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Topic: DTC P0158 (Read 2859 times) |
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Tenfut
Full Member
White Cosworth Saloon
Posts: 621
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Anyone know if this code influences emissions, MOT due in 10 days
TIA
Tony
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Tompion
Administrator
1997 2.3 Ultima estate.
Posts: 2918
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Re: DTC P0158
« Reply #1 on: Mar 9th, 2013, 6:27pm » |
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P0158 Downstream Heated Oxygen Sensor circuit Voltage High - Bank No. 2.
Downstream sensors are said not to influence emissions.
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ABS multiplug wheel sensor pins MK IV or MK 20
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Tenfut
Full Member
White Cosworth Saloon
Posts: 621
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Re: DTC P0158
« Reply #2 on: Mar 11th, 2013, 7:57pm » |
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Thanks Tompion for your input
That is the only code coming up so I suppose its a case of leave well alone and wait and see.
Fingers crossed
Tony
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amigafan2003
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I'm a YaBB newbie!
Posts: 972
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Re: DTC P0158
« Reply #3 on: Mar 11th, 2013, 8:16pm » |
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Downstream sensors are there to monitor the condition of the cats, so in theory you could have a broken cat and not know about it.
broken cats can affect emissions.
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Tenfut
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White Cosworth Saloon
Posts: 621
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Re: DTC P0158
« Reply #4 on: Mar 11th, 2013, 10:20pm » |
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I had a feeling that might be the case.
My scanner is a U380 not sure of the brand and that was the only code that showed. I cleared if then went for a 20 mile blast down the motorway and the code didn't come back. Does that tell me anything?
How would I know which (if either) cat is not working.
I will have to chance the MOT now as I wont have time to change a cat.
Tony
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Tenfut
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White Cosworth Saloon
Posts: 621
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Re: DTC P0158
« Reply #6 on: Mar 12th, 2013, 9:40am » |
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So passenger side then
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Glyn
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Now an OAP ! 95 cossie and another !and a 12v
Posts: 584
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Re: DTC P0158
« Reply #7 on: Mar 17th, 2013, 10:15pm » |
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Tony
Does your U380 read ABS as well?
Glyn
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lesterlad aka Rodders
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2.3 Ghia x Estate (Manual)
Posts: 877
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Re: DTC P0158
« Reply #8 on: Mar 17th, 2013, 11:56pm » |
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I have a U380 and unfortunately it doesn't read ABS
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Glyn
Full Member
Now an OAP ! 95 cossie and another !and a 12v
Posts: 584
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Re: DTC P0158
« Reply #9 on: Mar 21st, 2013, 1:54am » |
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Thanks for that. Do any of these scanners in the lower price range read ABS ? Anyone know ?
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Simmo
Administrator
I'm an OAP !
Posts: 5508
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Re: DTC P0158
« Reply #10 on: Mar 21st, 2013, 7:11am » |
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on Mar 21st, 2013, 1:54am, Glyn wrote:| Thanks for that. Do any of these scanners in the lower price range read ABS ? Anyone know ? |
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Glyn as far as I know they do not. 
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ADroste
Full Member
S-Type 2.7D SE 2008 replaced Scorpio 2.3 Ult.1998
Posts: 598
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Re: DTC P0158
« Reply #11 on: Mar 21st, 2013, 6:40pm » |
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on Mar 11th, 2013, 10:20pm, Tenfut wrote:| ... I cleared if then went for a 20 mile blast down the motorway and the code didn't come back. Does that tell me anything?... |
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I don't think so. If I remember well, after clearing such an emssion related code, which in newer cars should trigger the motor control indicator, you need to complete ten full OBD cycles, before it reoccures. One OBD-cycle starts with cold engine and ends with a warm engine after exceeding a certain speed value and control unit has reached closed loop condition.
I played that game recently with a KA of 2004. Motor control indicator showed up and MOT failed although emission were below limits. After two weeks and having cleared the code directly before I drove to MOT station KA passed MOT without problems. Emissions again were well below limits. After nine times travel to work, indicator came up again.
This shows me that there is a mismatch in the specification of (downstream) Lambda probes and the efficiency of catalytic converters. In my case the probe warns too early. I think such tolerance problems are well known to every engineer. I assume to prevent expensive legal quarrels in US and high pollution penalties, car manufactures choose the safe side.
Regards
Armin
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Glyn
Full Member
Now an OAP ! 95 cossie and another !and a 12v
Posts: 584
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Re: DTC P0158
« Reply #12 on: Mar 22nd, 2013, 1:18am » |
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Thanks Simmo. Shame.
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