U0198 · Comunicados do fabricante

MAZDA · 2026-09-18

DESCRIPTION Some customers may experience a message "TCU Malfunction. Have the Vehicle Inspected" in the instrument cluster. Additional symptoms that may occur: Connected Vehicle One Time Passcode (OTP) may fail. Connected Vehicle Remote functions may fail. The following DTC's may be stored: B1252:87-8B:TCU - COMMUNICATION ERROR WITH CONNECTIVITY MASTER UNIT (CMU) U0198:00-03:CMU - COMMUNICATION ERROR WITH EMERGENCY CALL UNIT/TELEMATICS COMMUNICATION UNIT REPAIR PROCEDURE 1. Verify the concern. 2. Check if any of the following DTCs are stored: B1252:87-8B:TCU - COMMUNICATION ERROR WITH CONNECTIVITY MASTER UNIT (CMU) U0198:00-03:CMU - COMMUNICATION ERROR WITH EMERGENCY CALL UNIT/TELEMATICS COMMUNICATION UNIT Are the following DTCs stored? YES: Proceed to next step. NO: This service…

MAZDA · 2026-08-07

This Service Alert supersedes the previously issued SA(s) listed below. The changes are noted in Red. SA-012/26 04/17/26, 03/04/26 and 02/26/2026 DESCRIPTION Some customers may experience a message "TCU Malfunction. Have the Vehicle Inspected" in the instrument cluster. Additional symptoms that may occur: Connected Vehicle One Time Passcode (OTP) may fail. Connected Vehicle Remote functions may fail. The following DTC's may be stored: B1252:87-8B:TCU - COMMUNICATION ERROR WITH CONNECTIVITY MASTER UNIT (CMU) U0198:00-03:CMU - COMMUNICATION ERROR WITH EMERGENCY CALL UNIT/TELEMATICS COMMUNICATION UNIT REPAIR PROCEDURE 1. Verify the concern. 2. Check if any of the following DTCs are stored: B1252:87-8B:TCU - COMMUNICATION ERROR WITH CONNECTIVITY MASTER UNIT (CMU) U0198:00-03:CMU -…

MAZDA · 2026-04-18

Some customers may experience a message "TCU Malfunction. Have the Vehicle Inspected" in the instrument cluster. Additional symptoms that may occur: Connected Vehicle One Time Passcode (OTP) may fail. • Connected Vehicle Remote functions may fail. • The following DTC's may be stored: B1252:87-8B:TCU - COMMUNICATION ERROR WITH CONNECTIVITY MASTER UNIT (CMU) • U0198:00-03:CMU - COMMUNICATION ERROR WITH EMERGENCY CALL UNIT/TELEMATICS COMMUNICATION UNIT REPAIR PROCEDURE 1. Verify the concern. 2. Check if any of the following DTCs are stored: B1252:87-8B:TCU - COMMUNICATION ERROR WITH CONNECTIVITY MASTER UNIT (CMU) • U0198:00-03:CMU - COMMUNICATION ERROR WITH EMERGENCY CALL UNIT/TELEMATICS COMMUNICATION UNIT Are the following DTCs stored? YES: Proceed to next step. • NO: This service…

MAZDA · 2026-03-04

This Service Alert supersedes the previously issued SA(s) listed below. The changes are noted in Red. SA-012/26 02/26/2026 DESCRIPTION Some customers may experience a message "TCU Malfunction. Have the Vehicle Inspected" in the instrument cluster. Additional symptoms that may occur: Connected Vehicle One Time Passcode (OTP) may fail. Connected Vehicle Remote functions may fail. The following DTC's may be stored: B1252:87-8B:TCU - COMMUNICATION ERROR WITH CONNECTIVITY MASTER UNIT (CMU) U0198:00-03:CMU - COMMUNICATION ERROR WITH EMERGENCY CALL UNIT/TELEMATICS COMMUNICATION UNIT REPAIR PROCEDURE 1. Verify the concern. 2. Check if any of the following DTCs are stored: B1252:87-8B:TCU - COMMUNICATION ERROR WITH CONNECTIVITY MASTER UNIT (CMU) U0198:00-03:CMU - COMMUNICATION ERROR WITH EMERGENCY…

MAZDA · 2026-02-27

This Service Alert supersedes the previously issued SA(s) listed below. The changes are noted in Red. SA-060/25 12/16/25 Some customers may experience a message "TCU Malfunction. Have the Vehicle Inspected" in the instrument cluster. Additional symptoms that may occur: Connected Vehicle One Time Passcode (OTP) may fail. Connected Vehicle Remote functions may fail. The following DTC's may be stored: B1252:87-8B:TCU - COMMUNICATION ERROR WITH CONNECTIVITY MASTER UNIT (CMU) U0198:00-03:CMU - COMMUNICATION ERROR WITH EMERGENCY CALL UNIT/TELEMATICS COMMUNICATION UNIT

