# Service bulletin 08\-027\-21

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10188829
- Published by NHTSA: 2021\-03\-15
- Manufacturer's number: 08\-027\-21
- Manufacturer's date: 2021\-02\-27
- NHTSA component: POWER TRAIN

## NHTSA's summary

Flash: Drivetrain Control Module \(DTCM\) Diagnostic and System Improvements This bulletin involves reprogramming the DTCM with the latest available software. Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes \(DTCs\):C2502\-64 \- Signal Plausibility Failure. C2210\-92 \- ETM Hall Sensor Performance Or Incorrect Operation. C2220\-54 \- ETM Calibration Error Missing Calibration. C2020\-01 \- ECU Internal Fault \- General Electrical Failure. This software update also includes the following enhancementsReduce Rear Drive Module \(RDM\) noise during disconnect phase at speeds above 45 kph \(28 mph\)North America Only.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10188829-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10188829-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Transmission and driveline

## Trouble codes named

C2020, C2210, C2220, C2502

## Vehicles listed

- 2015 FIAT 500
- 2016 to 2018 FIAT 500X
- 2015 to 2018 JEEP RENEGADE

## Recalls for the same vehicles and component

- [2018422](/recalls/tc/2018422.md), 2018-08-09: Powertrain
- [2016361](/recalls/tc/2016361.md), 2016-07-13: Powertrain
- [16V529000](/recalls/nhtsa/16V529000.md), 2016-07-12: POWER TRAIN:AUTOMATIC TRANSMISSION
- [16V302000](/recalls/nhtsa/16V302000.md), 2016-05-16: POWER TRAIN:MANUAL TRANSMISSION
- [2016217](/recalls/tc/2016217.md), 2016-05-12: Powertrain
- [15V291000](/recalls/nhtsa/15V291000.md), 2015-05-18: POWER TRAIN:AUTOMATIC TRANSMISSION

## Other bulletins for the same vehicles and component

- [21\-040\-25](/bulletins/11024056.md), 2025-10-08, Service bulletin: POWER TRAIN. 948TE Transmission Reaction Shaft Service Bushing Kit Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle may exhibit/set the following Diagnostic Trouble Code \(DTC\): ● P1DB7\-00 \- Torque Converter Clutch Performance.
- [S2325000007](/bulletins/10248564.md), 2024-01-08, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). MIL/check engine lamp comes on after performing U90 recall PCM software update.
- [S2325000007](/bulletins/10244403.md), 2023-10-30, Service bulletin: POWER TRAIN; ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). MIL/check engine lamp comes on after performing U90 recall PCM software update.
- [W84](/bulletins/10230242.md), 2023-01-17, Service bulletin: POWER TRAIN. Customer Satisfaction Notification W84 Powertrain Software Update
- [1805814a](/bulletins/10229923.md), 2023-01-17, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN. Flash: MIL Illumination, P0141 Oxygen Sensor 1/2 Heater Performance This bulletin involves reprogramming the Powertrain Control Module \(PCM\) with the latest software. The customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find Diagnostic Trouble Code \(DTC\) P0141 Oxygen Sensor 1/2 Heater Performance. Improved reverse lamp activation time \(auto trans only\).
- [1805520](/bulletins/10229345.md), 2023-01-09, Service bulletin: BACK OVER PREVENTION; ELECTRICAL SYSTEM; SERVICE BRAKES; POWER TRAIN; STEERING; EXTERIOR LIGHTING. Flash: Powertrain Control Module \(PCM\) Updates This bulletin involves reprogramming the Powertrain Control Module \(PCM\) with the latest available software. Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes \(DTCs\):U0402 \- Implausible Data Received From TCM. P1DD2 \- Torque Request Signal From TCM Denied. U1424 \- Implausible Engine Torque Signal Received. P0101 \- Mass Air Flow Sensor "A" Circuit Performance. U0418 \- Invalid Data Received From Brake System Control Module. P0128 \- Thermostat Rationality. P0703 \- Brake Switch 2 Performance. P1185 \- General Pressure Sensor Correlation. U1504 \- Implausible Message Data Length Received From Steering Angle Sensor. Customers may also experience the following:Vehicle periodically may fail to start\(ED6 engine only\). In addition, the following software enhancements are available:Changes which allow the catalytic convertor to operate cooler. Multiair solenoid electrical opening change to resolve idle tick/tap issue. Cruise control enhancements.
- [2102415\-1](/bulletins/10229250.md), 2023-01-09, Service bulletin: POWER TRAIN; BACK OVER PREVENTION; ELECTRICAL SYSTEM; EXTERIOR LIGHTING. Flash: Transmission Shift And Drivability Enhancements This bulletin involves reprogramming the Transmission Control Module \(TCM\) with the latest available software. A small number of customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes \(DTCs\): ? P0711 \- Transmission Fluid Temperature Sensor A Circuit Range\-Performance ? P1CC9 \- Unable to Engage Gear ? P1D98 \- Incorrect Gear Ratio Clutch B or D Defective ? P1DAD \- Input Shaft\-Output Shaft Direction Correlation ? U1424 \- Implausible Engine Torque Signal Received In addition, the customer may also experience one or more of the following transmission related conditions: ? Less than desired 1\-2 upshift on tip\-in acceleration. ? Less than desired accelerator pedal response in Sport and TractionPlus modes. ? RPM flare at engine start. ? Less than desired idle performance when shifting into DRIVE or REVERSE following a cold start.
- [2103615](/bulletins/10229247.md), 2023-01-09, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN. Flash: Transmission Shift And Drivability Enhancements This bulletin involves reprogramming the Transmission Control Module \(TCM\) with the latest available software. A small number of customers may experience or notice harsh shifts.
- [2103215](/bulletins/10229237.md), 2023-01-09, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN; BACK OVER PREVENTION; EXTERIOR LIGHTING. Flash: Transmission Shift And Drivability Enhancements This bulletin involves reprogramming the Transmission Control Module \(TCM\) with the latest available software. A small number of customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes \(DTCs\). ? P0711 \- Transmission Fluid Temperature Sensor A Circuit Range\-Performance ? P0887 \- TCM Power Control Circuit High ? P1CC9 \- Unable to Engage Gear ? P1D98 \- Incorrect Gear Ratio Clutch B or D Defective ? U0401 \- Implausible Data Received From ECM\-PCM
- [2103015](/bulletins/10229235.md), 2023-01-09, Service bulletin: BACK OVER PREVENTION; ELECTRICAL SYSTEM; EXTERIOR LIGHTING; POWER TRAIN. Flash: Transmission Shift And Drivability Enhancements This bulletin involves reprogramming the Transmission Control Module \(TCM\) with the latest available software. A small number of customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find one or both of the following Diagnostic Trouble Codes \(DTCs\). ? P0711 \- Transmission Fluid Temperature Sensor A Circuit Range\-Performance ? P1DAD \- Input Shaft\-Output Shaft Direction Correlation ? P1CC9 \- Unable to Engage Gear ? P1D98 \- Incorrect Gear Ratio Clutch B or D Defective ? U1424 \- Implausible Engine Torque Signal Received

JSON: [/v1/bulletins/10188829](/v1/bulletins/10188829)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%2008-027-21&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10188829&vehicle=Service%20bulletin%2008-027-21)