NUMBER:
GROUP:
DATE:

18-048-20 REV. A
18 - Vehicle Performance
August 7, 2020

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 Service Bulletin 18-048-20, dated May 23, 2020, which should be
removed from your files. All revisions are highlighted with **asterisks** and include
additional vehicle, engine, Diagnostic Trouble Codes (DTCs), symptom/conditions, inspection
and LOP.
SUBJECT:
Flash: Powertrain Control Module (PCM) Updates
OVERVIEW:
This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module (ECM/
PCM) with the latest available software.
MODELS:
**2020
2020

(DJ)
(D2)

RAM 2500 Pickup**
RAM 3500 Pickup

NOTE: This bulletin applies to vehicles within the following markets/countries: North
America.
NOTE: This bulletin applies to vehicles built on or before July 27, 2020 (MDH 0727XX)
equipped with a **6.7L I6 Cummins Turbo Diesel Engine (Sales Code ETL)** or a
6.7L I6 Cummins HO Turbo Diesel Engine (Sales Code ETM).
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:
• **P1D7300 - AGS Performance.
• P0299-00 - Turbocharger Underboost.
• P2463-00 - Diesel Particulate Filter Restriction - Soot Accumulation Bank 1.
• P1451-00 - Diesel Particulate Filter System Performance.
• P242F-00 - Diesel Particulate Filter Restriction - Ash Accumulation.**
• P24A5-00 - EGR Cooler Bypass Bank 1 Control Stuck (Sales Code ETM).
• P20EE-00 - NOx Catalyst Efficiency Below Threshold (Sales Code ETM).
• P0420-00 - Catalyst System Efficiency Below Threshold Bank 1 (Sales Code ETM).
• P2002-00 - Diesel Particulate Filter Efficiency Below Threshold (Sales Code ETM).
• P0191-00 - Fuel Rail Pressure Sensor Circuit Performance (Sales Code ETM).
• P0461-00 - Fuel Level Sensor 1 Performance (Sales Code ETM).
• P0401-00 - EGR System Performance (Sales Code ETM).
• P208B-00 - Reductant Pump 1 Control Performance (Sales Code ETM).

18-048-20 REV. A

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The customer may also notice one or more of the following:
• **Engine surge felt while driving (Sales Code ETM).
• Idle Fluctuation.**
The
•
•
•
•

following improvements are also included in this update:
**wiTECH “Fuel Injector Cutoff Test” fix.
wiTECH Mass Air Flow (MAF) Sensor data display additional fix.
Enabling wiTECH Particulate Matter (PM) Sensor Regeneration Test in PCM “Misc Functions”.
Engine Warmup Protection Improvement to help promote better oil delivery to engine bearings
during cold starts.
• Hydrocarbon Desorption (HCD) Mode operational improvement. HCD mode resumes after key
cycle. **
• Engine stumble improvement, during engine warm up (Sales Code ETM).
• Smoke improvement during highway driving and lower altitudes (sea level) (Sales Code ETM).

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 Repair 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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18-048-20 REV. A

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 Symetric
Cam, or Sym Cam.

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

18-048-20 REV. A

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• Vehicles with the old syle Asymmetrical Cam design will have multiple dots embossed in the
pump housing (Fig. 2) .
• For vehicles with an Asymmetrical Cam pump, choose the calibration labeled Asymetric Cam or
Asym Cam.

Fig. 2
Old Style Asymmetrical Cam Design Pump
1 - Multiple Dots on Housing**

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18-048-20 REV. A

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. Is this vehicle equipped with the 68RFE automatic transmission?
• YES>>> Proceed to Step 3 of the repair procedure.
• NO>>> Proceed to Step 4 of the repair procedure.
3. Perform the transmission “Quicklearn” procedure. Follow the detailed service procedures
available in DealerCONNECT/Service Library, Service Info Section 08 - Electrical > 8E Electronic Control Modules > Module, Transmission Control > Standard Procedure >
Quicklearn.
4. 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.
5. 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:

Description

Skill Category

Amount

**18-19-04-KV

Module, Engine Control (ECM) Sym Cam Injection Pump Calibration - Inspect and Reprogram
(1 - Semi-Skilled)
Module, Engine Control (ECM) Asym Cam Injection Pump Calibration - Inspect and Reprogram
(1 - Semi-Skilled)

10 - Diesel

0.4 Hrs.

10 - Diesel

0.4 Hrs.**

18-19-04-KU

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 Service Bulletin.
• If the customer’s concern matches the SYMPTOM/CONDITION identified in the 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 Service Bulletin flash/reprogramming conditions.
CC

Customer Concern