MAZDA · 2025-12-17

Some customers may experience a message "TCU Malfunction. Have the Vehicle Inspected" in the instrument cluster. The following DTC's may be stored: B1252:87-8B:TCU - COMMUNICATION ERROR WITH CONNECTIVITY MASTER UNIT (CMU) • U0198:00-03:CMU - COMMUNICATION ERROR WITH EMERGENCY CALL UNIT/TELEMATICS COMMUNICATION UNIT

FORD · 2023-04-25

Some 2023 F-Super Duty vehicles may set DTCs B109F:55, B1330:9A, U0252:87, U0198:87, U0184:87, U0155:87, U0256:87, and/or U0100:87 in the BCM when a diagnostic self-test is performed. This may be due to an incorrect sequence of an internal measurement unit during self-test causing a false history status DTC (0x48 or 0x08 status). The DTC matures to history status because the BCM detects nothing is wrong. Replacement or reprogramming of the BCM will not resolve this condition. B109F:55, B1330:9A, U0252:87, U0198:87, U0184:87, U0155:87, U0256:87, and/or U0100:87 should be ignored if: no other DTCs are present in the BCM, the malfunction indicator lamp (MIL) is not illuminated while the engine is running, and no drivability concerns are present. No further service action is required.

FORD · 2023-02-06

Some 2022 Transit vehicles may exhibit a DTC U0198:00 stored in the APIM but does not exhibit any customer concerns around the vehicle location or global positioning system (GPS). This may be due to the software in the gateway module (GWM). To correct the condition, follow the Service Procedure to reprogram the GWM.

FORD · 2023-01-16

Some 2022 F-150 vehicles built on 04-Aug-2022 and through 20-Sep-2022 at Dearborn Truck Plant (DTP) may exhibit inoperative FordPass activation, a Feature Unavailable error message when trying to activate the vehicle from FordPass, a telematics control unit (TCU) not responding to network test while using the Ford Diagnosis and Repair System (FDRS), diagnostic trouble codes (DTCs) U2402:00 and U2402:92 stored in the gateway module (GWM), and U0198:00 stored in the accessory protocol interface module (APIM). This may be due to absence of TCU. Check for TCU presence and if missing, install TCU and perform programmable module installation (PMI) using the latest software level of FDRS. For claiming, use causal part number 14F546 and applicable labor times from Section 10 of the Service Labor…

FORD · 2023-01-09

Some 2022 F-150 vehicles built on 04-Aug-2022 and through 20-Sep-2022 at Dearborn Truck Plant (DTP) may exhibit inoperative FordPass activation, a FEATURE UNAVAILABLE error message when trying to activate the vehicle from FordPass, a TCU not responding to Network test while using the Ford Diagnosis and Repair System (FDRS), Diagnostic Trouble Codes (DTCs) U2402:00 and U2402:92 stored in the Gateway Module (GWM), and U0198:00 stored in the Accessory Protocol Interface Module (APIM). This may be due to absence of TCU. Check for TCU presence and if missing, install TCU and perform Programmable Module Installation (PMI) using the latest software level of FDRS. For claiming, use causal part number 14C708 and applicable labor times from Section 10 of the Service Labor Times Standard (SLTS)…

FORD · 2022-08-09

Some 2022 Transit vehicles may exhibit a DTC U0198:00 stored in the APIM but does not exhibit any customer concerns around the vehicle location or global positioning system (GPS). If the vehicle exhibits GPS or location concerns, continue with normal Workshop Manual (WSM) diagnostics. This DTC alone does not affect vehicle durability and no additional diagnosis or service is required for this condition at this time. Inform customers that they can continue to drive the vehicle and engineering is currently working on a solution for this condition that is expected in August 2022. Replacement or reprogramming of the telematics control unit (TCU) will not resolve this condition. Monitor OASIS for additional information and inform the customer that service appointments for customers will be…

CADILLAC, CHEVROLET, GMC · 2020-11-17

This Preliminary information communicates a customer concern of IPC gauges inoperative or fluctuate, No Start, No Crank, SIR Light / Service Airbag Message, Service Suspension Message, Radio display blank, Steering Wheel Controls (SWC) not illuminated, Turn Signal no audible feedback, HVAC controls inoperative. During diagnostics a technician may find any of the following DTC's: B1011, B1370, B3980, U0020, U0029, U007D, U0073, U0078, U0100, U0101, U0102, U0104, U0140, U0151, U0155, U0164, U0184, U0186, U0198, U0422. Dealer is instructed to check for logic lock of Serial Data Gateway Module or for Serial Data Gateway Module X1 and X2 connectors having terminal concerns and repair as needed.

