03 Civic check engine light HELP!!!

Hey. Does anyone know what could cause my check engine light to go on? I took the car to Auto Zone where they diagnosed it and it gave a code saying "System voltage too high for the current engine operating conditions." I tried replacing the alternator, the battery, and the ignition relay thats in the back of the glove box, all with no luck. Can anyone help? At least give me some ideas to try.

You really expect people to help you with the way you've come up in here aaaaaaaahahhahahahahaaaaaahahahah

... :grinno: nope

GScivic and BrodyP... at least dont act like you know what the problem is because I know you dont. May your life be like toilet paper - long and useful.

do you know the exact code?

Yeah. It's P0563. The thing is... the car was wrecked and wires were torn apart and probably shorted too. I put them together and it was all perfect untill after like 150 miles. I've been driving with it for about 4k miles already. It still drives perfect and has no problems but I hate that light.

Get that alternator tested. Sounds like the regulator is out on it.

I did already. The voltage on the alternator is something like 14.7 which is normal. I even tried swapping with another civic.

P0563 Engine Control Module (ECM)/Powertrain Control Module (PCM) Power Source Circuit
Unexpected Voltage

Could be several things depending on different sensors. From my experiences
This usualy causes MIL on ur 02 cat sensor. But I assume you have a cat. A bored hollow cat would generate the same type of code. Why?? beats me..
HIGH voltage ( 15.8 to 16.5 volts ). Triggers the SRS.
The SRS goes through its initial start up check OK, (ie light comes on says on for 10 seconds and then shuts off) then the SRS is OK. If the SRS light then comes on later during driving, check the regulated voltage. If it is high, think about replacing your alternator which you did.

High voltage can adversely affect other components .. if you "toast" the ECU on high voltage be ready for a BIG repair bill!

Shit if the car was wrecked bad what do you expect? SELL IT!

Im not sure what MIL stands for and the cat sensor is on the bottom right not bay 1 or 2? Cuz DXs dont have an O2 sensor on the bottom. They have 2 on the front of the engine and thats it. When you say it triggers the SRS, what do you mean? I dont even have airbags, they were blown in an accident and the light is normally on. The only mod I have on my car is the exhaust, do you think it might be something associated with that?

Thats right DX is much different then the EX I am talking from my experience having my cat delete inserted throws the same code. Bye SRS I mean the flashing check engine light. Where are your airbags? you never eplaced. Ths car seems like is been through hell .

Well, I bought my car at an auction, totalled. So yeah, it has been through hell. It was wrecked so bad that I had to replace the transmission which was shattered. But considering the whole car cost me 3500 when I sold my 2000 EX for 7000, I think its great. I could buy airbags but thats another 500 or more and I dont really need them.

I have just figured out that I dont have a cat. That might actually be the problem. Im gonna try swapping exhausts. Thanks for the help.

I put the stock exhaust on. Same problem. Must be something else.

General Description
If there is a short to ground in the harness between the engine control module (ECM)/powertrain control module (PCM) and
the PGM-FI main relay 1, the PGM-FI main relay 1 stays ON even though the ignition switch is OFF, thus the ECM/PCM
remains active. However, the engine is not running because the power for the gauges, the ignition, and the fuel pump is
switched OFF by the ignition switch. In this detection, it is determined that a malfuncion cannot be detected due to the active
ECM/PCM despite the ignition switch being in the OFF position, and the MIL will be illuminated when the ignition switch is
turned ON the next time.
If the IG1 voltage is a specified value or less despite the ECM/PCM being in operation, a malfunction is detected and a DTC
is stored.

Thats the basic reason for the code you have comming on. Since the car was wrecked i wouldn't be surprised if a wire is pinched or rubbed through somewhere.

Your barking up the wrong tree by looking for a cat or O2 problem.

By the way how many people died in this car?

5.Disconnect ECM/PCM connector E (31P).

6.Turn the ignition switch ON (ll

7.Measure voltage between ECM/PCM connector terminal E7 and body ground.


Is there battery voltage?

YES - Go to step 12.

NO - Go to step 9.

9.Remove the glove box.

10.Remove PGM-FI main relay 1 (A).

11.Check for continuity between ECM/PCM connector terminal E7 and body ground.


Is there continuity?

YES - Repair short in the wire between the ECM/PCM (E7) and PGM-FI main relay 1.■

NO - Replace PGM-FI main relay 1.■

12.Reconnect ECM/PCM connector E (31P).

13.Measure voltage between ECM/PCM connector terminal E7 and body ground.


Is there battery voltage?

YES - Go to step 14.

NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.■

14.Disconnect ECM/PCM connector A (31P).

15.Measure voltage between body ground and ECM/PCM connector terminals A3 and A2 individually.


Is there battery voltage?

YES - Go to step 16.

NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.■

16.Remove the glove box

17.Remove PGM-FI main relay 1 (A).

18.Measure voltage between body ground and ECM/PCM connector terminals A3 and A2 individually.


Is there battery voltage?

YES - Repair short to power in the wire between the ECM/PCM (A2, A3) and PGM-FI main relay 1.■

NO - Replace PGM-FI main relay






Thats the diag follow it and see where it takes you.

Hey. Thanks for the info but I tried that already. Throughout the procedure, it turns out that I have like 2volts where it says theres not supposed to be voltage. But even if there is a short... how do I find it?
And what makes you think someone died in the car? Its not like a plane fell on it.

Well you either have battery voltage or continuity. so if you have 2 volts werer they ask for battery voltage then the answer is no. If you check for continuity its not posible to have vltage if you have the test meter on the right scale.

Its just a figure of speach. A car wrecked that bad must have fatality's.

Well... if I answer no to that then it comes down to either replacing the main relay or the control module. I tried the main relay... doesnt help... tried control module from 2004, doesnt start... I think it has to be reprogrammed to match the chip in the key. Does anyone know how much the module will cost from the dealer?

No... there were no fatalities. It was wrecked pretty bad, but not that bad, plus the airbags went off and the seatbelts locked up. I mean... it wasnt wrecked up to the interior.

Lets start from scratch.
step seven. With the meter on 12 volt DC scale and the positive probe in pin E7 and the negative probe on a good ground what do you get as a reading?