Got Codes need help PO261, PO267, PO270, PO264, PO445, PO418, PO141 - VW Forum :: Volkswagen Forum
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Old 01-26-2011, 06:06 PM
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Default Got Codes need help PO261, PO267, PO270, PO264, PO445, PO418, PO141

So my 02 jetta 1.8 decided to throw one at me with the following codes:

P0141 02 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)

P0261 Cylinder I Injector Circuit Low

P0264 Cylinder 2 Injector Circuit Low

P0267 Cylinder 3 Injector Circuit Low

P0270 Cylinder 4 Injector Circuit Low

P0418 Secondary Air Injection System Relay "A" Circuit Malfunction

P0445 Evaporative Emission Control System Purge Control Valve Circuit Shorted

Not sure where to start with this one. Any help would be greatly appreciated.
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Old 01-27-2011, 09:29 AM
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Maybe a bad relay,bad ground or a fuse.
Check your battery volts is good >11.5volts.
Fuse 32 is for the injectors I think. Check it is good ,maybe see if there is voltage supplied to the fuse holder. Check all the fuses are good on top of the battery. Not sure what else to suggest right off the bat.
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Old 01-27-2011, 09:34 AM
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I'm assuming that 1 thing tripped all of those codes as they are all related. Unfortunatly I can't help you. Try the things that Ag mentioned and report back. If that does'nt help maybe by then someone else will have chimmed in.
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Old 01-27-2011, 09:39 AM
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Yeah, I was thinking some of them might be unrelated to each other. Maybe you've had some codes for a while that didn't trigger the CEL or something.
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Old 01-27-2011, 09:40 AM
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That's possible too.
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Old 03-08-2011, 06:31 PM
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Sorry for the delay, I've been out of town a lot and just now have been able to get under the hood of the Jetta. Checked the fuses first. When checking the fuse block on top of the battery I discovered a corner of it melted. It was the top left corner with the thick black wire. The fuse itself was in tacked but black and all crapped up. Iím thinking this could be the problem but why would this happen? Could the fuse block just get old and go haywire or is there some other issue lurking around. Anyway your help is greatly appreciated.
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Old 03-09-2011, 06:56 AM
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Quote:
Originally Posted by Cire1166 View Post
Sorry for the delay, I've been out of town a lot and just now have been able to get under the hood of the Jetta. Checked the fuses first. When checking the fuse block on top of the battery I discovered a corner of it melted. It was the top left corner with the thick black wire. The fuse itself was in tacked but black and all crapped up. Iím thinking this could be the problem but why would this happen? Could the fuse block just get old and go haywire or is there some other issue lurking around. Anyway your help is greatly appreciated.
This is quite common. You will probably want to change the fusebox I'm afraid. Also, the thick cable that attaches runs down to the supply from the alternator. The end with the crimp lug goes bad and develops a poor connection between the crimp and the cable. You get a volt drop across the bad connection and with time the cable at that end gets hotter and burns the cable up and keeps getting worse until its getting so hot it eventually melts the fuse box. I think they changed the design a little in 02 - you may have got the earlier variety I think.
The cable is part of a small harness from VW and it might be best to change the whole thing rather than just the thick alternator cable. If you are good with electrics and have a large enough crimp tool you could make up your own cable down to the alternator. You have to use some really beefy wire on that connection. I think that fuse is rated up around 100Amps or so , I'd have to look up the value to be sure. Needless to say, I don't think the fuse box or harness are cheap. Don't just change the fuse box without replacing the cable or it will just melt the fuse box again. It may be possible to cut back your existing cable insulation until you find nice shiny copper wire then cut the cable and reattach a new crimp at that point - but you'd need to check the resistance of the cable is less than 0.4 ohm or less I think.
I'd be more inclined to change the harness and fuse box and be done with it.
Make sure you get all the connections tight on the alternator and fuse box.
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Old 03-09-2011, 06:59 AM
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Fix the above first and it might boost up your volts from the alternator and possibly cure your original faults in the OP.
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Old 03-09-2011, 03:17 PM
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dont change the fuse box just wire the fuse out of the fuse box i had the same with my engine cooling fan on a ford xr2i and just wired the relay out of the fuse box and it worked sweet and with the codes i would clear them test drive the car after sorting that fuse out then plug on again after test drive hope that helps

The mig, bigger then big......!

also what is the idle speed as i had a passat throttle body go and it under idled and gave a charge output of 11.5v which is rubbish as 13.v is in range.
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Old 03-09-2011, 04:40 PM
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Might just be me but I don't think I like the idea of a cable and fuse capable of delivering 90 Amps + just lying around in the engine bay.
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Old 03-10-2011, 06:58 AM
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no obviously secure it in a case the one i had just clipped onto the side of the fuse box but that saves hours and cash as when you change the box its all fuses transfer pain depending on how big the fuse box is but good luck
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