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#1
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2002 4.6is - A few codes day 2 on the road
Codes: 4 Lambda Sensor Heater Post Cat Bank 2 20 Lambda Probe 2 rear cat 23 Lambda sensor ageing h cat bank 2 (Are 4,20,23 the same sensor) 189 DMTL Module - Pretty sure the pump is bad, 2nd time it’s thrown this code. (reset yesterday) 26 LR-Adaptation multiple Area 1 27 LR-Adaptation multiple (Bank 2) No idea what 26 & 27 are..? Filled with Shell 93 & Seafoam. Sent from my iPhone using Tapatalk
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740iLDUKE 01' DINAN 7 S62 Swap - Stratus Grau (1587 produced in SG 440) 02' 4.6is DINAN X5 S2 Supercharged 833/3258 produced | 1/27 Dinan X5's |
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#2
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Cleared codes 2 days ago. Drove a few cycles, light cut on again last night.
4/11/19 Codes 20- Lambda probe 2 rear cat 4 - 02 sensor heater rear kat bank 2 81 - secondary air system bank 2 27 - LR adaptation area1 bank 2 23 - Lambda sensor ageing hcat bank 2 Where should I start?
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740iLDUKE 01' DINAN 7 S62 Swap - Stratus Grau (1587 produced in SG 440) 02' 4.6is DINAN X5 S2 Supercharged 833/3258 produced | 1/27 Dinan X5's |
#3
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I would start with the air pump. And oxygen sensors.
Does the 4.6 have the valvetronic, that might be 27?
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2006 4.8is, Black on White. SOLD Sniff Sniff. 2017 F85 x5m, Black on Red. BEAST MODE "The older we grow the greater becomes our wonder at how much ignorance one can contain without bursting one's clothes." - Mark Twain Unlock OBC post 5 |
#4
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Quote:
Valvetronic began on the N62 thankfully. Ill dig into the sensors. Thanks!! Some history - it sat for about 10 months. Supercharger had oil blow-by that was remedied with a rebuild. Runs great off and on. Seafoam in the gas tank and tonight I soaked the throttle body/intake in spray seafoam and got a load of smoke out of driver side bank exhaust. Wondering if some of this is from the oil being misted through the throttle body.
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740iLDUKE 01' DINAN 7 S62 Swap - Stratus Grau (1587 produced in SG 440) 02' 4.6is DINAN X5 S2 Supercharged 833/3258 produced | 1/27 Dinan X5's |
#5
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Some of the plastic hoses get pretty crispy at this age.
I'd try a smoke test if you can get at a unit. I found a video on the Bavauto site that may still be around that showed the replacement of the vacuum pump and where those hoses are. My similar problem was solved by changing a $40 hose. |
#6
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If you were burning oil it could have deff destroyed your o2, and cats.
Isn’t the m62 secondairy air pump only for getting up to operating temp, then it shuts off? I haven’t messed with an m62 in a long time now. I forget. Anyway if it isn’t necessary for when engine is at operating temp, then then that means your first 02 is monitoring it. Found it. Yea if you feel the SAP is kicking in, and working, then go with the first 02. Probably shot from oil cookage. https://bimmertips.com/what-does-the...y-air-pump-do/
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2006 4.8is, Black on White. SOLD Sniff Sniff. 2017 F85 x5m, Black on Red. BEAST MODE "The older we grow the greater becomes our wonder at how much ignorance one can contain without bursting one's clothes." - Mark Twain Unlock OBC post 5 |
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