Odes P1719 n P0171

GRANNYCA

MEMBER
2007 LINCOLN NAVIGATOR
143,000 MILES

While driving n truck gets ready to shift into next gear u feel bad hesitation n wrench light comes on. Truck will not shift normally. They OBD reader shows codes P1719 n P0171. Mechanic states vehicle getting too much air not enough gas. It's a sensor but Where do I start looking for this sensor?

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
47,643 POSTS

Hey GRANNYCA,

P0171 System Too Lean (Bank 1) The PO1719 deals with a transmission issue. (Engine torque Signal)

I would recommend start by checking for vacuum leaks, check the O2 sensors (bank1) and see if you can find any issues.

Here are a couple of guide that will help you

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

and

https://www.2carpros.com/articles/repair-lean-mixture-codes-p0171-or-p0174-on-some-manufacturers

as for the transmission problem do a service and then clear the codes here are a couple more guides that should help.

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

and

https://www.2carpros.com/articles/check-engine-light-clear-codes

Please let us know happens so it will help others.

Best, Ken

Odes P1719 n P0171

1 Reply

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