Technical Service Bulletin


Some 2019-2020 Ford Ranger vehicles may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P0420 stored in the powertrain control module (PCM). This may be due to various software parameters within the PCM. To correct the condition, follow the Service Procedure to
reprogram the PCM and replace the catalytic converter.


Follow the Service Procedure steps to correct the condition if the vehicle meets all of the following


2019-2020 Ford Ranger

Exhibits an illuminated MIL with DTC P0420

NOTE: Part quantity refers to the number of that service part number required, which may be different than the number of individual pieces. Service part numbers contain 1 piece unless otherwise stated. “As Needed” indicates the part is required but the number may vary or is not a whole number; parts can be billed out as non-whole numbers, including less than 1.


  • (1) KB3Z-5E212-A – Catalytic Converter Assembly
  • (1) W714265-S442 – Catalytic Converter To Turbo Nuts
  • (1) W719427-S439 – Stabilizer Bar Bracket Bolt
  • (2) W716936-S442 – Stabilizer Bar Bracket Nut

Warranty Status:

Eligible under provisions of New Vehicle Limited Warranty (NVLW)/Emissions Warranty/Service Part Warranty (SPW)/Special Service Part (SSP)/Extended Service Plan (ESP) coverage. Limits/policies/prior approvals are not altered by a TSB. NVLW/Emissions Warranty/SPW/SSP/ESP coverage limits are determined by the identified causal part and verified using the OASIS part coverage tool.

Labor Times:

2019-2020 Ranger: Retrieve DTCs, Replace The Catalytic Converter And Reprogram The PCM (Do Not Use With Any Other Labor Operations) / Operation 212021A / 1.6 Hours

Repair/Claim Coding:

Causal Part: 5E212 / Condition Code: 04

Service Procedure:

1. Replace the catalytic converter. Refer to Workshop Manual (WSM), Section 309-00.

2. Reprogram the PCM using the latest software level of the appropriate Ford diagnostic scan tool.

NOTE: Advise the customer this vehicle is equipped with an adaptive transmission shift strategy which allows the vehicle’s computer to learn the transmission’s unique parameters and improve shift quality. When the adaptive strategy is reset, the computer will begin a relearning process. This relearning process may result in firmer than normal upshifts and downshifts for several days.

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