OBD II code P0300-303 question
#1
09-04-2003, 03:07 PM
Join Date: Aug 2003
Location: Nearby
Age: 52
Posts: 37
Rep Power: 22 
OBD II code P0300-303 question
I started my 02 996 Cab after a torrential downpour to which the car was subjected. I got check engine OBD II codes as follows:
P0300 Random cylinder misfire detected
P0301 Cylinder #1 misfire detected
P0302 Cylinder #2 misfire detected
P0303 Cylinder #3 misfire detected
Has anyone else gotten similar codes after heavy rain?
It did not seem to hiccup on startup or act oddly but has always ran a little less spritely (no misfires felt) as it always does for the first 30 seconds until the oil gets warm. The car runs great and no differently now than when brand new. I'm just wondering if Porsche's check engine alarm threshold is a little low?
P0300 Random cylinder misfire detected
P0301 Cylinder #1 misfire detected
P0302 Cylinder #2 misfire detected
P0303 Cylinder #3 misfire detected
Has anyone else gotten similar codes after heavy rain?
It did not seem to hiccup on startup or act oddly but has always ran a little less spritely (no misfires felt) as it always does for the first 30 seconds until the oil gets warm. The car runs great and no differently now than when brand new. I'm just wondering if Porsche's check engine alarm threshold is a little low?
#2
09-04-2003, 03:24 PM
Registered User
Join Date: Jul 2003
Location: Naples, Florida
Age: 50
Posts: 1,983
Rep Power: 110 
Plenty of heavy downpours in S. Florida, never any problems before. Perhaps an engine sensor got wet or has shorted out. Better safe than sorry... if you have not already, have the dealer take a look.
#3
09-04-2003, 04:26 PM
Sounds like the Variocam (hall sensor, or ?) got wet. My Pcode trouble table (for P0300, P0301, P0302 and P0303 detected)
mentions:
mentions:
VarioCam does not switch over completely.
Cases have occurred in which the VarioCam of one bank was mechanically faulty. In these instances, the
VarioCam had not switched over completely from power to torque valve timing.
An indication of this problem is misfiring detected by the DME control module in the range of 1200 - 1500 rpm
occurring in an entire bank .
Cases have occurred in which the VarioCam of one bank was mechanically faulty. In these instances, the
VarioCam had not switched over completely from power to torque valve timing.
An indication of this problem is misfiring detected by the DME control module in the range of 1200 - 1500 rpm
occurring in an entire bank .
#4
09-05-2003, 04:27 PM
Join Date: Aug 2003
Location: Nearby
Age: 52
Posts: 37
Rep Power: 22
Hmmm......that sounds expensive. The more I learn about variocam the more I dislike it. More parts means more parts to break I guess. I've been driving the car in various conditions for about a week since and it's run perfectly. Now that I have access to a code reader I'll keep track of any future codes....hopefully none. By the way, has anyone seen the OBDII code reader/reset that works with the Palm pilot for about $250 including the module, cable to Palm, and free software updates? Sounds like a steal as my brother paid about $2000 for his shop unit. Anybody used it or something of similar price? Also, Loren, where did you get your P code tables, on the web?
#5
09-05-2003, 10:40 PM
Yes. They are part of my http://www.AllDataDIY.com subscription. BTW... my OBDII scan software runs on a laptop, came with the cable has free updates and is only $125!
http://www.obd-2.com Not a fancy web page but great software for the price.
http://www.obd-2.com Not a fancy web page but great software for the price.
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