# Service bulletin 18\-068\-20 REV. B

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: 10181621
- Published by NHTSA: 2020\-10\-26
- Manufacturer's number: 18\-068\-20 REV. B
- Manufacturer's date: 2020\-09\-19
- NHTSA component: POWER TRAIN

## NHTSA's summary

Flash: Powertrain Control Module \(PCM\) Updates This bulletin involves reprogramming the 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 \(DTCs\) have been set:P1D30\-00 \- Oil Viscosity Too Low. Attempting to clear the DTC P1D30\-00 will be unsuccessful. P2453\-00 \- Diesel Particulate Filter Differential Pressure Sensor Circuit Performance. P0401\-00 \- EGR Flow Insufficient Detected. P0133\-00 \- O2 Sensor 1/1 Slow Response. P20EE\-00 \- SCR NOX Catalyst Efficiency Below Threshold Bank 1. P050E\-00 \- Cold Start Engine Exhaust Temperature Too Low. P0299\-00 \- Turbocharger Underboost condition. P0402\-00 \- EGR Flow Excessive Detected. P245B \- EGR Cooler Bypass Control Circuit Performance. P20C6 \- Reductant Heater 4 Control Circuit Performance. P208B \- Reductant Pump 1 Control Performance. P249C \- Excessive Time To Enter Closed Loop Reductant Injection Control. P20E8\-00 \- Reductant Pressure Too Low. P20E9\-00 \- Reductant Pressure Too High. The following software enhancement is available:Some vehicles may have experienced a slight engine hesitation or lag in acceleration from engine start\-up until the engine and exhaust warmed up. This update is intended to reduce the hesitation or lag in acceleration from engine start\-up. In addition, the following software enhancement is also available:Ability to enable the ?Fuel System Cleaning? routine in wiTECH.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10181621-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10181621-9999.pdf)

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

## Components

Transmission and driveline

## Trouble codes named

P0133, P0299, P0401, P0402, P050E, P1D30, P208B, P20C6, P20E8, P20E9, P20EE, P2453, P245B, P249C

## Vehicles listed

- 2017 RAM 1500

## Recalls for the same vehicles and component

- [2018081](/recalls/tc/2018081.md), 2018-02-08: Powertrain
- [18V100000](/recalls/nhtsa/18V100000.md), 2018-02-08: POWER TRAIN:AUTOMATIC TRANSMISSION
- [2017659](/recalls/tc/2017659.md), 2017-12-21: Powertrain
- [17V821000](/recalls/nhtsa/17V821000.md), 2017-12-20: POWER TRAIN:AUTOMATIC TRANSMISSION:LEVER AND LINKAGE:COLUMN SHIFT
- [2017167](/recalls/tc/2017167.md), 2017-03-23: Powertrain
- [17V198000](/recalls/nhtsa/17V198000.md), 2017-03-23: POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT

