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P1421 Nissan

P1421 Nissan - Cold Start Control

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P1421 Nissan Comments |  Add Comment
Possible causes
- Lack of intake air volume (block air filter)
- Fuel injection system (Clogged fuel injector or bad fuel pump)
- Faulty Engine Control Module (ECM)
Help with Possible causes What does this mean?
Tech notes
There is a factory service bulletin for the following Nissan models:

2007-2009 Nissan Versa
2007-2009 Nissan Versa Factory Service Bulletin OBDII Code P1421

2009-2010 Nissan CUBE
2009-2010 Nissan CUBE Factory Service Bulletin OBDII Code P1421

Help with Tech Notes What does this mean?
When is the code detected?
The P1421 code is detected when The Engine Control Module (ECM) does not control ignition timing and engine idle speed properly when engine is started with pre-warming up condition.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1421 Nissan Description

The Engine Control Module (ECM) controls ignition timing and engine idle speed when engine is started with pre-warming up condition. This control promotes the activation of three way catalyst by heating the catalyst and reduces emissions.

NISSAN Technical Service Bulletins for P1421 code
2009 NISSAN CUBE Engine And Engine Cooling:engine Details
2010 NISSAN CUBE Engine And Engine Cooling:engine Details
2009 NISSAN CUBE 061000 Engine And Engine Cooling:engine Details
2010 NISSAN CUBE 061000 Engine And Engine Cooling:engine Details
2009 NISSAN ARMADA Engine And Engine Cooling:engine Details
2009 NISSAN TITAN Engine And Engine Cooling:engine Details
2009 NISSAN ARMADA 061000 Engine And Engine Cooling:engine Details
2009 NISSAN TITAN 061000 Engine And Engine Cooling:engine Details
Help with Technical Service Bulletins What does this mean?
P1421 Nissan Information for specific Nissan models
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