas, wondering if anyone has their manual handy to help with a few codes?
1. C25 H25 H72 H74
4. H44
No major issues, apart from only ~400-500kM (250-300Miles) out of a full tank of 98 octane. I pulled the 02 sensor about a year ago and they looked black, i'm thinking the CEL is related, this light only comes on after it's warmed up and generally persists, some day's it doesn't.
Pacemaker long tubes / SLP Intake (3K&N/s)
The previous owner has disconnected something for the under hood lighting - but it's not a fuse so i'm assuming it's cut somewhere.
Pulled codes tonight, quite a few and i'm waiting for the service manual to come from overseas, wondering if anyone has their manual handy to help with a few codes?
1. C25 H25 H72 H74
4. H44
No major issues, apart from only ~400-500kM (250-300Miles) out of a full tank of 98 octane. I pulled the 02 sensor about a year ago and they looked black, i'm thinking the CEL is related, this light only comes on after it's warmed up and generally persists, some day's it doesn't.
Pacemaker long tubes / SLP Intake (3K&N/s)
The previous owner has disconnected something for the under hood lighting - but it's not a fuse so i'm assuming it's cut somewhere.
http://tech.corvettecentral.com/2011...trouble-codes/
Where are you located? I've sent you a PM.
Under-hood lights are fused "in-line" I'm quite sure at the LH(driver side) SideMarker/Cornering lamp. Should be an easy find!
Snapshot here I believe is correct:
https://www.corvetteforum.com/forums...post1592847462
Last edited by WVZR-1; Aug 16, 2016 at 07:41 AM.
Melting Slicks
Joined: Jan 2014
Posts: 2,478
Likes: 254
From: Downers Grove Illinois
The only code that is concerning is the following:
44 Oxygen Sensor (Left Bank Lean)
The most likely issue is a bad oxygen sensor.
The under hood lighting has been disabled on my '92 as well the PO disconnected the connectors, so I can always plug them back in if I like.
44 Oxygen Sensor (Left Bank Lean)
The most likely issue is a bad oxygen sensor.
The under hood lighting has been disabled on my '92 as well the PO disconnected the connectors, so I can always plug them back in if I like.
Le Mans Master
Joined: Sep 2013
Posts: 6,192
Likes: 750
From: near the thumb in the mitten
the ccm dtc 25 relates to courtesy lights. The 72 & 74 dash LEDs - aftermarket radio can cause those. TSB #93-68-9A may help
Ecm dtc44 look for vacuum leaks near battery and at vacuum check valve right side of intake.
Ecm dtc44 look for vacuum leaks near battery and at vacuum check valve right side of intake.
