does anyone know what it means to get this code. its ignition signal circuit. what needs to be replaced. or tuned. i recently replaced my spark plugs and thats it. any help would be appreciated

 

0201
Diagnostic Trouble Code 0201 indicates a problem with the ignition coil and power transistor. The ignition signal from the Engine Control Module is sent to and amplified by the power transistor. The power transistor turns on and off the ignition coil primary circuit. This on-off operation induces the proper high voltage in the coil secondary circuit.

The malfunction is detected when the ignition signal in the primary circuit is not entered during engine cranking or running.

The items to check include
- Harness or connectors (the ignition primary circuit is open or shorted.)
- Power transistor unit built into ignition coil
- Condenser
- Crankshaft Position Sensor (REF)
- Crankshaft Position Sensor (REF) circuit

A misfire on any individual cylinder should set a code, and a problem with the CPS should also set a code.

I would have expected to see DTC 0201 along with one of the following DTCs.
0407 - Crankshaft Position Sensor (REF)
0608 - Cylinder 1 misfire
0607 - Cylinder 2 misfire
0606 - Cylinder 3 misfire
0605 - Cylinder 4 misfire
0604 - Cylinder 5 misfire
0603 - Cylinder 6 misfire

You didn't get one of these "companion" DTCs, and that is puzzling. Maybe one of them will show up in the next few days.






I would say you must have used some crappy plugs(anything other than NGK) or your plugs are not gapped correctly.

 

I got NGK's and i am not getting any of these other codes. i got the copper ones. the only think is i know everyone says a certain part number for our car and when i went to advanced auto to get mine the number was different. could that be the problem. the ngk website had a different part number.

 

That is probily the problem. Put your old plugs back in and see fi the code goes away.

Try to find the correct plugs, check at other places for them.

 

"I used NGK Copper Plugs for my replacement. This is optional, the maxima is recommended to run with Platinum Plugs, however copper provides a better spark and the only down side is it will only last for 30k instead of 60k for platinum plugs. The Nissan Part # for these plugs are 22401 - 50Y05. you can walk into any Nissan Dealership and give them this part number for these copper plugs. The NGK name for the plugs are NGK V-Power Copper BKR5E-11, all this information was obtained from Bill from Maxima.org" - - From www.sprintmax.com

 

I just changed my plugs last night and got the exact same code. I figured mine was from compression testing the cylinders. The coils had to be unplugged when I was cranking it over. Haven't taken the car for a spin yet since I reset the ECU. We'll see what happens.
Not sure why yours would have tripped that code if you didn't turn over the engine when you were replacing yours.

I used NGK Iridium BKR5EIX-11

 

well i did. dumb me started the car without reconnecting the back 3 plugs. the car only ran for about 20 sec. before i noticed. but why would it continually come on?

 

You mean after you reset the ECU it gives a CEL again?

 

yep the same code.

 

Check all hte wireing and make sure you didn't pull anything.
Also check hte stuff the list says to.