25-002-13

NUMBER:
25-002-13
GROUP:
Emissions Control
DATE:
February 28, 2013
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 Chrysler LLC.
SUBJECT:
MIL Illumination Due To P1C56 - NOx Sensor Intermittent - Bank 1 Sensor 2
OVERVIEW:
This bulletin involves verifying excessive Diesel Exhaust Fluid (DEF) deposits in the
decomposition tube collected and if present, replacing the Catalytic Converter Shield with
a “clam shell” shield with a metal exterior.
This repair is to be performed in addition to diagnostics available in DEALERCONNECT >
Service > Repair Information > TechCONNECT > 28 - DTC-Based Diagnostics >
MODULE, Powertrain Control (PCM), DD/DP - Chassis Cab > Diagnosis and Testing >
P1C56 - NOx SENSOR INTERMITTENT - BANK 1 SENSOR 2
MODELS:
2011
DD
Ram Truck 3500 Cab Chassis
2011
DP
Ram Truck 4500/5500 Cab Chassis
NOTE: This bulletin applies to vehicles equipped with a 6.7L Cummins diesel engine
(sales code ETJ).
SYMPTOM/CONDITION:
Customer may experience MIL illumination. Further investigation by the technician may
find P1C56 - NOx Sensor Intermittent - Bank 1 Sensor 2 is set active or stored.
This condition may be caused by insufficient heat retention in the exhaust at or near the
DEF doser.
DISCUSSION:
Complete a Diesel Diagnostic Worksheet per instructions in Service Bulletin 18-045-11
Dated October 19, 2011 and U. S. Warranty Bulletin D-11-55 Dated October, 2011. All
DTC's need to be recorded on the WRO and DTC's other than the ones listed above may
require additional diagnosis and repair after completing this Bulletin.
When diagnosing and repairing 2011 MY trucks with a blanket type catalytic converter
shield, please replace shield with p/n 68086554AB after completing diagnostics and
repairing any concerns.
25-002-13
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PARTS REQUIRED:
Qty.
Part No.
Description
1
68086554AB
Shield, Exhaust, Catalytic Converter
POLICY:
Information Only