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Has anyone seen this code? A forum and Google search didn't turn up anything related to the new Defender. It causes a solid amber check engine light. No apparent effect on the vehicle performance, at least with whatever is causing it on my P400. The generic fault is "Fuel Trim (Bank 1)", which apparently indicates that at some point the fuel trim has exceeded the expected limits. The service manual doesn't seem to list it as a DTC but, in other vehicles, it can be caused by a bad exhaust O₂ sensor or MAF sensor.
Some folks believe that Fault codes = specific problems. I work with telematics & fault codes and they are usually close enough for hand grenades. From there you have to do good old diagnostics. This should take you thru what to check and often (in other manufacturers) they list the probable causes & checks in order of likelihood. Good luck and keep us tuned what you find.
FWIW - The last TWO vehicles I had with similar codes thrown were fixed by changing the O2 sensor. And, fortunately, it was easy. No idea what it will / would be like on an L663.
Last edited by GrouseK9; Jan 26, 2022 at 12:30 PM.
Some folks believe that Fault codes = specific problems. I work with telematics & fault codes and they are usually close enough for hand grenades. From there you have to do good old diagnostics. This should take you thru what to check and often (in other manufacturers) they list the probable causes & checks in order of likelihood. Good luck and keep us tuned what you find.
FWIW - The last TWO vehicles I had with similar codes thrown were fixed by changing the O2 sensor. And, fortunately, it was easy. No idea what it will / would be like on an L663.
Thanks. Where did you find the DTC entry that you posted? That code isn't in the P400 service manual. I'm planning to pay a visit to the dealer tomorrow and see what they say.
I paid a stupid amount for an annual subscription in Topix. After I was in, I was peeved at how much info comes up that I still don't have access to. I did a search on all the materials and that came up on: "WSM-46341 - Workshop manual Defender (LE) 2022". What I would have thought was commonly referred to as the "service manual". That code and others are referenced in "Section 1 - General Information, 100 - Service Information, 100-00 General Information, Description and Operations, Diagnostic Trouble Code Index". And thank GOD for document search...
Last edited by GrouseK9; Jan 26, 2022 at 04:54 PM.
I paid a stupid amount for an annual subscription in Topix. After I was in, I was peeved at how much info comes up that I still don't have access to. I did a search on all the materials and that came up on: "WSM-46341 - Workshop manual Defender (LE) 2022". What I would have thought was commonly referred to as the "service manual". That code and others are referenced in "Section 1 - General Information, 100 - Service Information, 100-00 General Information, Description and Operations, Diagnostic Trouble Code Index". And thank GOD for document search...
Diagnostic code P0170
