P0171 Diagnostic Trouble Code Discussion for February 2020
Fuel System Lean (Bank 1)
Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.Trouble Ticket Help Requests for DTC P0171
| Help Request | Posted | |
| 2010 Audi A6 Quattro Avant 3.0L MIL Lamp on VIN: WAU4GAFBXA P0171: lean bank 1. Car shows P0171 lean mixture bank one. Also p0456, small evap leak. Data stream shows trim numbers short term and long term around 6 to 8% at idle. If the RPM is raised to about 1500 or higher even without any load on the engine the long term trim numbers ... |
February 17, 2020 | |
| 2014 Cadillac ATS Performance 2.0L MIL Lamp on VIN: 1G6AJ5SX5E P0171: bank 1 lean. car came in with p0171 bank 1 lean found two bulletins first bulletin was to check intake bolt for being loose so i went ahead and smoked the intake system. no leaks found.second bulletin was to check the vac. system for the engine mounts checked withe a v... |
February 26, 2020 | |
| 2014 Cadillac ATS Performance 2.0L MIL Lamp on VIN: 1G6AJ5SX5E P0171: bank 1 lean. car came in with p0171 bank 1 lean found two bulletins first bulletin was to check intake bolt for being loose so i went ahead and smoked the intake system. no leaks found.second bulletin was to check the vac. system for the engine mounts checked withe a v... |
February 27, 2020 | |
| 2013 Volvo XC60 T6 3.0L Excessive Emissions VIN: YV4902DZ0D P0171: Bank 1 System Lean. Engine is only lean at idle, so I suspect vacuum leak. Originally when I pulled engine oil dipstick out vacuum could be heard hissing and could suck my finger down. Pulling oil cap off, a very loud hiss is heard. Also the small hole in the diaphragm cover ... |
February 27, 2020 |
