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Old 03-16-2013, 06:48 PM   #1
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Check Engine Codes

Hello everyone, I currently have a 2002 Mustang GT and the only modification it has is a CAI, and before I installed that I already got the Service Engine Soon light on for some time, I used my BAMA Tuner to scan the car and I got all these codes:

P1000 OBD system readiness test not complete

P0443 Evaporative Emission System Purge Control Valve Circuit

P1451 Evaporative Emission System Vent Control Circuit

P0135 O2 Heater Circuit

P0141 O2 Heater Circuit

P0155 O2 Heater Circuit

P0161 O2 Heater Circuit

P1409 EGR vacuum regulator solenoid circuit (see p0403)

P1131 Lack of H02S21 switches sensor indicates lean (see p2197)

P1151 Lack of H02S21 switches sensor indicates lean (see p2197)

I was wondering if someone could help because I really don't know a lot about cars and would line to know how to fix it.

Thanks.
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Old 03-17-2013, 05:32 AM   #2
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You can look up the codes here to see what the shop manual says about them, including possible causes and diagnostic tips.

One thing that all of the "device" codes (P1443, 1451, 0135,0141, 0155, 0161 and 1409) have in common is that they all receive power via fuse #8 (20 A) in the central junction box (under the dash, you can download an owner's manual here).

That fuse being blown would cause the O² sensors to misbehave as reported by the P1131 and P1151 codes--narrowband O² sensors must be heated to 665°F to work at all, and 950°F or better to work properly. The electric heaters bring them up to 1200°.

P1000 indicates that the OBD2 Inspection/Maintenance (I/M) system test are incomplete, or that one or more failed. Fuse #8 being blown would cause this as well.

Tip for future work, whenever working on engine control components (or pretty much anything electrical) step 1 is to disconnect the battery:



Quote:
Originally Posted by victorsmb View Post
Hello everyone, I currently have a 2002 Mustang GT and the only modification it has is a CAI, and before I installed that I already got the Service Engine Soon light on for some time, I used my BAMA Tuner to scan the car and I got all these codes:

P1000 OBD system readiness test not complete

P0443 Evaporative Emission System Purge Control Valve Circuit

P1451 Evaporative Emission System Vent Control Circuit

P0135 O2 Heater Circuit

P0141 O2 Heater Circuit

P0155 O2 Heater Circuit

P0161 O2 Heater Circuit

P1409 EGR vacuum regulator solenoid circuit (see p0403)

P1131 Lack of H02S21 switches sensor indicates lean (see p2197)

P1151 Lack of H02S21 switches sensor indicates lean (see p2197)

I was wondering if someone could help because I really don't know a lot about cars and would line to know how to fix it.

Thanks.
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SOLD! - 2003 GT, UPR X, FRPP 24lb/h, Magnaflow, PP 70mm TB & plenum, Delta Force tuned,
Steeda UDPs, Ralco flywheel, RAM HDX clutch, 3.73s, 262 rwHP/305 lb-ft.

New ride (7/1/2013) 1998 Mercedes SL500-5.0L 32V VVT 326/347 HP/tq
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Old 03-17-2013, 12:33 PM   #3
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Thank you very much for the response, I checked my fuse box to verify about that one that you mentioned and I realized I don't have that fuse (#8 20A), actually I don't know if this is normal, but some fuses look turned upside down, here's a picture of what I got:

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Old 03-17-2013, 12:42 PM   #4
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Actually I just noticed that #3 should not have a fuse (according to the user's manual) and that is precisely the fuse I do not have in #8, but it's broken, so I will go get a new one and I will let you know my findings.
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Old 03-17-2013, 12:51 PM   #5
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It doesn't matter which way the fuses are installed, but you should have a fuse #8:

from the 2002 Owner's Manual:


That someone obviously removed it is disturbing--replace it and see what happens. If it blows immediately or in a short while then there is something shorted or drawing too much current somewhere in the wiring or devices powered by that fuse...

