P219A · Manufacturer communications

RAM · 2026-07-29

Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle exhibit/set SYMPTOM: one or more of the following Diagnostic Trouble Codes (DTCs): ● P219A - Bank 1 Air-Fuel Ratio Imbalance. ● P219B - Bank 2 Air-fuel Ratio Imbalance. ● P032F - Combustion Engine Producing Insufficient Torque. NOTE: This revision has an updated and more effective fix for DTC P219B than the prior version. Customers may experience one or more of the following: ● **Power Take Off (PTO) may cancel during engagement with high PTO loads.** ● Engine speed surging, unstable, hunting, or oscillating while coasting at low vehicle speeds. ● Stationary Idle PTO feature is not activating when the user configuration is selected to require parking…

RAM · 2026-06-24

Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P219A - Bank 1 Air-Fuel Ratio Imbalance Bank 1. ● P219B - Bank 2 Air-fuel Ratio Imbalance. NOTE: This revision has an updated and more effective fix for DTC P219B than the prior version. Customers may also comment on one or more of the following: ● **Power Take-Off (PTO) may cancel during engagement with high PTO loads.** ● PTO not auto-resuming after hard-wired remote start (DD/DP Only). ● Engine speed surging, unstable, or oscillating while coasting at low vehicle speeds. ● Stationary Idle PTO feature is not activating when the user configuration is selected to require…

RAM · 2026-05-05

Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may exhibit/set the following Diagnostic Trouble Code (DTC): ● P219A - Bank 1 Air-Fuel Ratio Imbalance Bank 1. Customers may also comment on the following: ● **Potential under run or stall when the vehicle utilizes the Trailer Reverse Steering Control feature and is connected to a trailer attempting to backup.** This bulletin involves reprogramming the PCM with the latest available software.

RAM · 2026-03-10

Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle exhibit/set **one or more of the following Diagnostic Trouble Codes (DTCs)**: ● **P219A - Bank 1 Air-Fuel Ratio Imbalance. ● P219B - Bank 2 Air-fuel Ratio Imbalance.** ● P032F - Combustion Engine Producing Insufficient Torque. Customers may experience one or more of the following: ● **Engine speed surging, unstable, hunting, or oscillating while coasting at low vehicle speeds. ● Stationary Idle Power Take off (PTO) feature is not activating when the user configuration is selected to require parking brake be set (DD/DP Only). ● PTO not auto-resuming after hard-wired remote start (DD/DP Only).** ● Driveline clunk or bump when coasting to a stop **in cruise…

RAM · 2026-03-10

Technical Service Bulletin (TSB) Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle exhibit/set **one or more of the following Diagnostic Trouble Codes (DTCs)**: ● **P219A - Bank 1 Air-Fuel Ratio Imbalance. ● P219B - Bank 2 Air-fuel Ratio Imbalance.** ● P032F - Combustion Engine Producing Insufficient Torque. Customers may experience one or more of the following: ● **Engine speed surging, unstable, hunting, or oscillating while coasting at low vehicle speeds. ● Stationary Idle Power Take off (PTO) feature is not activating when the user configuration is selected to require parking brake be set (DD/DP Only). ● PTO not auto-resuming after hard-wired remote start (DD/DP Only).** ● Driveline clunk or bump…

BUICK, CHEVROLET · 2026-01-22

This Preliminary information communicates to the dealers diagnostic tips related to MIL on with P219A.

JEEP · 2025-11-18

Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P0133 - O2 Sensor 1/1 Slow response. ● P2453 - Particulate Filter Pressure Sensor “A” Circuit Range/Performance. ● P245F - Particulate Filter Pressure Sensor “B” Circuit Range/Performance. ● P0420 - Catalyst System Efficiency Below Threshold Bank 1. ● P0017 - Crankshaft/camshaft Timing Misalignment - Bank 1 Sensor 2. ● P000A - Bank 1 Camshaft 1 Position Slow Response. ● P219A - Bank 1 Air-fuel Ratio Imbalance. Customers may also experience the following: ● A no crank/no start condition. In addition, the following software enhancement is available: ● Smart charge change:…

