Hey guys! im getting more problems with my maxima (suprise huh?)

Well i put a new set of fuel injectors, ignition coil, and a IACV . I turn it on and the idle speed is below 500 rpms! super low (it was never this low before). And while reversing, it would drop a bit. I drove around and once i got to my house, it died. (it was still on the road, but the front half was on the drive way). Turned on the car and went inside and parked it. Turned it on a couple of times and it would die. Confused, i tried it again, the rpms were around 700 this time, so that was good. Drove without any problems. (i guess the engine had to get use to the new IACV).

i got 2 codes though


0201 Ignition signal circuit
0205 Idle speed control

what in the world is ignition signal circuit? I tried looking it up on ebay but found nothing.

and what the heck is idle speed control?!?! I thought it was the IACV (heard it on maxima forums). This problem is killing me! I cant find any solution for it.

Thanks for the help guys

 

maybe a vacuum leak?

 

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

 

0205
That code is specifically related to either the IACV or harness.

 

thanks maximized98

I just fixed my cylinder misfire with fuel injectors, my car isnt viabrating from missfiring, il put on my old ignition coil and see if it works.... But i dont know what else is wrong with the IACV.. i just installed a new one and thought it was goood :\

 

Have you tested the connector and the harness back to the ECU? Followed the diagnostics per the FSM?

Cleared the codes to see which came back?

 

how would the ignition signal circuit and idle speed control effect the car? The rpms are like 800 so i think its okay to drive, engine sounds good.

But how would not fixing the ignition signal circuit and idle speed control effect the car? (yes i repeated the question)