NUMBER:
GROUP:
DATE:

18-055-22
18 - Vehicle Performance
March 18, 2022

This bulletin is supplied as technical information only and is not an authorization for repair. No part of this publication may be reproduced, stored in a retrieval system, or
transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise, without written permission of FCA US LLC.

This bulletin supersedes Technical Service Bulletin (TSB) 18-015-21 REV. A, date of issue
August 12, 2021, which should be removed from your files. All revisions are highlighted with
**asterisks** and include additional Diagnostic Trouble Codes (DTCs), symptom/conditions
and LOP.
NOTE: Symptoms/Conditions that are related to this Technical Service Bulletin (TSB) are
included within the W57 Recall. Please perform the W57 recall if the vehicle is on the
W57 recall VIN list, for all other vehicles perform the Repair Procedure below.
SUBJECT:
Flash: Powertrain Control Module (PCM) Updates
OVERVIEW:
This bulletin involves reprogramming the Engine Control Module (ECM) / Powertrain Control Module
(PCM) with the latest available software.
MODELS:
2020
2020

(DD)
(DP)

RAM 3500 Cab Chassis
RAM 4500/5500 Cab Chassis

NOTE: This bulletin applies to vehicles within the following markets/countries: North
America.
NOTE: This bulletin applies to vehicles equipped with a 6.7L I6 Cummins Turbo Diesel
Engine (Sales Code ETN).
SYMPTOM/CONDITION:
Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further
investigation the technician may find that one or more of the following Diagnostic Trouble Codes
(DTCs) have been set:
• **P0506-00-Idle Control System Rpm - Lower Than Expected.
• P0088 - Fuel Rail Pressure Too High - Bank 1 (Sym Cam Only)**
• P0607-00 - ECU Internal Performance.
• P20E8-00 - Reductant Pressure Too Low.
• P0301-00 - Cylinder 1 Misfire (Sym Cam Pump Only).
• P0302-00 - Cylinder 2 Misfire (Sym Cam Pump Only).
• P0303-00 - Cylinder 3 Misfire (Sym Cam Pump Only).
• P0304-00 - Cylinder 4 Misfire (Sym Cam Pump Only).
• P0305-00 - Cylinder 5 Misfire (Sym Cam Pump Only).
• P0306-00 - Cylinder 6 Misfire (Sym Cam Pump Only).
• P1C54-00 - SCR NOx Catalyst Missing.
• P242F-00 - Diesel Particulate Filter Restriction - Ash Accumulation (68RFE Only).
• P2463-00 - Diesel Particulate Filter Restriction - Soot Accumulation Bank 1 (68RFE Only).
• P1451-00 - Diesel Particulate Filter System Performance (68RFE Only).

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P0299-00 - Turbocharger Underboost.
P2706-00 - MS Solenoid Circuit (68RFE Only).
P1D73-00 - AGS Performance.
P061B - Internal Control Module Torque Calculation Performance.
P064B-00 - PTO Control Module.

The customer may also notice the following:
• **PTO Customers: Allows E-Stop to work in any gear.
• PTO customers that use remote start: Prevents PTO cancellation in cab from disabling remote
start.**
• Harsh downshift clunk during exhaust brake deceleration.
• DEF gauge erratic when DEF level is low.
• Stall when putting in reverse in cold ambient temps.
• Engine stumble during engine warm up.
• Unstable idle when AC compressor cycles.
• Power Take Off (PTO) intermittently turns off with no DTCs.
In addition the following software enhancements are included:
• Engine oil pressure switch modification.
• Oil Change Monitor Improvements For Severe Duty Operation.
• System Improvement for PTO operation.
• wiTECH Mass Air Flow (MAF) data parameter improvement.
• Enabling wiTECH Particulate Matter (PM) Sensor Regeneration Test in PCM “Misc Functions”.
• Active Grille Shutter (AGS) quality enhancements.
DIAGNOSIS:
Using a Scan Tool (wiTECH) with the appropriate Diagnostic Procedures available in
DealerCONNECT/Service Library, verify all related systems are functioning as designed. If DTCs or
symptom conditions, other than the ones listed above are present, record the issues on the repair
order and repair as necessary before proceeding further with this bulletin.
If the customer describes the symptom/conditions listed above or if the technician finds the DTCs,
perform the Inspection Procedure.
INSPECTION:
NOTE: You may be presented with two calibration choices when flashing the ECM. Please
follow the inspection steps in this service bulletin closely to avoid choosing the
incorrect calibration. Choosing the incorrect calibration will result in an undesirable
noise from the High Pressure Fuel Pump, requiring the ECM to be flashed again
with the correct calibration.
The fuel injection pump must be inspected to determine which design pump is installed on the
vehicle. Older design pumps have an Asymmetrical design internal cam. The newer design pumps
have a Symmetrical design internal cam. The design of the pump will determine which calibration
will need to be programmed into the ECM. From outward appearance both pumps look identical,
with the exception of specific identification marks machined into the body of the pump.

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18-055-22

1. Inspect the fuel injection pump to see which pump the vehicle has:
• Vehicles with the new style Symmetrical Cam design pump will have one large single dot
embossed in the pump housing (Fig. 1) .
• For vehicles equipped with a Symmetrical Cam pump, choose the calibration labeled
Symmetric Cam, or Sym Cam.

Fig. 1
New Style Symmetrical Cam Design Pump
1 - One large Single Dot on Housing.

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• Vehicles with the old style Asymmetrical Cam design will have multiple small dots or no dots
embossed in the pump housing (Fig. 2) .
• For vehicles with an Asymmetrical Cam pump, choose the calibration labeled Asymmetric
Cam or Asym Cam.

Fig. 2
Old Style Asymmetrical Cam Design Pump
1 - Multiple Small Dots or No Dots Embossed In The Pump Housing.

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18-055-22

REPAIR PROCEDURE:
NOTE: Install a battery charger to ensure battery voltage does not drop below 13.2 volts. Do
not allow the charging voltage to climb above 13.5 volts during the flash process.
NOTE: If this flash process is interrupted/aborted, the flash should be restarted.
1. Reprogram the PCM/ECM with the latest software. Detailed instructions for flashing control
modules using the wiTECH Diagnostic Application are available by selecting the application’s
“HELP” tab.
2. Clear all DTCs that may have been set in any module due to reprogramming. The wiTECH
application will automatically present all DTCs after the flash and allow them to be cleared.
3. Using wiTECH, perform the 9Oil Life Restore9 procedure located in the ECM 9Misc Functions”.
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation
No:
**18-19-04-NE

Description

Skill Category

Amount

Module, Engine Control (ECM) Reprogram
(Aisin Transmission)
(0 - Introduction)

10 - Diesel

0.4 Hrs.**

NOTE: The expected completion time for the flash download portion of this procedure is
approximately 10 minutes. Actual flash download times may be affected by vehicle
connection and network capabilities.
FAILURE CODE:
The dealer must use failure code CC with this Technical Service Bulletin.
• If the customer’s concern matches the SYMPTOM/CONDITION identified in the Technical
Service Bulletin, failure code CC is to be used.
• When utilizing this failure code, the 3C’s (customer’s concern, cause and correction) must be
provided for processing Technical Service Bulletin flash/reprogramming conditions.
CC

Customer Concern