ddk

Hi Rob. I recently learned the WRX doesn't have an EGR solenoid so there's nothing I can check there. As for the knock sensor I haven't thrown any other codes than that P0304. My initial two P0400 and C0300 codes were incorrectly reported due to a software bug and there really was only the one P0304 code. However, thanks for the heads-up on the knock sensor and it's relation to these misfires. Derrick

Hi Rob. I recently learned the WRX doesn't have an EGR solenoid so there's nothing I can check there. As for the knock sensor I haven't thrown any other codes than that P0304. My initial two P0400 and C0300 codes were incorrectly reported due to a software bug and there really was only the one P0304 code. However, thanks for the heads-up on the knock sensor and it's relation to these misfires. Derrick

*as posted on nasioc* Finally threw another CEL today and it turned out to be a P0304 (cylinder #4 misfire). Turns out that my software is broken due to a simple parsing error. Sheesh. Last time I threw a P0304 it was a bad plug (stock Champions) so I replaced them with NGK 6962's and it hasn't thrown it again until this week. Only have 15k km on those plugs...hmmm. I have a new set of 6962's that I'll put in but I'm a little surprised to see this code rear it's head again. Derrick

I've also posted these codes to the nasioc board and there is some debate as to whether the codes I read were correct as they don't make sense to anyone. I'm going to wait until I throw a CEL again and then read it with a different piece of software which hopefully will shed some light on the problem. I'll report back when I know more! Thanks. Derrick

It was a steady CEL in both cases. I've cleared the codes twice now and they re-occured within a couple days so any day now they should reappear. Thanks for the response. Derrick

Hello. I have recently thrown a couple codes in a stock '02 WRX 2.0l MT and am hoping somebody has seen them before. The first was a 'C0300' which I think is listed as a "Rear Speed Sensor Malfunction" but could be wrong. I've never thrown a chassis code before and after asking the local Stealership about it they have never heard of this code. The second code was a 'P0400' which I believe is a "Exhaust Gas Recirculation Flow Malfunction". This code has occured twice and occurred after starting the car and driving it a short distance (less than 1km) at very low speed (30km/h) and it threw the CEL when I got off the throttle for a stop sign. I've scoured the net and various board's trying to find someone else who has seen either of these issues on a WRX with no luck. If anyone could point me in the right direction for either or both of these codes it would be appreciated! Derrick