CADILLAC, CHEVROLET, GMC · 2020-11-05

This Preliminary information communicates a customer concern of IPC gauges inoperative or fluctuate, No Start, No Crank, SIR Light / Service Airbag Message, Service Suspension Message, Radio display blank, Steering Wheel Controls (SWC) not illuminated, Turn Signal no audible feedback, HVAC controls inoperative. During diagnostics a technician may find any of the following DTC's: B1011, B1370, B3980, U0020, U0029, U007D, U0073, U0078, U0100, U0101, U0102, U0104, U0140, U0151, U0155, U0164, U0184, U0186, U0198, U0422. Dealer is instructed to check for logic lock of Serial Data Gateway Module or for Serial Data Gateway Module X1 and X2 connectors having terminal concerns and repair as needed.

CADILLAC, CHEVROLET, GMC · 2020-10-01

This Preliminary information communicates a customer concern of IPC gauges inoperative or fluctuate, No Start, No Crank, SIR Light / Service Airbag Message, Service Suspension Message, Radio display blank, Steering Wheel Controls (SWC) not illuminated, Turn Signal no audible feedback, HVAC controls inoperative. During diagnostics a technician may find any of the following DTC's: B1011, B1370, B3980, U0020, U0029, U007D, U0073, U0078, U0100, U0101, U0102, U0104, U0140, U0151, U0155, U0164, U0184, U0186, U0198, U0422. Dealer is instructed to check for logic lock of Serial Data Gateway Module or for Serial Data Gateway Module X1 and X2 connectors having terminal concerns and repair as needed.

BUICK, CHEVROLET · 2020-09-23

This technical bulletin provides repair information to correct customer concerns of Power Liftgate and/or Instrument Panel Cluster (IPC) Inoperative, No Audio, AWD/ 2WD Light Toggles Randomly, Malfunction Indicator Lamp (MIL) Illuminated - DTC P0650, P15A1, P159F-00, U0184-00, U0198-00 and/or U1501-00 Set.

MAZDA · 2020-09-10

Some customers may experience a "IN-VEHICLE NETWORK MALFUNCTION" warning message in the instrument cluster with one or more of the following DTC's stored: à ̄‚· B119F:01 TCU - Tel antenna No. 1 malfunctionà ̄‚· B119F:13 (TCU - TEL antenna No.1 circuit malfunction)à ̄‚· B119F:2B (CMU - GPS antenna signal circuit malfunction)à ̄‚· B1252:87 TCU - Communication error with connectivity master unit (CMU)à ̄‚· U0156:00 VCM - Communication error with connectivity master unit (CMU)à ̄‚· U0156:00 BCM - Communication error with connectivity master unit (CMU)à ̄‚· U0198:00 BCM - Communication error with emergency call unità ̄‚· U212D:00 BCM - Communication error with light control module (RH)à ̄‚· U3000:00 TCU - Telematics communication unit internal malfunctionà ̄‚· Low Voltage…

BUICK, CHEVROLET · 2020-07-07

This technical bulletin provides repair information to correct a customer concern of Power Liftgate and/or Instrument Panel Cluster (IPC) Inoperative, No Audio, Malfunction Indicator Lamp (MIL) Illuminated - DTC P159F-00, U0184-00, U0198-00 and/or U1501-00 Set.

MAZDA · 2020-06-29

Some customers may experience a "IN-VEHICLE NETWORK MALFUNCTION" warning message in the instrument cluster with one or more of the following DTC's stored:à ̄‚· B119F:01 TCU - Tel antenna No. 1 malfunction à ̄‚· B119F:13 (TCU - TEL antenna No.1 circuit malfunction) à ̄‚· B119F:2B (CMU - GPS antenna signal circuit malfunction) à ̄‚· B1252:87 TCU - Communication error with connectivity master unit (CMU) à ̄‚· U0156:00 VCM - communication error with connectivity master unit (CMU) à ̄‚· U0156:00 BCM - Communication error with connectivity master unit (CMU) à ̄‚· U0198:00 BCM - Communication error with emergency call unit à ̄‚· U212D:00 BCM - Communication error with light control module (RH) à ̄‚· U3000:00 TCU - Telematics communication unit internal malfunction à ̄‚· Low…

