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 Posted: Mon Sep 19, 2011 1:14 pm |
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Joined: Sep 03, 2010
Posts: 979
Trade Rating: +6
Location: Biggleswade
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I'm a tad pi***d off at the minute, p0141 and p0139 came up when I had car scanned, replaced the o2 sensor 2 after the cat and had the ecu cleared, went for a drive and after 10miles the Eng light came back on, rescanned it and the same faults came up, is sensor 2 deffently the one after the cat?
Thanks Dan
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Posted: Mon Sep 19, 2011 1:16 pm |
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Joined: Feb 07, 2010
Posts: 2949
Trade Rating: +6
Location: Athens, Greece
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Yep. It is.
Could it be the cat is dead?
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| 1.4i, 2001, 3-door, China Blue
Repair safely - Drive safely | |
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Posted: Mon Sep 19, 2011 1:20 pm |
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Joined: Sep 03, 2010
Posts: 979
Trade Rating: +6
Location: Biggleswade
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Thanks, is there any way of telling if the cat is kaput, would the cat have a fault code?
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Posted: Mon Sep 19, 2011 1:25 pm |
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Joined: Sep 03, 2010
Posts: 979
Trade Rating: +6
Location: Biggleswade
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I didn't use a Bosch one as I couldnt get hold of one, tried a few places but there was a long order time, no chance it could be that is it,
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Posted: Mon Sep 19, 2011 1:48 pm |
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Joined: Nov 27, 2010
Posts: 11520
Trade Rating: +10
Location: What's it to you? ? ?
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| Dan- wrote: |
| Thanks, is there any way of telling if the cat is kaput, would the cat have a fault code? |
Exhaust emmisions test.
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Posted: Mon Sep 19, 2011 1:58 pm |
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Joined: Feb 07, 2010
Posts: 2949
Trade Rating: +6
Location: Athens, Greece
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P0141 = O2 sensor heater circuit Bank 1 sensor 2
P0139 = O2 sensor circuit slow responce Bank 1 sensor 2
Hmm..
Checked the wiring is OK?
Could be a contacts issue on the ECU connector if the cat is fine.
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| 1.4i, 2001, 3-door, China Blue
Repair safely - Drive safely | |
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Posted: Mon Sep 19, 2011 2:37 pm |
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Joined: Sep 03, 2010
Posts: 979
Trade Rating: +6
Location: Biggleswade
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Just been and checked the wiring seems fine, if it helps I only had the EMG man light probably since I had the flywheel and clutch replaced
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Posted: Mon Sep 19, 2011 3:12 pm |
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Joined: Aug 01, 2011
Posts: 390
Trade Rating: 0
Location: Bath UK
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Check for 12v across the two heater wires (that'll be the two same coloured wires) at the O2 sensor connector. Without the additional heating then the O2 sensor will cool off produce a slow signal response at certain low temp exhaust conditions like when ticking over
With ignition off check for very low resistance of just a few ohms across the sensor heater circuit just to make sure the heater is intact and hasn't been damaged on installation
If you have very low resistance and 12v supply and earth then you have a functioning heater
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Posted: Mon Sep 19, 2011 3:47 pm |
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Joined: Feb 07, 2010
Posts: 2949
Trade Rating: +6
Location: Athens, Greece
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| Dan- wrote: |
| Just been and checked the wiring seems fine, if it helps I only had the EMG man light probably since I had the flywheel and clutch replaced |
That was quick. Did you check the ECU conectors?
| Deckchair5 wrote: |
Check for 12v across the two heater wires (that'll be the two same coloured wires) at the O2 sensor connector. Without the additional heating then the O2 sensor will cool off produce a slow signal response at certain low temp exhaust conditions like when ticking over
With ignition off check for very low resistance of just a few ohms across the sensor heater circuit just to make sure the heater is intact and hasn't been damaged on installation
If you have very low resistance and 12v supply and earth then you have a functioning heater |
+1
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| 1.4i, 2001, 3-door, China Blue
Repair safely - Drive safely | |
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Posted: Tue Sep 20, 2011 11:51 am |
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Joined: Sep 03, 2010
Posts: 979
Trade Rating: +6
Location: Biggleswade
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Posted: Wed Sep 21, 2011 12:31 am |
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Joined: Aug 01, 2011
Posts: 390
Trade Rating: 0
Location: Bath UK
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Yes, as stated above you must have 12v and earth to the sensor heater circuit for it to work
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Posted: Wed Sep 21, 2011 3:38 am |
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Joined: Feb 07, 2010
Posts: 2949
Trade Rating: +6
Location: Athens, Greece
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As your old λ-sensor is probably OK, it might be worth donating it to some other info member
who might be after one.
'Just a green thought.
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| 1.4i, 2001, 3-door, China Blue
Repair safely - Drive safely | |
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Posted: Wed Sep 21, 2011 8:15 am |
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Joined: Sep 03, 2010
Posts: 979
Trade Rating: +6
Location: Biggleswade
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Thanks guys, just one more question/ advise how would any of you go about reconecting the wire as there is very limited acsess can only just get one hand to the wire, i wont be able to get my wire stripper down there deffo not my crimps to get bullets on, ive got some crimping blocks but there normaly used to spur another wire,
many thanks Dan
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Posted: Wed Sep 21, 2011 8:47 am |
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Joined: Nov 27, 2010
Posts: 11520
Trade Rating: +10
Location: What's it to you? ? ?
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Needs to be solder & heatshrink for a proper repair.
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