AC Acting up
Thread Starter
Instructor
Joined: Jun 2005
Posts: 128
Likes: 16
AC Acting up
My AC is acting up. It started yesterday. I noticed that the driver's side is throwing semi warm air (that’s the best way I can describe it), even though I set the temp down to 60 degrees. It does this while driving. When stopped and idling, I notice the air gets colder. Even more strange though, is that the passenger side does not have this problem ast all. The air coming out of that side is cold.
Today, I got some codes. They are:
10PCM
P0157 H C
P0300
Could the condition these codes represent be causing the AC to be acting up only on the driver’s side?
I don’t know if this is could be related to this but my turn signals have been acting up too, since yesterday. Sometimes they work and at times they don’t. Yesterday and today, on the freeway, they stopped working, then suddenly, a few minutes later, while still on the freeway they started working again.
Any thoughts or ideas as to what could be going on?
Thanks for your help.
Today, I got some codes. They are:
10PCM
P0157 H C
P0300
Could the condition these codes represent be causing the AC to be acting up only on the driver’s side?
I don’t know if this is could be related to this but my turn signals have been acting up too, since yesterday. Sometimes they work and at times they don’t. Yesterday and today, on the freeway, they stopped working, then suddenly, a few minutes later, while still on the freeway they started working again.
Any thoughts or ideas as to what could be going on?
Thanks for your help.
Heel & Toe
Joined: Jul 2005
Posts: 22
Likes: 0
Check and see if you have a code in 99-HVAC B0441 H
This means the Left Actuator is out of range
I had the same problem. I found a thread that said if you have any 99-HVAC codes to clear them even if they are listed as history (that's what the H stands for) and it would fix the problem. I had code B0441 H and B0337 H I cleared them both and my problem was solved. When you clear B0441 H listen for the actuators resetting and wait until you don't hear them anymore then clear the others.......
I started my car turned on the AC and all vents blew cold air! I live in Texas so you can see I'm over joyed
that it fixed my warm air (driver), cold air (passenger) issue!!!! 
Good luck!!!
97C5 Owner
This means the Left Actuator is out of range
I had the same problem. I found a thread that said if you have any 99-HVAC codes to clear them even if they are listed as history (that's what the H stands for) and it would fix the problem. I had code B0441 H and B0337 H I cleared them both and my problem was solved. When you clear B0441 H listen for the actuators resetting and wait until you don't hear them anymore then clear the others.......
I started my car turned on the AC and all vents blew cold air! I live in Texas so you can see I'm over joyed
that it fixed my warm air (driver), cold air (passenger) issue!!!! Good luck!!!
97C5 Owner
Race Director
Joined: Apr 2001
Posts: 19,329
Likes: 15
From: Saint Augustine, FL
Mid-TN Events Coordinator
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16
Sounds like a vacuum leak. I didn't see anything about the year of your car, but if it's a pre-2001, you should probably pull the battery and make sure it isn't leaking. There is a vacuum hose right under it (along with your PCM and wiring harness!!!) Very common problem, which can become expensive if it's not caught in time.
Drifting
Joined: May 2003
Posts: 1,328
Likes: 3
From: Las Vegas Nevada
Originally Posted by 97C5 Owner
Check and see if you have a code in 99-HVAC B0441 H
This means the Left Actuator is out of range
I had the same problem. I found a thread that said if you have any 99-HVAC codes to clear them even if they are listed as history (that's what the H stands for) and it would fix the problem. I had code B0441 H and B0337 H I cleared them both and my problem was solved. When you clear B0441 H listen for the actuators resetting and wait until you don't hear them anymore then clear the others.......
I started my car turned on the AC and all vents blew cold air! I live in Texas so you can see I'm over joyed that it fixed my warm air (driver), cold air (passenger) issue!!!!
Good luck!!!
97C5 Owner
This means the Left Actuator is out of range
I had the same problem. I found a thread that said if you have any 99-HVAC codes to clear them even if they are listed as history (that's what the H stands for) and it would fix the problem. I had code B0441 H and B0337 H I cleared them both and my problem was solved. When you clear B0441 H listen for the actuators resetting and wait until you don't hear them anymore then clear the others.......
I started my car turned on the AC and all vents blew cold air! I live in Texas so you can see I'm over joyed
that it fixed my warm air (driver), cold air (passenger) issue!!!! Good luck!!!