## Other bulletins for the same vehicles and component

- [S2621000003 REV.A](/bulletins/11030138.md), 2026-03-18, Service bulletin: POWER TRAIN. The vehicle will exhibit a service transmission/check engine warning indicator for the following transmission models: 845RE, 8HP45, 850RE, 8HP50, 8HP70, 8HP75, 8HP75\-PHEV, 8HP75\-LCV, 8HP90, 8HP95. Transmissions may exhibit the following diagnostic codes: P07E4, P1DB2, P0716, P1B14, P0733, P1D90, P1DB7, P1B13.
- [101232](/bulletins/11010205.md), 2024-11-07, Service bulletin: POWER TRAIN. Plate \- Planetary
- [S1623000028 Rev.](/bulletins/10231735.md), 2023-02-13, Service bulletin: VEHICLE SPEED CONTROL; BACK OVER PREVENTION; POWER TRAIN; VISIBILITY; PARKING BRAKE. Outside Power Fold Rearview Mirror Noise Or Loose At Pivot. Mirror Contacts Door Window Glass In The Folded Position.
- [9003704](/bulletins/10229255.md), 2023-01-09, Service bulletin: ENGINE AND ENGINE COOLING; POWER TRAIN. Transmission Oil Pan, Heater \(TMU\), Tube or O\-ring Applies to vehicles equipped with 8 speed transmissions only; if you have a leak that appears to be at the pan the use of proper leak detection is recommended. The fluid in the 8 speeds can be detected with a black light and there are aftermarket spray on leak detection materials to help ensure that the leak is properly diagnosed and not from another location such as cooler lines, heater tubes, or case porosity. Please note that the transmission pan gasket is available for many of the 8 speed applications FCA offers. Please review the available quick connect and transfer tube parts, as replacement of the TMU may not be required. If a TOC line connection is found to be the source, the quick connect may need replacement. If the leak source is coming from the connection of the TMU to the transmission, the transfer tube may need replacement. When parts are returned to the QEC the retaining clips \(snap ring\) for the quick disconnect fittings are missing. \(This leaves a question as to whether the clips were missing from the assembly plant, or the technician removed them in order to make line removal easier.\) Please return the clips with the transmission heater and note if they were not there to begin with. For any questions regarding transmission heater, contact FCA Redacted Content. If no response in 15 minutes, proceed with repair.
- [9003704](/bulletins/10224898.md), 2022-10-31, Service bulletin: POWER TRAIN; ENGINE AND ENGINE COOLING. Trans Oil Pan, Heater Tube or O\-ring, Heater Applies to vehicles equipped with 8 speed transmissions only; If you have a leak that appears to be at the pan the use of proper leak detection is recommended. The fluid in the 8 speeds can be detected with a black light and there are aftermarket spray on leak detection materials to help ensure that the leak is properly diagnosed and not from another location such as cooler lines, heater tubes, or case porosity. If you have a leak concern please note that the transmission pan gasket is available for many of the 8 speed applications FCA offers. See your parts specialist for the proper gasket for the repair.
- [9003805](/bulletins/10224896.md), 2022-10-31, Service bulletin: WHEELS; EQUIPMENT; POWER TRAIN. Hub \& Bearing Assy \- Front For issues with front wheel Hub/Bearings appearing to leak grease, do not replace the parts. Please call Paul Kuehl for further assistance, at cell \(248\) 535\-7013. If no response in 15minutes, proceed with repair, but do not replace bearing\(s\) unless there is visible damage, see Service Manual Diagnostic Procedure which includes a picture of typical bearing grease weepage.
- [9003794](/bulletins/10224883.md), 2022-10-31, Service bulletin: POWER TRAIN. Friction Modifier If you have a vehicle with customer complaint of Limited Slip Differential chatter or shudder, please do NOT add friction modifier to the axle, replace the axle, and contact Ashley Gerebics at cell: \(248\) 472\-6524 to have the axle fast tracked back to FCA. If no response in 15 minutes, proceed with repair.
- [2103817](/bulletins/10224749.md), 2022-10-24, Service bulletin: BACK OVER PREVENTION; SUSPENSION; WHEELS; POWER TRAIN. Tighten Transmission Extension Housing Bolts This bulletin involves tightening the fasteners extension housing bolts to propertorque. Some customers may experience noise and vibration in vehicle. This is due to improperly torqued transmission extension housing attachmentbolts.
- [S1908000102](/bulletins/10224022.md), 2022-10-17, Service bulletin: POWER TRAIN. \(Rev. A\) Power Inverter Load Ratings
- [2101317](/bulletins/10223668.md), 2022-10-17, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). This bulletin involves reprogramming the Transmission Control Module \(TCM\) with the latest available software. Some customers may experience a less than desirable shift quality or the vehicle stuck in a fixed gear during a limp in mode.

JSON: [/v1/bulletins/10181621](/v1/bulletins/10181621)

[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%2018-068-20%20REV.%20B&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10181621&vehicle=Service%20bulletin%2018-068-20%20REV.%20B)