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Symptoms of a Bad or Failing AC Control Module
Common signs include inconsistent cooling, out-of-date software, and uneven air distribution, since the module controls the whole AC system.
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Related questions

Question
The code p0102 shows up after cleaning the mass air flow sensor.
Hi and thanks for contacting Your Mechanic. The wiring harness to the mass air flow sensor (MAF) could have a break in the wires. Disconnect your battery and remove the harness to the MAF and your computer. Use a digital...
Question
I cannot find a computer with the Part #. 1860A799. Can I use another part number that looks the same?
Hi there. The part number that you have is specific to your vehicle's computer system. If you are wanting to replace the computer with an aftermarket computer, you can but you will need the computer flashed (programmed) to the VIN...
Question
Bad computer in a jeep grand cherokee
I would not take anyone's word on the problem and look into it further. Find out why they did not get it replaced to sell the vehicle? If you decide you want to chance purchasing it then get pricing first...
Question
Engine swap with Ej20x, Ecu question
I will describe a scenario that will work and you can then judge your actual circumstances based on that. The initial issue is not the "country of origin" but rather whether the block and heads are identical, in every respect,...
Question
Misfire on my engine and I am getting an injector code 27. (OBD1)
Hi there. The injector output driver is not responding properly to the control signal. Check the wiring from the computer to the injector driver. If the noid light is flashing erratically, then the controller (computer) is not functioning correctly. You...
Question
Electrical issues with the gauges, interior lights, and rear wiper blade.
Hi there. When it comes to multiple systems and the electrical circuits malfunction, there is a power and ground issue. Check the battery cables and clean them with a tooth brush and baking soda with water. This will clean off...
Question
Getting a p138b code - should I just replace the GPCM? I think a nearby lightning strike may be the culprit.
Hi there. If the codes for the engine are coming up with the glow plug control module failure, then check the module to see if there is any wiring burned or broken. If there is nothing wrong with the harness...
Question
What's the difference between the ECM and PCM?
The engine control module (ECM) controls all the engine functions to keep it running correctly monitoring all the sensors of the engine. The power train control module (PCM) will include multiple control modules in one case called a PCM. The...
Question
I put a new computer (PCM) in the car and now it won't start.
Hi there. When you had the computer shipped to you, first thing to ask is if the computer was programmed to your vehicle. If the vehicle was no programmed, you will have to get it programmed at a dealership. If...
Question
I was told that my van needs a new brain thingy and a new serpintine belt. I am wondering if it is worth fixing up.
With the information you have given it would not be able to be determined if you would have any further problems after replacing the computer. Since the vehicle is over 16 years old and has over 220k miles there is...
Question
Rebuilt 350 engine rebuilt Quadrajet carburetor with new computer. Nothing will connect to the computer, which is effecting my transmission.
Hi there. Check the wiring to the carburetor and see if the choke is coming on or staying off. The computer controlled carburetors are designed to meter the choke and fuel jets. If the wiring to the carburetor has power...
Question
PO700 code is read on a code reader.
Hi there. The computer to the transmission (TCS) has failed and is not responding to any sensors and solenoids. When the TCS fails, it shuts off power to the transmission putting it into a limp mode as if the harness...
Question
My boy accidentally hooked battery cables up wrong on his truck, and now it's got white smoke that smell like gas coming out.
When hooking up the battery cables backwards, the ground became the hot and the hot became the ground. Most likely the computer (ECM) could have failed and the fuel pump may have burned up. I recommend checking all of the...
Question
Replaced pcm in a 2011 grand caravan why won't it turn over
You will need to have the computer reprogrammed at a dealer to work on your car. The PCM is designed to only give three starts then lock you out unless reprogrammed.
Question
No power to the ignition.
When hooking up the battery cables backwards, the polarity of the voltage is reversed and will cause the fuses to pop, the alternator to burn out the regulator, and the computer (ECM) will burn up the ground circuit inside the...
Question
Replaced E38 computer on 2006 Pontiac g6. Should I try it out or does it need programming first?
The computer (ECM) will need programmed to the VIN of your vehicle before attempting to operate the vehicle. If you need further assistance with programming your computer, then seek out a professional, such as one from Your Mechanic, to help...
Question
I have a 2009 Saturn Vue had to replace the ignition switch inhooked the battery because the car got stuck in the on position I
You will need to first try to turn key to the on position and wait for 5 minutes to see if theft system turns off so the vehicle can then be started? If still will not start then you will...
Question
No bus error message on the dashboard.
No Bus refers to the data bus by which the computer (ECM) in the vehicle communicate with each other and with the various components which they read and control. There could be a broken wire, a corroded or loose connection,...
Question
I have a mazda 3 2007 and I do not know where the TCM is. It is not under the battery, so where else can be?
The transmission control module (TMC) is located directly on top of the transmission under the battery tray. If you need further assistance with replacing the TMC, then seek out a professional, such as one from Your Mechanic, to help you....
Question
My local mechanic said I need to go to the dealership to have them do the timing on my 2006 LR3 v6.
Hi there. If the code is for P0011, then there is an issue with the VVTi system. The Variable Valve Timing solenoids are not functioning properly. First change the engine oil and filter. Then clear the codes by removing the...

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