Faulty Fiesta Fuse

Dec. 11, 2017
Some 2011 Ford Fiesta vehicles may exhibit a MIL on with DTC U029F set in the PCM, and/or a no-crank condition with no communication with the PCM.

Some 2011 Ford Fiesta vehicles may exhibit a MIL on with DTC U029F set in the PCM, and/or a no-crank condition with no communication with the PCM.

1. Disconnect the battery.
2. Inspect fuse F27 in the battery junction box for a possible open condition. Replace the fuse as required.
3. Remove the rear seat cushion.
4. Determine the vehicle build date. Is the date on or before 3/29/2011?

a. Yes….Install the in-line fuse included with the Natural Vacuum Leak Detection (NVLD) service kit.
b. No….Inspect the in-line NVLD fuse. If the fuse is open, replace the 1A fuse and install a new NVLD service kit. If the fuse is closed, install the rear seat cushion and connect the battery. Refer to Powertrain Control/Emissions Diagnosis manual, pinpoint test HZ for normal diagnostics.

5. Install the rear seat cushion.
6. Connect the battery.

P/N                                 PART
AE8Z-9J279-L

NVLD Module and Hose assembly (4-door)

AE8Z-9J279-M NVLD Module and Hose assembly (5-door)
9L3Z-14526-BA BJB Fuse
BE8Z-14526-AA 1A Fuse

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