20 Most Recent 2003 Cadillac CTS Questions & Answers

Question edited for clarity. Question moved to model category. By disconnecting the battery, you also disconnected all the set up of the security and engine immobilizer coding. https://www.google.com/search?q=2003+cadillac+cts+security+system+reset

How do i perform the 2003 Cadillac CTS anti theft reset?

Vehicle History https://www.vehiclehistory.com > questions > how-do-... To reset the anti-theft system in your 2003 cadillac cts depress the key fob's panic button for five seconds before pressing the lock button twice standing ... 2 answers · Top answer: To reset the alarm on the 2003 Cadillac CTS You have two options. You can pop the hood and disconnect the positive battery cable, then leave it off for ... People also ask How do I get my Cadillac out of anti-theft mode?" Look for a button that allows you to slide the physical key out of the fob. Step 2: Turn the vehicle key to unlock the car door without releasing it. Hold the key for 30 seconds in this position. This will signal to your car's system that you have the right key, and will enable you to bypass your car's alarm system.

There are 2. One under the hood and one under the Drivers Left Knee under the Dash

You can effect an ECM reset by disconnecting the battery for 10 minutes. HOWEVER, then you have to reset the antitheft and alarm security system. You will need the code for your radio, and you will need to a full Drive Cycle relearn. https://www.google.com/search?q=2003+cadillac+cts+security+system+reset and after that it still might not work. You really need a mobile auto electrician with a pro grade scan tool computer. You issue is electronic, not mechanical. https://www.google.com/search?q=mobile+auto+electrician+near+me ....

The dimmer for my dash lights on my 05 Cadillac CTS is just below the sunroof control. It also turns on the interior lights. I drove this car over a year before I figured it out which was by accident!

which ever computer was changed was it flashed to your vehicle ---was the security problem before or after you throwing parts in --if before you mostly have a key or ignition problem if after---- improper install or caused a problem with the wiring or component [s]

I don't know why you would need to know this, but I can't find the information online. If I were you, I would remove the valve cover and starting from TDC I would rotate the crankshaft until I see which valves are being shut next. That will no doubt be either cylinder 2 or 3 and will tell you the next cylinder in the firing order. Some 3 cylinder engines use 123 and some 132 as their firing order, but all start with cylinder 1 at TDC.

the first thing is to make sure battery is good, if the computers in car dont have the right voltage the act crazy, they do things like the problem your having,the computer cant operate correctly with half or 3/4s power.start with battery and connection at battery. good luck,

No, this is not good

The pcv valve is at the rear of the engine on the passenger side down behind the valve covers. It's a $200.+ item that I could only find through NAPA. Other places show it but no go. It's an aluminum part nothing like the old pcv valves. It has 4 bolts that fastens it to the block.
It is a royal pain to change.
There are hoses running from it up to the plastic pieces on top of the plenum running forward. Those parts get clogged too.
I'm changing mine now and hope it cures the quart of oil every 200 mi. This is what I have read is the problem.

check the main DC power wires, for any damages...
else the there is a internal problem with the radio

Here is a diagram of the firing order.

On this website you find fuse box diagram and description for Cadillac CTS (2003 and 2005) https://www.carknowledge.info/cadillac-cts-2003-fuse-box-diagram

I have a similar problem with a 2003 cadillac cts. The water drips from the bottom area of the glove compartment. If you would stick your hand under and feel around, there is a removable panel ( two small bolts and one star screw) there , you will fell the sponge on the other side of the panel is wet. I removed this panel and ran the air conditioner and place a large mirror on the floor and shine a flash light up but did not see any water dripping.
The Driver side has a similar panel, I removed that also but saw nothing, not even the canister. But the out side pipes from the AC show the canister leads in the hood under ther driver side.
Any way I looked under the car and found the drain hose. It is located under the driver seat area. I tried fishing a coat hanger through it and it went a long way up. If you look on the side panel where the parking brake is located you will see this hose going to the top of the hood. You will need to depress the parking brake for a better view. I tried the Ac bot no condensation water came throug.
I late found a similiar hose on the passenger side. I tried to push the wire in but did not get too far.
One of these hoses drain the Sun ( moon) roof.
I then took a cap from a silicone tune ( u know the screw on tip that you cut at 45 degrees) That I inserted into the tube under car, then I insert a small funnel into the silicone cap , next with my garden ready and flowing , I force water up through the AC drain hose. Dont do too long, 5 to 7 secs is good. You will see the water come through the other drain hose. It is best to have some onlookers. Note some water might flow up to the moon roof drain and into the car so place some towel on the seat.
That works for me.
Thanks all
and good luck