JEEP · 2025-11-18

Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P0133 - O2 Sensor 1/1 Slow response. ● P2453 - Particulate Filter Pressure Sensor “A” Circuit Range/Performance. ● P245F - Particulate Filter Pressure Sensor “B” Circuit Range/Performance. ● P0420 - Catalyst System Efficiency Below Threshold Bank 1. ● P0017 - Crankshaft/camshaft Timing Misalignment - Bank 1 Sensor 2. ● P000A - Bank 1 Camshaft 1 Position Slow Response. ● P219A - Bank 1 Air-fuel Ratio Imbalance. Customers may also experience the following: ● A no crank/no start condition. In addition, the following software enhancement is available: ● Smart charge change:…

BUICK, CHEVROLET · 2025-10-17

This Preliminary information communicates to the dealers diagnostic tips related to MIL on with P219A.

BUICK, CHEVROLET · 2025-10-09

This Preliminary information communicates to the dealers diagnostic tips related to MIL on with P219A.

BUICK, CHEVROLET · 2025-08-08

This Preliminary information communicates to the dealers diagnostic tips related to MIL on with P219A.

JEEP · 2025-08-01

Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P0133 - O2 Sensor 1/1 Slow response. ● P2453 - Particulate Filter Pressure Sensor “A” Circuit Range/Performance. ● P245F - Particulate Filter Pressure Sensor “B” Circuit Range/Performance. ● P0420 - Catalyst System Efficiency Below Threshold Bank 1. ● P0017 - Crankshaft/camshaft Timing Misalignment - Bank 1 Sensor 2. ● P000A - Bank 1 Camshaft 1 Position Slow Response. ● P219A - Bank 1 Air-fuel Ratio Imbalance. Customers may also experience the following: ● A no crank/no start condition. In addition, the following software enhancement is available: ● Smart charge change:…

JEEP · 2025-07-25

Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● **P0133 - O2 Sensor 1/1 Slow response. ● P2453 - Particulate Filter Pressure Sensor “A” Circuit Range/Performance. ● P245F - Particulate Filter Pressure Sensor “B” Circuit Range/Performance.** ● P0420 - Catalyst System Efficiency Below Threshold Bank 1. ● P0017 - Crankshaft/camshaft Timing Misalignment - Bank 1 Sensor 2. ● P000A - Bank 1 Camshaft 1 Position Slow Response. ● P219A - Bank 1 Air-fuel Ratio Imbalance. Customers may also experience the following: ● A no crank/no start condition. In addition, the following software enhancement is available: ● Smart Charge change:…

JEEP · 2025-06-25

Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician must find one or more of the following Diagnostic Trouble Codes (DTCs) have been set: ● U0168 - Lost Communication With Vehicle Security Control Module. ● P0629 - Fuel Pump Control Circuit High. ● P0171 - Fuel system Lean. ● P0087 - Fuel Rail Pressure Too Low - Bank 1. Customers may also experience one or more of the following: ● Vehicle not starting. ● Variable speed fuel pump doesn't start after refueling. ● The Instrument Panel Cluster (IPC) unable to calculate the instantaneous fuel economy under heavy acceleration. ● The oxygen sensor can give incorrect values when entering Electric Vehicle (EV) mode. False fault detection…

BUICK, CHEVROLET · 2025-06-21

This Preliminary information communicates to the dealers diagnostic tips related to MIL on with P219A.

JEEP · 2025-04-30

"Flash: Powertrain Control Module (PCM) Updates. Customers must experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician must find one or more of the following Diagnostic Trouble Codes (DTCs) have been set: ● **U0168 - Lost Communication With Vehicle Security Control Module.** ● P0629 - Fuel Pump Control Circuit High. ● P0171 - Fuel system Lean. ● P0087 - Fuel Rail Pressure Too Low - Bank 1. Customers may also experience one or more of the following: ● **Vehicle not starting.** ● Variable speed fuel pump doesn't start after refueling. ● The Instrument Panel Cluster (IPC) unable to calculate the instantaneous fuel economy under heavy acceleration. ● The oxygen sensor can give incorrect values when entering Electric Vehicle (EV) mode. False fault…

JEEP · 2025-03-08

"Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P0420 - Catalyst System Efficiency Below Threshold Bank 1. ● P0017 - Crankshaft/camshaft Timing Misalignment - Bank 1 Sensor 2. ● P000A - Bank 1 Camshaft 1 Position Slow Response. ● P219A - Bank 1 Air-fuel Ratio Imbalance. Customers may also experience the following: ● A no crank/no start condition. In addition, the following software enhancement is available: ● Smart Charge change: Battery life improvements This bulletin involves possibly replacing the Oil control valves (OCV)s, and/or the Catalytic Converter and also reprogramming the PCM with the latest available…

BUICK, CHEVROLET · 2025-03-07

This Preliminary information communicates to the dealers diagnostic tips related to MIL on with P219A.