MAZDA · 2020-06-23

Some customers may experience a "IN-VEHICLE NETWORK MALFUNCTION" warning message in the instrument cluster with one or more of the following DTC's stored:à ̄‚· B119F:01 TCU - Tel antenna No. 1 malfunction à ̄‚· B119F:13 (TCU - TEL antenna No.1 circuit malfunction) à ̄‚· B119F:2B (CMU - GPS antenna signal circuit malfunction) à ̄‚· B1252:87 TCU - Communication error with connectivity master unit (CMU) à ̄‚· U0156:00 VCM - communication error with connectivity master unit (CMU) à ̄‚· U0156:00 BCM - Communication error with connectivity master unit (CMU) à ̄‚· U0198:00 BCM - Communication error with emergency call unit à ̄‚· U212D:00 BCM - Communication error with light control module (RH) à ̄‚· U3000:00 TCU - Telematics communication unit internal malfunction à ̄‚· Low…

MAZDA · 2020-06-05

Some customers may experience a "IN-VEHICLE NETWORK MALFUNCTION" warning message in the instrument cluster with one or more of the following DTC's stored: à ̄‚· B119F:01 TCU - Tel antenna No. 1 malfunction à ̄‚· B1252:87 TCU - Communication error with connectivity master unit (CMU) à ̄‚· U0156:00 VCM - communication error with connectivity master unit (CMU) à ̄‚· U0156:00 BCM - Communication error with connectivity master unit (CMU) à ̄‚· U0198:00 BCM - Communication error with emergency call unit à ̄‚· U212D:00 BCM - Communication error with light control module (RH) à ̄‚· U3000:00 TCU - Telematics communication unit internal malfunction à ̄‚· Low Voltage Battery DTCs

MAZDA · 2020-04-08

Some customers may experience a "IN-VEHICLE NETWORK MALFUNCTION" warning message in the instrument cluster with one or more of the following DTC's stored: à ̄‚· B119F:01 TCU - Tel antenna No. 1 malfunction à ̄‚· B1252:87 TCU - Communication error with connectivity master unit (CMU) à ̄‚· U0156:00 VCM - Communication error with connectivity master unit (CMU) à ̄‚· U0156:00 BCM - Communication error with connectivity master unit (CMU) à ̄‚· U0198:00 BCM - Communication error with emergency call unit à ̄‚· U212D:00 BCM - Communication error with light control module (RH) à ̄‚· U3000:00 TCU - Telematics communication unit internal malfunction à ̄‚· Low Battery DTCs

CADILLAC, CHEVROLET, GMC · 2020-03-11

This Preliminary information communicates a customer concern of IPC gauges inoperative or fluctuate, No Start, No Crank, SIR Light / Service Airbag Message, Service Suspension Message, Radio display blank, Steering Wheel Controls (SWC) not illuminated, Turn Signal no audible feedback, HVAC controls inoperative. During diagnostics a technician may find any of the following DTC's: B1011, B1370, B3980, U0020, U0029, U007D, U0073, U0078, U0100, U0101, U0102, U0104, U0140, U0151, U0155, U0164, U0184, U0186, U0198, U0422. Dealer is instructed to check Serial Data Gateway Module X2 connector for terminal concerns and repair as needed.

MAZDA · 2020-02-25

Some customers may experience a "IN-VEHICLE NETWORK MALFUNCTION" warning message in the instrument cluster with one or more of the following DTC's stored: B119F:01 TCU - Tel antenna No. 1 malfunction B1252:87 TCU - Communication error with connectivity master unit (CMU) U0156:00 VCM - Communication error with connectivity master unit (CMU) U0156:00 BCM - Communication error with connectivity master unit (CMU) U0198:00 BCM - Communication error with emergency call unit U212D:00 BCM - Communication error with light control module (RH) U3000:00 TCU - Telematics communication unit internal malfunction

FORD, LINCOLN · 2019-10-17

Some 2018-2020 Ford and Lincoln vehicles equipped with a TCU may exhibit inoperative remote features via Ford Pass/Lincoln Way mobile app, incomplete user authorization and/or accessory protocol interface module (APIM) DTC U0198 or no modem electronic serial number (ESN) displayed. To correct this condition prior to programing remove the TCU fuse for 5 minutes then reinstall. Delete all previous session files for the vehicle. Verify that the electronic serial number (ESN) is now displayed. Start a new IDS/FDRS session. Program the TCU to the latest IDS/FDRS version level. Make sure you are connected to the internet before retesting. If the concern is still present, follow normal diagnostics in Workshop Manual(WSM), Section 415-00. Refer to PTS OASIS home page for TCU version…