Did you ever find a solution to this? I am having the same issue on 2,4,6. I have replaced the coils. checked the intake for vacuum leaks. I am lost here let me know if you find anything and I will do the same.

Assuming the information you provided is correct this http://www.modifiedlife.com/2003-cadillac-cts-car-audio-wiring-chart/ should help you good luck and thank you https://www.6ya.com/mr.mike

Most likely needs a wheel balance.

If it's 4 cylinder it's 1342, if it was ok and now wont start has immobilizer got stuck??

you have a low voltage problem. either a bad battery or a brake in a wire somewhere. My sister had the same problem in her car. Had it to the gm dealer 3 times they couldnt figure it out. I put a new battery in, new wire from batter to starter, and a new altenater and wires to it. just by dumb luck i noticed the (+) wire from the bat to the fuse box under the hood was broke at the fuse box. Put new wire on it and 2.5 years later no problems.

Don't know how you read these codes but their is no H in back . Factory service repair info. DTC B3832 or B3833 Express Up operation of the front door power windows is monitored and controlled by the front door modules, the window sensors, and the 4 connecting circuits. Each front door window motor has a window sensor mounted to it. The driver door module (DDM) and the passenger front door module (PFDM) each supply battery positive voltage and ground to power their respective window sensors. Each door module communicates with its sensor via a power window high speed serial data circuit, and a power window low speed serial data circuit. The window sensor detects differences in the window motors electrical pulses to determine if there is an obstruction to the travel of the window glass. The door modules use the information generated by the sensors to disable the Express Up movement of a window, or reverse the direction of travel, in the event that a passenger, or other obstacle, has become trapped in it. The power window low speed serial data circuit is a unique 2-way serial data link between the door module and its sensor. The actual position of the window glass, in relationship to the distance traveled by the window, is communicated via this circuit, as well as state-of-health messages and the direction in which the window is traveling. DTC B3832 may be set and the Express Up function disabled if the vehicle or the door module has recently lost power for any reason. You should first attempt to re-initialize the Express Up function. Refer to Window Motor Programming - Express Function . If DTC B3832 is accompanied by DTC U1714, utilize the DTC U1714 or U1716 diagnostic table before using this table. Refer to DTC U1714 or U1716 . DTC B1420 Battery positive voltage is supplied at all times to the seat adjuster switch and the memory seat module (MSM) through the same circuit. The MSM uses this battery voltage input to determine if battery positive voltage is applied to the seat adjuster switch. DTC B1825, B1850, B1860, B2355, B2365, or B2375 Circuit Description The position sensor that sets this DTC is attached to the seat directional motor. It receives a 5 volt reference and low reference from the memory seat module (MSM). The sensor sends a voltage signal that varies with the movement of the seat through the signal circuit to the MSM. Then based on this voltage signal, the MSM determines the position of the seat. Install a scan tool. Turn ON the ignition, with the engine OFF. With a scan tool, observe the appropriate Sensor parameter in the Memory Seat Module Sensor data list. Does the scan tool indicate that the Sensor parameter is within the specified range? 0.25-4.75 V Sure you can move the seat back . Connector # 3 at the MSM ,pin's S & N - lite green & tan wires . Give a ground to one an B+ to the other ,if it moves in wrong direction switch the wiring around ..

I have no clue what any warranty has to do with any light coming on when you first start your Cadillac. I cannot help you with your problem unless I know which light is coming on. Then, even if I knew which light was coming on, it would probably require scanning the onboard computer system in you vehicle to find out why the light is on. What would you like for me to do for you?