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Service bulletin JTB-00241-NAS1

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10042910
Published by NHTSA2012-01-25
Manufacturer's numberJTB-00241-NAS1
Manufacturer's date2011-10-25
NHTSA componentENGINE AND ENGINE COOLING; FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS

NHTSA's summary

JAGUAR: ON SOME VEHICLES, THE ENGINE IS MALFUNCTIONING BY EXHIBITING HARD STARTING, POOR FUEL ECONOMY, MISFIRE, AND/OR A ROUGH IDLE CONDITION. FUEL CONTAMINATION OR POOR FUEL QUALITY LEADS TO CLOGGED FUEL INJECTORS AND RESTRICTING FUEL INJECTOR FLOW. *PE

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Engine, Fuel system, Fuel injection

Vehicles listed
JAGUAR XF2010, 2011, 2012
JAGUAR XJ2010, 2011
JAGUAR XK2010, 2011

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
SSM72865 Attachm2018-01-29. Service bulletin. Issue: Diesel exhaust fluid (DEF) injector crystallization leading to incorrect and unnecessary replacement.
SSM728652018-01-29. Service bulletin. Issue: Diesel exhaust fluid (DEF) injector crystallization leading to incorrect and unnecessary replacement.
SSM392112017-04-07. Service bulletin. "RE-ISSUED DEC 2015. ISSUE: FUEL INJECTORS CLOGGED LEADING TO POOR RUNNING / MISFIRES / ENGINE DETONATION ON AJ-V8 ENGINES. CAUSE: POOR FUEL QUALITY OR FUEL CONTAMINANTS BLOCKING THE HOLES IN THE FUEL INJECTOR."
SSM-636972016-09-02. Service bulletin. "REPUBLISHED AUGUST 2013. ISSUE: FUEL INJECTOR CONCERNS, (APPLICABLE TO 5.0 AJ133 GASOLINE ENGINES), LEADING TO POTENTIAL PROBLEMS SUCH AS POOR RUNNING, POOR FUEL ECONOMY, HARD STARTING, ROUGH IDLE, MISFIRES AND ENGINE DETONATION. CUSTOMER SYMPTOMS MAY INCLUDE THE ENGINE CHECK LAMP ILLUMINATED WHICH MAYBE ACCOMPANIED WITH A MISFIRE/ENGINE VIBRATION AT IDLE. MISFIRE CODES (P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, P0316) ARE STORED IN THE PCM DEPENDENT ON THE AFFECTED CYLINDER(S). CAUSE: POOR FUEL QUALITY OR FUEL CONTAMINANTS RESTRICTING THE FUEL INJECTOR FLOW RATE."
SSM-636972013-04-17. Service bulletin. JAGUAR: FUEL INJECTOR CONCERNS 5.O AJ133 GASOLINE, LEADING TO POTENTIAL PROBLEMSSUCH AS POOR RUNNING POOR FUEL ECONOMY, HARD STARTING, ROUGH IDLE, MISFIRES AND ENGINE DETONATION. *JS