Hello Wimateeka
Welcome to 2carpros
The code (p0171) means the oxygen sensor
in bank 1 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, bank 1 is the side of the engine that has cylinder #1. P0174 is similar to p0171.
What you need to do is to take The MAF sensor off and spray it with electronics cleaner or brake cleaner
. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling.
Inspect all vacuum and PCV hoses, replace if necessary. And finally check for a dirty fuel filter and proper fuel pressure.
P1405 - DPF EGR Sensor
Upstream Hose Off or plugged.
Look for signs of water or icing in hose
Verify hose connection and routing (no excessive dips)
Friday, October 9th, 2020 AT 11:03 AM
(Merged)