---------- Post added at 01:51 PM ---------- Previous post was at 01:49 PM ----------

Quote:
Originally Posted by victorsmb View Post
Actually I just noticed that #3 should not have a fuse (according to the user's manual) and that is precisely the fuse I do not have in #8, but it's broken, so I will go get a new one and I will let you know my findings.
You are correct, I had not noticed that! Could be it was put there to store it, r someone was hunting for fuse 8 and got 3 in error?
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SOLD! - 2003 GT, UPR X, FRPP 24lb/h, Magnaflow, PP 70mm TB & plenum, Delta Force tuned,
Steeda UDPs, Ralco flywheel, RAM HDX clutch, 3.73s, 262 rwHP/305 lb-ft.

New ride (7/1/2013) 1998 Mercedes SL500-5.0L 32V VVT 326/347 HP/tq
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Old 03-17-2013, 12:52 PM   #6
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The car came with a custom alarm system, could this affect somehow?
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Old 03-17-2013, 12:54 PM   #7
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Quote:
Originally Posted by victorsmb View Post
Actually I just noticed that #3 should not have a fuse (according to the user's manual) and that is precisely the fuse I do not have in #8, but it's broken, so I will go get a new one and I will let you know my findings.
You are correct, I had not noticed that. Could be it was stored there, or that someone was attempting to replace #8 and got #3 in error--not the easiest place to get to, and in poor light who knows?

---------- Post added at 01:54 PM ---------- Previous post was at 01:53 PM ----------

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The car came with a custom alarm system, could this affect somehow?
It shouldn't, however there are too sorts of car alarm installers--very good and professional ones; and hacks. Not much in between and more of the latter than the former...
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SOLD! - 2003 GT, UPR X, FRPP 24lb/h, Magnaflow, PP 70mm TB & plenum, Delta Force tuned,
Steeda UDPs, Ralco flywheel, RAM HDX clutch, 3.73s, 262 rwHP/305 lb-ft.

New ride (7/1/2013) 1998 Mercedes SL500-5.0L 32V VVT 326/347 HP/tq
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Old 03-17-2013, 01:33 PM   #8
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Replaced the fuse but the Service Engine light is still on, I re scanned the car and the same codes popped up, so I guess that wasn't it :/

I was told that maybe this could be caused because my catalyzers and flowmasters (I don't know if they are called this way in english) are too old and fairly damaged, I was planning on removing catalyzers and changing the flowmasters for new ones... what do you think??
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Old 03-17-2013, 03:05 PM   #9
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Quote:
Originally Posted by victorsmb View Post
Replaced the fuse but the Service Engine light is still on, I re scanned the car and the same codes popped up, so I guess that wasn't it :/

I was told that maybe this could be caused because my catalyzers and flowmasters (I don't know if they are called this way in english) are too old and fairly damaged, I was planning on removing catalyzers and changing the flowmasters for new ones... what do you think??
Those are "permanent" codes, they need to be reset manually--your SCT tuner should let you reset the DTCs...
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SOLD! - 2003 GT, UPR X, FRPP 24lb/h, Magnaflow, PP 70mm TB & plenum, Delta Force tuned,
Steeda UDPs, Ralco flywheel, RAM HDX clutch, 3.73s, 262 rwHP/305 lb-ft.

New ride (7/1/2013) 1998 Mercedes SL500-5.0L 32V VVT 326/347 HP/tq
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Old 03-17-2013, 03:35 PM   #10
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Yeah. Clear the codes and take her for a drive and see what comes back. As for your exhaust, the flowmaster are the mufflers and as long as they aren't rusted out they are fine. As for the cats they can get clogged but this sounds like an electrical problem for sure. Definitely check that 8 fuse again.
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Old 03-19-2013, 01:38 AM   #11
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After replacing the fuse and not seeing any changes, I decided to disconnect the battery for about half an hour, then I reconnected it and the Service Engine light is gone and all the codes are also gone

So thank you everybody for your help!!

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Old 03-19-2013, 08:28 AM   #12
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Cool, you should see improved fuel economy with the O² sensor heaters and EGR working as they should...
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SOLD! - 2003 GT, UPR X, FRPP 24lb/h, Magnaflow, PP 70mm TB & plenum, Delta Force tuned,
Steeda UDPs, Ralco flywheel, RAM HDX clutch, 3.73s, 262 rwHP/305 lb-ft.

New ride (7/1/2013) 1998 Mercedes SL500-5.0L 32V VVT 326/347 HP/tq
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