10-27-2018, 08:08 AM
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#1
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Registered User
Join Date: Jun 2018
Location: Portland, TX
Posts: 55
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Tracking down Fault codes
Team,
I need some help on some fault code issues. Recently I had some serious misfires on the 99 Boxster. It was misfiring so badly that it would barely run. I replaced all the plugs and coils, and now it runs great, but I have a CEL on with the following codes:
P0102
P0112
P0154
P0302
P1318
I know several of these indicate misfires, which I believe may be holdovers, but with the two MAF codes and the Oxy sensor code I'm wondering if there is a common thread, or if they also could be holdovers.
Timeline: Within last 100 miles - new coils, filled up with gas, misfiring gone, but CEL on.
Thanks in advance,
Aaron
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10-27-2018, 08:13 AM
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#2
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Registered User
Join Date: Mar 2014
Location: So Cal
Posts: 299
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You did clear all codes didn't you?
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10-27-2018, 09:04 AM
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#3
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Registered User
Join Date: Jun 2018
Location: Portland, TX
Posts: 55
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I tried, I'm trying to use an SCT tuner to clear the codes (my code reader was recently stolen), and its not recognizing that there are CEL codes.
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10-27-2018, 11:48 AM
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#4
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Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,605
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Quote:
Originally Posted by Aanic
Team,
I need some help on some fault code issues. Recently I had some serious misfires on the 99 Boxster. It was misfiring so badly that it would barely run. I replaced all the plugs and coils, and now it runs great, but I have a CEL on with the following codes:
P0102
P0112
P0154
P0302
P1318
I know several of these indicate misfires, which I believe may be holdovers, but with the two MAF codes and the Oxy sensor code I'm wondering if there is a common thread, or if they also could be holdovers.
Timeline: Within last 100 miles - new coils, filled up with gas, misfiring gone, but CEL on.
Thanks in advance,
Aaron
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P0102: MAF sensor, below lower limit; break in wiring, short to ground
P0112: Intake air temp below lower limit; faulty sensor, short to ground, break in wiring
P0154: O2 sensor ahead of cat on bank 2; sensor failure, wiring harness problem
P0302: Misfire on cylinder 2
P1318: No such code
__________________
“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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10-29-2018, 11:04 AM
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#5
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Registered User
Join Date: Oct 2018
Location: Redondo Beach
Posts: 46
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What's the name of the document that breaks down all the trouble codes and gives you the troubleshooting steps for each? I'd like to get my hands on it because I know I'll be in the same position as the OP sooner or later!
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10-29-2018, 11:53 AM
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#6
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Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,605
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Quote:
Originally Posted by Boleador
What's the name of the document that breaks down all the trouble codes and gives you the troubleshooting steps for each? I'd like to get my hands on it because I know I'll be in the same position as the OP sooner or later!
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You need the factory OBD II manual, now out of print, it sold for around $2K when it was released.
__________________
“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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