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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Common signs include inconsistent cooling, out-of-date software, and uneven air distribution, since the module controls the whole AC system.
How to Reset Your Check Engine Light
There are many warning lights that can illuminate on your dashboard. They can be indications of a pending failure in any number of your vehicle's systems. The Check Engine Light is...

Related questions

Question
My 4.0 engine that I had purchased before blew out and now I can't afford 4.0 engine. Could I replace the engine with small 3.3L, even if performances decrease?
Hi and thanks for contacting Your Mechanic. You can replace your vehicle with any engine size as long as the engine will bolt up to the transmission, the electrical harness will match the engine as it did on the 4.0L,...
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
Brand new motor will not start
Hi there. From the description you have provided, changing the vehicle engine, shorting the alternator and now a no start, is going to require proper diagnoses. The computer recognizing a fault in the auto shutdown relay circuit, is encouraging, the...
Question
How do you scan the GEM module in a 1996 Ford Explorer?
The GEM module can only be scanned using a scanner capable of accessing the GEM module through the OBD2 data link. The scanners that the Ford dealer uses can access the module. There are aftermarket scanners on the market than...
Question
Odometer reading is about 550,000 miles off.
Hey there. This is a problem with the Body Control Module (which keeps a copy of actual mileage) not re-updating the instrument cluster appropriately after a power outage. Contact your Saturn dealer service center for "Subject: 2000 - 2002 Saturn...
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
Check Engine Light on Dodge Ram 1500 with code P0073
Check the condition of the harness that plugs into the sensor to ensure that the sensor is staying plugged in. If you are saying that the sensor is functioning and the voltage does change, then it is possible that your...
Question
Need to know if I have to program a used motor on my 2011 Nissan Versa 1.8?
Hello. If a "same engine code" swap was performed, the issue is probably defined by whether you used a different engine computer, or plugged the new engine into your existing engine wiring harness and original computer. If you used...
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
I bought a set of aftermarket HID headlight assemblies, but I'm having doubts.
Hello. The headlights on your car are controlled by computer. If the car was not originally equipped with HIDs, the system is set to look for the voltage that standard headlights consume. That is how it determines a bulb is...
Question
Bluetooth has failed
Hello, thanks for writing in. Having to "replace the computer" seems a bit extreme. Most bluetooth issues can be resolved by turning the phone off, then back on. If you are using an iPhone, make sure "autosync" is turned off...
Question
A scanner found the code P02B4, what does it mean?
That is an interesting code since your engine only has 4 cylinders. It is possible that the vehicle has the wrong information stored in the computer and is throwing a code for a V-8 engine. I recommend having your computer...
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
Blown fuse or computer system?
Since you shorted the electrical system, you may have damaged electrical components. The main fuses that power each and every circuit on the car may have been shorted and burned out. You should first check each and every fuse in...
Question
Reprogramming
Hello. Most vehicle interfaces offer multiple languages to suit their driver's needs. You may be able to set your vehicle's language by navigating through the system's menus to to access the settings. I would refer to the owner's manual to...
Question
OD2 scanner read trouble code P0101
Your computer may not be able to correctly interpret the data from the mass airflow sensor on your engine causing the P0101 code to keep returning. The manufacturer has a Technical Service Bulletin that came out January 30th of 2015....
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...

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