Trouble code headache
Thread Starter
Junior Member
Joined: Mar 2014
Posts: 70
Likes: 0
Car: 1991 Pontiac Firebird Formula
Engine: 305 5.0 TBI
Trouble code headache
I keep getting code 23. I have reset the computer memory and it keeps coming back. I cannot find a definitive answer anywhere as to what it is so i was wondering if you guys had any ideas. Thanks all
Joined: Nov 2010
Posts: 5,892
Likes: 84
From: Mantua NJ
Car: 1 Owner 1986 TA with a WS6 package
Engine: 5.0 EFI
Transmission: THM700R4
Axle/Gears: 277 Posi Speedo
Re: Trouble code headache
Check your Manifold Air Temp Sensor (MAT) That will give you the code 23.Resetting doesn't fix it.
Thread Starter
Junior Member
Joined: Mar 2014
Posts: 70
Likes: 0
Car: 1991 Pontiac Firebird Formula
Engine: 305 5.0 TBI
Re: Trouble code headache
Ok which one is that exactly? Is that the one that hangs off the cowling over the AC system or is that somewhere on the intake?
Joined: Nov 2010
Posts: 5,892
Likes: 84
From: Mantua NJ
Car: 1 Owner 1986 TA with a WS6 package
Engine: 5.0 EFI
Transmission: THM700R4
Axle/Gears: 277 Posi Speedo
Re: Trouble code headache
I never had any experience with a MAT Sensor, here's a diagram,it says it's the the Air Cleaner.
Thread Starter
Junior Member
Joined: Mar 2014
Posts: 70
Likes: 0
Car: 1991 Pontiac Firebird Formula
Engine: 305 5.0 TBI
Re: Trouble code headache
ok i changed out that sensor but the code is still there..even reset the memory again just to be sure...code 23 again...grrrr
Joined: Nov 2008
Posts: 2,097
Likes: 177
From: Milwaukee
Car: 92 Firebird, 77 Trans Am SE, 86 Z28
Engine: 5.7 HSR, T/A 6.6, empty
Transmission: T-5, TH350, T-5
Axle/Gears: 3.08 posi, 3.23 posi, 3.23
Re: Trouble code headache
http://www.chevythunder.com/mat_code_23.htm
This should help. Start troubleshooting. Replacing parts blindly usually just costs you money.
This should help. Start troubleshooting. Replacing parts blindly usually just costs you money.
Thread
Thread Starter
Forum
Replies
Last Post