FORD, LINCOLN · 2019-10-14

Some 2017-2020 Ford and Lincoln vehicles equipped with a TCU may exhibit inoperative remote features via Ford Pass/Lincoln Way mobile app, incomplete user authorization and/or accessory protocol interface module (APIM) DTC U0198 or no modem electronic serial number (ESN) displayed. To correct this condition prior to programming, remove the TCU fuse for 5 minutes then reinstall. Delete all previous session files for the vehicle. Verify that the electronic serial number (ESN) is now displayed. Start a new IDS/FDRS session. Program the TCU to the latest IDS/FDRS version level. Make sure you are connected to the internet before retesting. If the concern is still present, follow normal diagnostics in Workshop Manual(WSM), Section 415-00. Refer to PTS OASIS home page for TCU version…

CADILLAC, CHEVROLET, GMC · 2019-06-24

This Preliminary information communicates a customer concern of IPC gauges inoperative or fluctuate, No Start, No Crank, SIR Light / Service Airbag Message, Service Suspension Message, Radio display blank, Steering Wheel Controls (SWC) not illuminated, Turn Signal no audible feedback, HVAC controls inoperative. During diagnostics a technician may find any of the following DTC's: B1011, B1370, B3980, U0020, U0029, U007D, U0073, U0078, U0100, U0101, U0102, U0104, U0140, U0151, U0155, U0164, U0184, U0186, U0198, U0422. Dealer is instructed to check Serial Data Gateway Module X2 connector for terminal concerns and repair as needed.

FORD, LINCOLN · 2019-02-21

Some 2018-2019 Ford and Lincoln vehicles equipped with a TCU may exhibit inoperative remote features via Ford Pass/Lincoln Way mobile app, incomplete user authorization and/or accessory protocol interface module (APIM) DTC U0198 or no modem electronic serial number (ESN) displayed. To correct this condition prior to programing remove the TCU fuse for 5 minutes then reinstall. Delete all previous session files for the vehicle. Verify that the electronic serial number (ESN) is now displayed. Start a new IDS/FDRS session. Program the TCU to the latest IDS/FDRS version level. Make sure you are connected to the internet before retesting. If the concern is still present, follow normal diagnostics in Workshop Manual(WSM), Section 415-00. Refer to PTS OASIS home page for TCU version…

FORD, LINCOLN · 2019-01-17

Some 2018-2019 Ford and Lincoln vehicles equipped with a TCU may exhibit inoperative remote features via Ford Pass/Lincoln Way mobile app, incomplete user authorization and/or accessory protocol interface module (APIM) DTC U0198 or no modem electronic serial number (ESN) displayed. To correct this condition prior to programing remove the TCU fuse for 5 minutes then reinstall. Delete all previous session files for the vehicle. Verify that the electronic serial number (ESN) is now displayed. Start a new IDS/FDRS session. Program the TCU to the latest IDS/FDRS version level. Make sure you are connected to the internet before retesting. If the concern is still present, follow normal diagnostics in Workshop Manual(WSM), Section 415-00. Refer to PTS OASIS home page for TCU version…

FORD, LINCOLN · 2019-01-07

Some 2018-2019 Ford and Lincoln vehicles equipped with a TCU may exhibit inoperative remote features via Ford Pass/Lincoln Way mobile app, incomplete user authorization and/or accessory protocol interface module (APIM) DTC U0198 or no modem electronic serial number (ESN) displayed. To correct this condition, remove the TCU fuse for 5 minutes prior to programing. Delete all previous session files for the vehicle and do not install the TCU fuse until a new IDS session has been started. Once the new session has been started and the fuse reinstalled, the TCU can be programmed. Make sure you are connected to the internet before retesting. If the concern is still present, follow normal diagnostics in Workshop Manual (WSM), Section 415-00. Refer to PTS OASIS home page for TCU version…

CADILLAC, CHEVROLET, GMC · 2018-08-27

This Preliminary information communicates a customer concern ofIPC gauges inoperative or fluctuate, No Start,No Crank,SIR Light / Service Airbag Message, Service Suspension Message,Radio display blank, Steering Wheel Controls (SWC) not illuminated, Turn Signal no audible feedback,HVAC controls inoperative. During diagnostics a technician may find any of the following DTC's: B1011, B1370, B3980, U0020, U0029, U007D, U0073, U0078, U0100, U0101, U0102, U0104, U0140, U0151, U0155, U0164,U0184, U0186, U0198, U0422. Dealer is instructed to check Serial Data Gateway Module X2 connector for terminal concerns and repair as needed.