Alarm problems?

I have a 2003 honda civic type r, the factory alarm is doing it's best to ruin my sleep. The problem is when the temperature outside goes to -5 C the alarm goes off. My first thought was the battery, so it was changed and the new tested so all is good there. As I can't lock the car without the alarm activating I have a problem. Can you please help. Dave in the UK

Will give it a try Many Thanks

I recently installed a new engine for my 02 civic and everything was running perfect for 2 weeks. While driving the car it suddenly begin to die. I noticed the battery light blink quickly then turned off and the CEL came on "battery is red top optima". When attempting to accelarate the car acts like its not getting enough gas. Pulled over on the side of the road I start the car and it will idle roughly but my green key light coninues to blink while the car is running and of course the CEL remains on. My gauges such as heat and rpm do not work. Borrowed a code reader "AutoXray easy read 2000 OBD2" to pull some codes but with the key in the ii spot the reader is not getting a response from the ECM/PCM. I'm thinking my ECM is dead and I need a new one but I have a friend that works at honda and says he never had to change a ECM and to check my grounds. I checked all the grounds I could find so the ground from the battery to frame is good. Transmission to frame is good and the one on the thermostat to frame is good. I have undone and redone all of them and checked them with a continuity tester. Contacted my local honda dealer for parts and found there is a seperate unit for the immobilizer unit at the iginition and I'm wondering if this could be the cause. Any help is greatly appreciated.

I did try my other key and the issue still accurs. Very consistant.

So it turns out the PCM/ECM was the cause. I purchased a used ECM from a junk yard out of a 03 Civic $77. After I installed it the car wouldn't turn over (immobilzer not giving it gas). I plugged in my old ECM dangling as I drove it 30 miles in limp mode (can't go over a certain RPM) to honda planet. All I requested was for them to program the ECM to my keys I already had the new ECM installed. That cost $100. Total $177. Not bad considering if I just had Honda do everthing it would have been $600 for ECM, 11/2 laber $150. So I hope that answers some peoples questions.

I have just replaced the head gasket on my 2002 civic lx 1.7L. I had the negative battery cable disconnected while doing the job and now the immobilizer light in the dash is flashing and engine will not start. Engine cranks fine and Im 100 percent positive the engine is in time. I have not gotten the key wet and do not understand why the car is not recognizing the same key that has been used for 5 years. My car also has a viper security system but I don't believe it is interfering. I know the immobilizer system is disabling the engine because I have no arc at the coils. Owners manual indicates that if this system is activated the engine will not receive fuel or ignition. Apparently the dealer is inept and has no clue what the car is doing unless I bring it in. Is there anything else I can do to get this car to bypass immobilizer without having it towed to the dealer? Thanks in advance.

Joe

I have found the problem. The ecu ground wire had no connection. Solved all of my problems.

I have the same issue. Do you remember what you did to fix it?