P1421 NISSAN - Cold Start Control

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

P1421 NISSAN 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

First diagnose P1421 NISSAN code

    Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.

P1421 NISSAN 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





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Cost of diagnosing the P1421 NISSAN code

    Labor: 1.0

    The cost of diagnosing the P1421 NISSAN code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

When is the P1421 NISSAN 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.

P1421 NISSAN Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1421 NISSAN Meaning

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 - Engine-Codes.com

P1421 NISSAN More Information

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