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 |
