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Solved the p0302

Old 08-23-2007, 07:40 PM
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Solved the p0302

Had problem with misfire..
which is p0302

changed coils, plugs, wires...
but.. didn't solve it...

so... -_-...
did the E-shaft sensor reset
turn the key to on position..
brake tap 20 times in 8 secs...(not sure how much exact i did tho...)
then oil-p gauge goes up to middle then goes down...
turn the steering wheel lock2lock left to right (hard part -_-...s81t!)

no more misfire CEL eversince even on highway or wherever else...
hmm...works good...
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Old 08-24-2007, 12:18 AM
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you might have saved some money had you done that first ...
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Old 08-29-2007, 01:36 AM
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How do you know your car had misfire?
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Old 08-29-2007, 02:58 AM
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because the code he pulled is the obd II code for misfire.
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Old 08-29-2007, 04:15 AM
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Right but what did he do to obtain a notable or successful result?
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Old 08-29-2007, 07:39 AM
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Reset the E-shaft sensor .......
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Old 08-29-2007, 07:44 AM
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Mental note to self!
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Old 08-29-2007, 08:11 AM
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Bit simplistic...it won't work all of the time...but it is a good place to start. I always check for codes, and reset the ECU and E-sensor if there is a problem...and go from there
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Old 08-29-2007, 08:41 AM
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After I replaced my main drive belt pulley with an AP underdrive pulley I got a flashing CEL. I connected my laptop with sCANalyser (Ver 1.1.0.1beta) to read the code, but sCANalyser did not detect any CEL or malfunction with the engine. BTW, I was careful not to dislodge or remove the Eccentric Shaft Position Plate, which is behind the Main Drive Belt Pulley and held in position by it.
I tried to reset the fault code with the method described here, but instead of a flashing CEL it stayed on solid. With the solid CEL, sCANalyser was able to read the DTC code as P0302. Only now was sCANalyser able to clear the fault code. So I thought all was done, but again after a short distance the flashing CEL came back.
I tried the reset “press brake pedal” and also the “press odometer button” resets, but again the flashing CEL returned. I then removed the ‘Room Fuse’ for about 15 minutes. After I replaced the fuse and drove the car all is well, no flashing CEL.
As to why sCANalyser did not detect a flashing CEL and did not fully clear this ‘DTC’ I don’t know. Well that’s been my experience of DTC P0302.
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Old 08-29-2007, 08:43 AM
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Thanks guys
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Old 11-23-2018, 09:32 PM
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P0302 Code - Check Engine Light

I'm a new member. '06 Auto 71K bought 2 months ago (SEP2018).

Cigarette lighter plug doesn't work. Fuse (slot 1) was blown. Read online somewhere that slot 15 was a spare. Pulled it and the door lights went out. Put it back in. Bought a 15A for the slot 1 cigarette lighter plug fuse that was blown. Fixed it.

Engine light comes on after ~200miles. It was the P0302 code. Cylinder 2 misfire. Got the code read at autozone. "Coil replacement"

Searched the forum (freakin love this forum, by the way. I've been able to do a few things on my own. Amazing). Popular possible fixes are coils, spark plugs, wires, and injectors. I also came across this free fix in the forum:

did the E-shaft sensor reset
turn the key to on position..
brake tap 20 times in 8 secs.
then the oil pressure gauge goes up to middle then goes down.
Turn the steering wheel lock2lock (all the way left to all the way right.

Started it up and the code was still there. I was just going for an easy fix anyway...

Kept searching the forum.

Take out the "Room Fuse" (slot 15 as mentioned before). The door lights went out. Checked it and it was not blown. I put it back in. Door lights came back on. Started up the car and the engine light went out.

SMALL SUCCESS!!!

I'm not naive enough to think this is a fix, but the light is off and i'm going to repost in a bit after driving it to let you new owners know what happens. Just wanted to document my trial and error because that's the beauty of this owners forum.

Thank you to all the knowledgeable people on here since the RX-8 has been around since 2004. This is an amazing forum and endlessly useful. All of your input is appreciated.

Charlie
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Old 11-24-2018, 01:21 AM
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The room fuse is responsible for holding some ECU info. Pretty sure you can pull it to clear CEL, fuel trims and your trip meters.

Good to hear that your car is running well again. How long has it been misfiring, though? You may want to check your catalytic converter just to be on the safe side.
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Old 12-03-2018, 11:43 AM
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Originally Posted by UnknownJinX View Post
The room fuse is responsible for holding some ECU info. Pretty sure you can pull it to clear CEL, fuel trims and your trip meters.

Good to hear that your car is running well again. How long has it been misfiring, though? You may want to check your catalytic converter just to be on the safe side.
Not really sure how long. Only had it a couple of months and it misfired about a month ago and again on a long drive.

I ended up replacing the coils, plugs, and the wires. It's a lot more responsive now.

Next up is the starter and possibly the cat.
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