| 1.6L ENGINE – ILLUMINATED MALFUNCTION INDICATOR LAMP (MIL) – DTC P0420 |
FORD : | 2011-2013 Fiesta |
2011-2013 Fiesta vehicles equipped with a 1.6L engine may exhibit an illuminated MIL with diagnostic trouble code (DTC) P0420.
SERVICE PROCEDURE
- Using Integrated Diagnostic System (IDS) tool or equivalent Scan Tool, check the catalyst monitor bank 1 oxygen storage capacity reading. When using the IDS to obtain mode 6 data. Select the following:
- Toolbox
- Powertrain
- OBD Test Modes
- Mode 6 On-Board Test Results
- Locate catalyst monitor bank 1 oxygen storage capacity value
- Is the catalyst monitor bank 1 oxygen storage capacity value 205 or lower?
- Yes – proceed to Step 4.
- No – proceed to Steps 3.
- Replace the catalytic converter.
- Reprogram the powertrain control module (PCM) to the latest calibration using IDS or Ford J2534 release 95.05 or higher. Make sure you are connected to the internet when entering module programming to obtain the latest updates. Calibration files may also be obtained at www.motorcraftservice.com.
NOTE: If the transmission control module (TCM) calibration required an update when the PCM calibration was updated, perform the clutch adaptive learning procedure. Using IDS service tool or equivalent Scan Tool, select Powertrain, Transmission, Transmission Adaptive Learning and perform the Clutch Adaptive Learning.
AE8Z-5G232-A
Ford Exhaust MANIFOL
Last update on 2026-06-10 / Affiliate links / Images from Amazon Product Advertising API | Catalytic Converter |
2S6Z-9450-A
Ford Gasket
Last update on 2026-06-18 / Affiliate links / Images from Amazon Product Advertising API | Gasket – Flexible Pipe |
| W703662-S403 | Nut – Flexible Pipe (4 Req) |
| W500634-S442 | Bolt – Exhaust Manifold |
| W703662-S403 | Nuts – Exhaust Manifold (4 Req) |
| BE8Z-9448-D
Ford Gasket
Last update on 2026-06-10 / Affiliate links / Images from Amazon Product Advertising API | Gasket – Exhaust Manifold |
| W520103-S403 | Nuts – Flexible Pipe (2 Req) |
XL-2
Genuine Ford Accessories (XL-2) High Temperature Nickel Anti-Seize Lubricant - 8 oz.
Last update on 2026-06-10 / Affiliate links / Images from Amazon Product Advertising API | Motorcraft High Temperature Nickel Anti-Seize Lubricant |
W715135-S440
Ford W715-135S440, Suspension Stabilizer Bar Link Nut
Last update on 2026-06-18 / Affiliate links / Images from Amazon Product Advertising API | Nut – Stabilizer Bar Link Upper |
| W713640-S437 | Nut – Wheel Hub |
| W709618-S442 | Bolt – Ball Joint |
W520203-S442
Ford W520203-S442 - Nut Hex
Last update on 2026-06-18 / Affiliate links / Images from Amazon Product Advertising API | Nut – Ball joint |
| W520102-S442 | Nut – Bearing Retainer Strap (2 Req) |
| YS4Z-3N324-AA | Strap – Bearing Retainer |
Service Information & Reprogramming
Software necessary to program electronic modules to the latest calibration level, perform module initialization (PATS), and set Programmable Parameters on Ford, Lincoln and Mercury vehicles.
Ford Module Programming (FMP) is a software application that allows subscribers to program electronic modules on Ford, Lincoln and Mercury vehicles. It can be used for:
- Reprogramming emission-related (OBDII) modules on some vehicles manufactured in 1995 and all vehicles manufactured from 1996 to the present
- Reprogramming or reconfiguring non-emission-related modules on many vehicles (UBP and MS-CAN not supported)
In addition, module initialization (PATS) functions such as Keycode Erase/Reprogram and PCM Parameter Reset can be done using this application.
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Last update on 2026-06-10 / Affiliate links / Images from Amazon Product Advertising API
- ALL OF THE J2534 PROTOCOLS - This single unit has all of the protocols you need for your OEM J2534 reprogramming and diagnostics including the latest in DoIP and CanFD
- J2534 TECHNICAL SUPPORT - FREE for the life of the tool. Staffed by technicians who understand vehicle repair and J2534 Pass‑thru
- TOOLBOX WITH OEM APPLICATION DESCRIPTIONS - educational video tutorials and real-time news – Giving you the confidence and up-to-date knowledge to get the job done
- J2534 v05.00 API - The newest version of J2534 to give you the latest in pass-thru technology
- FUTURE PROOF WITH 4 CAN CHANNELS - Going beyond the 3 required by select Chrysler/FCA models, CarDAQ-Plus 3 also provides a 4th to meet the needs of future OEM applications
Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API
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using Ford Module Programming (FMP) can Reprogram and Configure most Modules.Latest Calibration Information
Module Build Data (As-Built)
Use VIN to obtain As-Built data
www.motorcraftservice.com
Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API
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- Delivers serious jump-starting power with 1000 peak amps and 500 instant starting amps
- Reverse polarity alarm alerts when there is an improper connection; Connect the clamps to the battery, turn on the switch and start your vehicle. All Metal Powder Coated Clamps
- Features a 120 PSI air compressor to help inflate tires with low pressure; High-powered LED light rotates 270 degrees to help you work in the dark
- Built-in 12V DC outlet and USB port provide portable power for electronic devices; Includes a limited 1 year manufacturer warranty
- Jump starter should be charged every 30 days when not in use; Charges using a standard household extension cord (sold separately)
Last update on 2026-06-10 / Affiliate links / Images from Amazon Product Advertising API
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