For Shop Owners

P1421 NISSAN - Cold Start Control

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3 What does this mean?

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)
  • Reprogram ECM
What does this mean?

Tech notes

There is a factory service bulletin for the following Nissan models:

2007-2009 Nissan Versa


2009-2010 Nissan CUBE






User Submitted Video
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 the engine is started with pre-warming up condition. This control promotes the activation of three-way catalyst by heating the catalyst and reduces emissions.
OBDII Code P1421 Nissan - Cold Start Control - itimaster.ru

P1421 NISSAN Information for specific Nissan models

Need more help?

Do you need more help with the P1421 Nissan code? Ask a question to our users or find an automotive repair shop near you to help fix the OBDII code

P1421 NISSAN Comments

Help us improve itimaster.ru. Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P1421 Nissan code? Have you replaced any parts?
Any information is appreciated. Thanks
Repair Importance Level: 3
1=Low 2=Medium 3=High
Repair Difficulty Level: 2
1=Easy 2=Moderate 3=Hard

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