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2007 Ford Navigator P1719 Check Engine Light: MAF Sensor Replacement and Diagnosis

Model: 2007 Navigator Fault Code: P1719 Posted: 2016-11-08 16:14

My 2007 Ford Navigator with a 5.4L V8 engine and 4WD is showing a check engine light with fault code P1719, indicating an overdrive drum speed sensor issue. I replaced the mass air flow (MAF) sensor after receiving diagnostic codes from Auto Zone, which included P0171, P0174, and P1719. After reinstallation—using the same orientation as the original with the lock clip on the bottom—I disconnected the negative battery terminal for approximately 15 minutes to clear the fault codes. The vehicle has driven over 30 miles without any recurrence of the check engine light. A recent scan confirmed that P1719 remains present, though no drivability issues have been observed. I also replaced the air filter and verified it was not oiled. While the MAF sensor replacement helped resolve related P017x codes, I now suspect that P1719 may be a management or 'computer logic' issue rather than a direct sensor failure, especially since no other drivability-related errors are present.

Related fault codes

P1719

Comments (10)

Anonymous 2016-11-08 16:24

What is the exact fault code you're seeing? Why was the MAF sensor replaced—was any diagnostic testing performed? Which engine and model year of your 2007 Navigator? Any additional details on symptoms or driving conditions?

Anonymous 2016-11-09 09:19

I replaced the MAF sensor because it appeared in the initial diagnosis from Auto Zone. The codes listed were P0171, P0174, and P1719. My vehicle is a 2007 Navigator with a 5.4L engine and 4WD. After the replacement, the drive quality improved significantly. I've driven over 30 miles without any check engine light reactivation. A recent scan shows the code remains as P1719—overdrive drum speed sensor.

Anonymous 2016-11-09 10:25

P1719 is present—have you checked for any other codes, such as P017x, before addressing this? Are those codes active or pending? Are you using an oiled air filter?

Anonymous 2016-11-09 12:16

I resolved the MAF-related code while fixing a bank one oxygen sensor issue. I replaced the air filter and confirmed it was not oiled. After driving approximately 50 miles, no error codes have reappeared.

Anonymous 2016-11-09 12:28

Don't be overly concerned about P1719—since there are no drivability-related codes, this issue may resolve itself soon. P1719 is not typically a sensor fault; it's more likely related to engine management logic and often correlates with P017x codes.

Anonymous 2016-11-09 13:12

Thank you for your detailed response—it has helped me understand the current status. I'm now confident in the direction of my repair process and plan to replace all oxygen sensors at a later date.

Anonymous 2016-11-09 13:33

STOP—do not continue replacing parts blindly. A fault code does not mean a part is defective. Auto parts retailers often claim 'code = bad part' for sales purposes. You're essentially blaming the system that reports the issue. If oxygen sensors are functioning, they are providing valid data and reporting accurately.

Anonymous 2016-11-09 14:21

Thanks for the clarification—I appreciate your insight.

Anonymous 2018-06-08 05:58

Hey Kev2, I'm experiencing the same issue as charreobd. My 2008 Navigator is showing P171, P174, and P179. The vehicle feels like it's low on transmission fluid—no 'get-up-and-go' when accelerating from a stop, sometimes gets stuck in first gear and requires sitting before shifting normally. However, these issues are intermittent and resolve on their own. This doesn't seem like a failing transmission (which would worsen over time). I fully agree with your point about 'shooting the messenger.' But—what should I do if replacing parts isn’t the solution? Are there any known software or calibration fixes for this code?

Anonymous 2019-06-26 13:30

I was wondering if you ever found a resolution to this issue? My 2007 Navigator is exhibiting exactly the same symptoms—any updates on what might be causing P1719 or related codes?