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Land Rover Discovery 3 - V8 4.4 - Lambda Sensor issue? P0420
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aollaku
 


Member Since: 03 Feb 2022
Location: London
Posts: 10

United Kingdom 2007 Discovery 3 4.4 V8 SE Auto Adriatic BlueDiscovery 3
Land Rover Discovery 3 - V8 4.4 - Lambda Sensor issue? P0420

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Hello chaps,

Today my engine light came on. I`ve scanned the car with JLR IDS SDD and I found two error codes.

P0420 - Catalyst system efficiency below threshold (bank1)
P0174 - System too lean (bank 2).

Could this problem be caused by a bad MAF or is the time for new Lambda sensors?? If I need to change the Lambda what do you recommend me??

Best,

Andi
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Post #23746897th Aug 2024 2:37 am
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