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2004 Honda Civic Questions

Get answers to questions about your 2004 Honda Civic at RepairPal. Find solutions, diagnose problems and get back on the road.

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143
questions

I start the car ac works fine compressor is running fine but when i start driving i not a hissing noise coming from the vents and it start to blow hot air. What's the problem?

I have a 2004 Honda Civic Ex.
Error codes are:
PO134
PO107
PO113
PO135
PO128

I need to get an oxygen sensor but I am not sure upstream or downstream? Also, I searched oxygen sensor on autozone and the prices ranged from under 100 to over 250. How do I know what I need?

We had the motor replaced just barely, and it kicked on the check engine light kicked on, and got a code read and it says that it was a exhaust deficiency or something somewhere, how do we tell what it is and what to replace? It does it whenever it's on, it vibrates B's jfmthe time. worse with the ac on, think the code we got for it doesn't

ive done a multitude of tests and replaced the compressor on my 2004 Honda civic lx. I have narrowed it down to the relay switch not getting power at the 30 pin (compressor relay under hood). I have a 2003 civic lx (AC Works) and compared all of the tests with the 04 and #30 isn't getting power. I don't know the exact verbiage of the numbers but that is the number on the relay. on the #30 with keys out of the car, it shows zero volts, but when I start the car and call for AC, 12 volts show up on #30. This doesn't happen on my 04. #30 feeds the compressor and since it is dead, the compressor never kicks on. Can you tell me what else to troubleshoot. I am a novice and pretty pleased I got to this point. Thank you

Is makes the knocking noise when I turn it on and makes it when accelerating. It doesn't stop. It's loud. What could it be? It almost sounds like a fan hitting something. The car drives great though.

Would the problem be the speed sensor or something else?

I replaced the motor in this car, the motor swap went very well. The trans mission worked perfect prior to the swap and now it has the P2770 code and the trans does not appear to shift into 1st gear. The trans feels as if it is in second gear and the drive indicator blinks all the time. fluid is up. Not sure what I could have done wrong? can you give some help?

I have a 2004 honda civic and one morning when going to work it didnt stay on as in when i turned the key it would power on but wouldnt stay on unless i was giving it gas? any help?

My car had been heating up for a while went to get it checked told it was the water pump leaking but now it wont start

My car was having trouble starting but after a few turns I have always gotten it to start. It started getting worse, meaning it would take more turns to get it to start. It also started a wheezing sound as well. A mechanic told me it was the starter motor but when I took it in today they said it was the ignition switch and after installing the ignition switch they are telling me that the starter motor is going as well. Later in the day it was having trouble starting again. I don't know that they were right about the ignition switch.

Changed raditor, thermastat, raditor cap, as i know its proably the head gasket by reading the same issues other people are having. I can here heater core water moving sometimes when turning a corner. Lack of power and just in park it will accelerate high to low alittle on its own. What can i do its a great car 133000 miles on it. checked the oil no signs of mixture and did each spark plug test. Seems just to be the resvior tank overheat steam and guggles.

At regular street speed there is no visible problem.After slowing from let's say 70 to 60 mph,To regain previous speed the engine pushes back and forth or hesitates for a few seconds until previous speed is reached. No dashboard trouble signal. Any suggestions? Thanks!

I'm having issues, and am at a deadlock. My car started overheating on about ten hours into a fifteen hour trip. I stopped, changed the thermostat (because the heat was blowing cold, thought it was stuck shut.) Let the car cool down, and finished the trip with no problems. Same thing happened on the way back home. While running a head gasket sealant, I noticed that my radiator fan wasn't working. I changed the fan switch, still wasn't working, switched the two fan relays, didn't fix the problem, changed the coolant temp sensor, Nada. I also flushed the coolant, hard wired the fan, and some other crazy things. This fan will only come on when the AC is on, and I'm at my wit's end. What am I overlooking? I'm ready to just wire a switch to the dash!

Rocker Arm Actuator System Performance or Stuck Off Bank 1