97C5 Owner
Racer
Joined: Apr 2005
Posts: 327
Likes: 0
From: My house in the middle of my street GA
Originally Posted by 97C5 Owner
Check and see if you have a code in 99-HVAC B0441 H
This means the Left Actuator is out of range
I had the same problem. I found a thread that said if you have any 99-HVAC codes to clear them even if they are listed as history (that's what the H stands for) and it would fix the problem. I had code B0441 H and B0337 H I cleared them both and my problem was solved. When you clear B0441 H listen for the actuators resetting and wait until you don't hear them anymore then clear the others.......
I started my car turned on the AC and all vents blew cold air! I live in Texas so you can see I'm over joyed that it fixed my warm air (driver), cold air (passenger) issue!!!!
97C5 Owner
This means the Left Actuator is out of range
I had the same problem. I found a thread that said if you have any 99-HVAC codes to clear them even if they are listed as history (that's what the H stands for) and it would fix the problem. I had code B0441 H and B0337 H I cleared them both and my problem was solved. When you clear B0441 H listen for the actuators resetting and wait until you don't hear them anymore then clear the others.......
I started my car turned on the AC and all vents blew cold air! I live in Texas so you can see I'm over joyed
that it fixed my warm air (driver), cold air (passenger) issue!!!! 97C5 Owner
1. How do you pull the codes you talked about in your answer?
2. How do you clear the codes once you pull them?
Any help you can give would be greatly appreciated.
Good luck!!!
Drifting
Joined: May 2003
Posts: 1,328
Likes: 3
From: Las Vegas Nevada
Originally Posted by J's Toy
I have this same problem on my 2000. Two quick questions:
1. How do you pull the codes you talked about in your answer?
2. How do you clear the codes once you pull them?
Any help you can give would be greatly appreciated.
Good luck!!!
1. How do you pull the codes you talked about in your answer?
2. How do you clear the codes once you pull them?
Any help you can give would be greatly appreciated.
Good luck!!!
At the end, it will go into Manual Diagnostics. At that point, press Option button to go from module to module. When you get to an error code, press and hold the Reset button until it is cleared and displays No Code.
When done, either turn off ignition, or press E/M to exit.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
Heel & Toe
Joined: Jul 2005
Posts: 22
Likes: 0
Originally Posted by J's Toy
I have this same problem on my 2000. Two quick questions:
1. How do you pull the codes you talked about in your answer?
2. How do you clear the codes once you pull them?
Any help you can give would be greatly appreciated.
Good luck!!!
1. How do you pull the codes you talked about in your answer?
2. How do you clear the codes once you pull them?
Any help you can give would be greatly appreciated.
Good luck!!!
Here's a list of all the codes and how to pull up and reset! Got this info from another thread....
http://www.dustingarner.com/diccodes.htm
97C5 Owner
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
The P0300 code indicates that you are having MISFIRE Problems! When was the last time that you looked at your ignition system? You could have a loose wire, a bad wire, a damaged wire or plug or a leaking coil.
Recommend that you remove and inspect each sparkplug wire. Measure each wire from end to end with an ohm meter. They should read 250-750 ohms and the boots and wire insulation should be clean and free of nicks, tears and burns,
When you remove the boots from the plugs and coil towers, twist them first to break them loose and only pull from the boots! NOT THE WIRES!
When you reinstall them, apply some silicone dielectric grease on the boot ends.
How many miles do you have on the current set of plugs?
Are you getting any hesitation or engine misfires when you do any hard accerelation runs?? If so, that could be what the problem is.
Bill C
When was the last time that you looked at your ignition system? You could have a loose wire, a bad wire, a damaged wire or plug or a leaking coil.Recommend that you remove and inspect each sparkplug wire. Measure each wire from end to end with an ohm meter. They should read 250-750 ohms and the boots and wire insulation should be clean and free of nicks, tears and burns,
When you remove the boots from the plugs and coil towers, twist them first to break them loose and only pull from the boots! NOT THE WIRES!
When you reinstall them, apply some silicone dielectric grease on the boot ends.
How many miles do you have on the current set of plugs?
Are you getting any hesitation or engine misfires when you do any hard accerelation runs?? If so, that could be what the problem is.
Bill C