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I had the SES light come on and had a Malfunctioning O2 Bank 1 Sensor 1, and a Bank 1 lean. So I replaced all 4 O2s, they had 92k on them, and guess what? Same codes again. I am thinking a Vac leak somewhere.
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Donny
2003 Discovery, CDL,Front Drive shaft, 245/75/16 Definity Mud Tires, Optima Red Top Battery. Vice President Georgia Bounty Runners. 95% done with the Major High Mileage Service.
Try clearing them again and see if they come back, it does sometimes happen.
If it does come back check for exhaust leaks, a Seafoam treatment is a great way to find even the little ones.
If no exhaust leak it's either the valley gasket or a slight possibility of injector o-ring. The lower inlet manifold bolts have been known to loosen over time and often just a re-torque will solve the issue. A can of carb cleaner can be a great tool for finding vac leaks.
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'03 D2
Super Pro Bushes; Was Koni HT, now HT RAID; Detroit Rear & TT Front; CDL then Quife torque biasing center diff; Style A Wheels; Scorpion ATRs; Goodridge Stainless Lines; EBC YellowStuff on DBA 4000XS; Big Valve Heads; 202 Cam; Stroked to 4.8L; Tuned Motronic; Added ACE & SLS; Euro Headlamps W/ Leveling & Powerfold Mirrors. Forced induction coming next.
Give us the exact fault code numbers so we know what failed with the 02's.
Have you cleaned all 4 connections, grease or oil will cause them to throw codes.
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Mike
Retired service manager. Member of the Solihull Society, NCLR club, SCLR and Santa Barbara 4 Wheelers.
99 D2, 3" lift, CDL with a Detroit and T.T. lockers, H.D. axles, 4:11 gears, Custom front and rear bumpers, sliders, Warn winch, and 5 HID's.
Need Parts? paulgrant@mac.com, or 203-770-1699 willtillery@roverguy.com, or 434-251-9331
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PM Marty(Drillbit)[url]http://www.landroversonly.com/forums...o=newpm&u=5940
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Yeah, cleaned them up, and the codes were: P130 and P171. Found a slight Exhaust leak at the Manifold flange on the drivers side. Could that be the problem?
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Donny
2003 Discovery, CDL,Front Drive shaft, 245/75/16 Definity Mud Tires, Optima Red Top Battery. Vice President Georgia Bounty Runners. 95% done with the Major High Mileage Service.
Definitely and bank 1 is the LH so looks like you found the issue!! Those always leak for some reason. The good news is that it's a cheap and quick fix.... assuming you don't twist off a stud, so be careful with that.
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'03 D2
Super Pro Bushes; Was Koni HT, now HT RAID; Detroit Rear & TT Front; CDL then Quife torque biasing center diff; Style A Wheels; Scorpion ATRs; Goodridge Stainless Lines; EBC YellowStuff on DBA 4000XS; Big Valve Heads; 202 Cam; Stroked to 4.8L; Tuned Motronic; Added ACE & SLS; Euro Headlamps W/ Leveling & Powerfold Mirrors. Forced induction coming next.
2003 Discovery, CDL,Front Drive shaft, 245/75/16 Definity Mud Tires, Optima Red Top Battery. Vice President Georgia Bounty Runners. 95% done with the Major High Mileage Service.
SES Light