BUICK, CHEVROLET · 2025-03-06

This engineering information (EI) closure ends the need for gathering further information from technicians in regard to Check Engine Lamp illuminated on DIC with DTC P219A set.

BUICK, CHEVROLET · 2025-02-14

This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regard to the Check Engine Lamp illuminated on Driver Information Center (DIC), with DTC P219A set.

FORD, LINCOLN · 2025-01-30

Some 2023-2025 Explorer/Aviator vehicles equipped with the 3.0L EcoBoost engine and up to 15,000 miles (24,140 km) may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P219A (Bank 1 Air-Fuel Ratio Imbalance) and/or P219B (Bank 2 Air-Fuel Ratio Imbalance) stored in the powertrain control module (PCM) with no effect on vehicle operation.

RAM · 2025-01-25

"Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● **P0300 - Multiple Cylinder Misfire. ● P0301 - Cylinder 1 Misfire. ● P0304 - Cylinder 4 Misfire. ● P0306 - Cylinder 6 Misfire. ● P0307 - Cylinder 7 Misfire. ● P3400 - Cylinder Deactivation System - Bank 1. ● P3497 - Cylinder Deactivation System - Bank 2. ● P3401 - Cylinder 1 Deactivation Control Circuit. ● P3425 - Cylinder 4 Deactivation Control Circuit. ● P3441 - Cylinder 6 Deactivation Control Circuit. ● P3449 - Cylinder 7 Deactivation Control Circuit. ● P1411 - Cylinder 1 Reactivation Control Performance. ● P1414 - Cylinder 4 Reactivation Control Performance. ● P1416 -…

BUICK, CHEVROLET · 2025-01-17

This Preliminary information communicates to the dealers diagnostic tips related to MIL on with P219A.

BUICK, CHEVROLET · 2024-12-16

This Preliminary information communicates to the dealers diagnostic tips related to MIL on with P219A.

ALFA ROMEO · 2024-12-13

"Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set the following Diagnostic Trouble Codes (DTCs): ● **P2601-00 - Electric Coolant Pump Control Circuit Performance Stuck Off.** ● P219A - Bank 1 Air-Fuel Ratio Imbalance. This bulletin involves reprogramming the PCM with the latest available software"

DODGE · 2024-12-13

"Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set the following Diagnostic Trouble Codes (DTCs): ● **P2601-00 - Electric Coolant Pump Control Circuit Performance Stuck Off.** ● P219A - Bank 1 Air-Fuel Ratio Imbalance. This bulletin also includes software diagnostic enhancements. This bulletin involves reprogramming the PCM with the latest available software"

DODGE · 2024-11-23

"Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set the following Diagnostic Trouble Code (DTC): ● P219A - Bank 1 Air-fuel Ratio Imbalance. This bulletin involves reprogramming the PCM with the latest available software"

DODGE · 2024-11-10

"Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set the following Diagnostic Trouble Code (DTC): ● P219A - Bank 1 Air-Fuel Ratio Imbalance. **This bulletin also includes software diagnostic enhancements.** This bulletin involves reprogramming the PCM with the latest available software."

BUICK, CHEVROLET, GMC · 2024-10-16

This service bulletin provides repair information to correct a customer concern of Malfunction Indicator Lamp (MIL) Illuminated - DTC P219A Set As Current Or History.

FORD, LINCOLN · 2024-09-18

Some 2023-2025 Explorer/Aviator vehicles equipped with the 3.0L EcoBoost engine and up to 15,000 miles (24,140 km) may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P219A (Bank 1 Air-Fuel Ratio Imbalance) and/or P219B (Bank 2 Air-Fuel Ratio Imbalance) stored in the powertrain control module (PCM) with no effect on vehicle operation.