Technical Service Bulletin (TSB)
Flash: Powertrain Control Module (PCM) Updates
REFERENCE:

TSB: 18-020-26
GROUP: 18 - Vehicle Performance

Date:

February 14, 2026

VEHICLES
AFFECTED:

2021 (DT) RAM 1500 Pickup
This bulletin applies to vehicles equipped with a 3.6L V6 24V VVT
eTorque Engine Upg I (Sales Code ERG) **and 8-SPD Auto 850RE
Trans (Sales Code DFT)**.

REVISION: 18-016-23

MARKET APPLICABILITY:
NA

MEA

SA

IAP

EE

CH

NOTE: **This bulletin applies
to the North America,
Enlarged Europe, China,
India & Asia Pacific,
Middle East & Africa,
and South America
markets.**
CUSTOMER
SYMPTOM:

**Customers may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may
exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs):
● P0300-00 - Multiple Cylinder Misfire - in Active or Stored status set during cold start catalyst heating.
● P0301-00 - Cylinder 1 Misfire - in Active or Stored status set during cold start catalyst heating.
● P0302-00 - Cylinder 2 Misfire - in Active or Stored status set during cold start catalyst heating.
● P0303-00 - Cylinder 3 Misfire - in Active or Stored status set during cold start catalyst heating.
● P0304-00 - Cylinder 4 Misfire - in Active or Stored status set during cold start catalyst heating.
● P0305-00 - Cylinder 5 Misfire - in Active or Stored status set during cold start catalyst heating.
● P0306-00 - Cylinder 6 Misfire - in Active or Stored status set during cold start catalyst heating.**
● P0335 - Crankshaft Position Sensor Circuit.
● P0339 - Crankshaft Position Sensor Intermittent.
**Customers may comment on one or more of the following:
● Vehicle has a rough idle.
● Engine has a miss.
● Noisy valvetrain.**
Other software enhancement included with this update:
● Idle stability improvements during Electronic Stability Control (ESC) events.

CAUSE:

**PCM software**

This bulletin supersedes Technical Service Bulletin (TSB) 18-016-23, date of issue February 03, 2023,
which should be removed from your files. All revisions are highlighted with **asterisks** and include
new Customer Symptoms, DTCs, Sales Code, updated Customer Symptom statement, new Market
Applicability note, new Cause, Repair Summary, Claims Data and Special Tools sections, updated LOP
number, Repair Procedure and new Repair Procedure notes.
**REPAIR SUMMARY:
This bulletin involves reprogramming the PCM with the latest available software.**

**CLAIMS DATA:

Labor Operation No:
**18-19-06-CC

Failure Code

Labor Description
Module, Powertrain
Control (PCM) Reprogram
(0 - Introduction)
CC

Skill Category
1 - Engine Repair And
Performance

Labor Time
0.3 Hrs.

Customer Concern

The dealer must use failure code CC with this Technical Service Bulletin.
● If the customer’s concern matches the SYMPTOM 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.**
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 any of the symptoms listed above in the customer symptom section, perform the
Repair Procedure.
**SPECIAL TOOLS/EQUIPMENT:

Description
wiTECH or Equivalent

Ref. No.
–

Notes
–**

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 with the latest available software. **If issues arise when flashing a module using the
wiTECH Diagnostic Application, please submit a ticket to the helpdesk. The helpdesk can be found within
the Help menu.**
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.
NOTE: **For SA market only, after applying this TSB, it is not necessary to send DID-I or DID-A.**
POLICY:
Reimbursable within the provisions of the warranty.
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.