LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Dtc-66

Thread Tools
 
Search this Thread
 
Old Apr 1, 2009 | 05:59 PM
  #1  
7.0 camaro's Avatar
Thread Starter
Launching!
 
Joined: May 2007
Posts: 216
Likes: 0
From: knoxville tn
Default Dtc-66

anyone had this code before. it says A/C pressure transducer open/short.

would that be my high pressure switch? what the hell are they talking about. just thought if i would see if anyone had that before and whats some common issues with the a/c on the early lt1's. thanks for any help
Reply
Old Apr 1, 2009 | 06:21 PM
  #2  
RamAir95TA's Avatar
TECH Senior Member
iTrader: (2)
 
Joined: May 2005
Posts: 9,467
Likes: 8
From: South Jersey
Default

Originally Posted by 7.0 camaro
anyone had this code before. it says A/C pressure transducer open/short.

would that be my high pressure switch? what the hell are they talking about. just thought if i would see if anyone had that before and whats some common issues with the a/c on the early lt1's. thanks for any help
DTC 66 is set when the AC pressure drops below 8psi (.12v signal, red/black wire) or exceeds 448psi (4.86v). There is a 5v reference voltage wire (gray).

Also check to make sure the plug isn't busted or has broken wires. It's located on the A/C line near the passenger side shock tower.
Reply
Old Apr 1, 2009 | 06:56 PM
  #3  
7.0 camaro's Avatar
Thread Starter
Launching!
 
Joined: May 2007
Posts: 216
Likes: 0
From: knoxville tn
Default

the plug seems to be fine. i hooked a jumper and on one it idles up and the other the fan comes on. i wonder if that sensor just went bad.
Reply
Old Apr 1, 2009 | 11:21 PM
  #4  
7.0 camaro's Avatar
Thread Starter
Launching!
 
Joined: May 2007
Posts: 216
Likes: 0
From: knoxville tn
Default

i jumped the relay and the compressor kicked on. i'll go to work tomarrow and get my test light and ohm meter and figure it out. supposed to hit 80 tomarrow here so kit would be nice to get it working. i'll post up what i find.
Reply




All times are GMT -5. The time now is 03:49 AM.

story-0
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-1
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-2
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-3
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-4
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-5
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-6
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-7
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE
story-8
Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0

The world was a better place when it was still around.

By Brett Foote | 2026-01-23 09:20:37


VIEW MORE
story-9
10 Reasons the LS7 Is GM's Most Extreme Naturally Aspirated V8 Engine Ever

Slideshow: The 7.0-liter LS7 was designed for absolute cutting-edge performance.

By Verdad Gallardo | 2026-01-07 18:36:00


VIEW MORE