AutoCodes – Nissan – P1421 2008 Nissan Rogue

P1421 2008 Nissan Rogue Code - Cold Start Control

Quick Answer

The Engine Control Module (ECM) controls ignition timing and engine idle speed when the engine is started with pre-warming up condition. Common causes include Lack of intake air volume (block air filter), Fuel injection system (Clogged fuel injector or bad fuel pump), Faulty Engine Control Module (ECM). Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1421 2008 Nissan Rogue indicates Cold Start Control.
Common causes: Common causes include Lack of intake air volume (block air filter), Fuel injection system (Clogged fuel injector or bad fuel pump), Faulty Engine Control Module (ECM).
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 4,093

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Oct 07, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1421 2008 Nissan Rogue 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. The Diagnostic Trouble Code (DTC) will be set when the ECM does not control ignition timing and engine speed properly when the engine is started with prewarming up condition.

OBDII Code P1421 2008 Nissan Rogue - Cold Start Control - AutoCodes.com — P1421 2008 Nissan Rogue Code - Cold Start Control

What does this mean?

What are the Possible Causes of the DTC P1421 2008 Nissan Rogue?

Lack of intake air volume (block air filter)
Fuel injection system (Clogged fuel injector or bad fuel pump)
Faulty Engine Control Module (ECM)

How to Fix the DTC P1421 2008 Nissan Rogue?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1421 2008 Nissan Rogue code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1421 2008 Nissan Rogue code?

Need more information on how to fix the P1421 2008 Nissan Rogue code? Get Access to Factory Service Manuals

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1421 2008 Nissan Rogue Code

What does OBDII code P1421 mean for a 2008 Nissan Rogue?

OBDII code P1421 indicates a problem with the cold start control system, which is responsible for optimizing the engine's performance during cold starts.

What are the common symptoms of code P1421 in a 2008 Nissan Rogue?

Symptoms may include rough idling, poor fuel economy, increased emissions, and difficulty starting the engine, especially in cold weather.

What could cause the P1421 code to trigger in a 2008 Nissan Rogue?

Common causes include a malfunctioning cold start control valve, issues with the intake air temperature sensor, or problems in the engine control module (ECM).

How can I diagnose the P1421 code on my 2008 Nissan Rogue?

To diagnose P1421, use an OBD-II scanner to read the code, inspect wiring and connectors related to the cold start control system, and check the operation of the cold start control valve and associated sensors.

Is it safe to drive a 2008 Nissan Rogue with the P1421 code?

While it may be safe to drive, the vehicle may experience poor performance and increased emissions. It is advisable to address the issue to prevent further damage.

What are some repair tips for fixing code P1421 in a 2008 Nissan Rogue?

Consider cleaning or replacing the cold start control valve, checking electrical connections for wear or corrosion, and testing the intake air temperature sensor for proper function.

Can I clear the P1421 code after repairs?

Yes, after addressing the underlying issue, you can clear the code using an OBD-II scanner. If the problem is resolved, the code should not reappear.

Will ignoring the P1421 code cause further damage to my 2008 Nissan Rogue?

Yes, neglecting to address the P1421 code could lead to more severe engine performance issues and increased wear on components, potentially resulting in costly repairs.

How much does it typically cost to repair the P1421 code in a 2008 Nissan Rogue?

Repair costs can vary widely, but fixing the cold start control system issues can range from $100 to $600, depending on the specific parts that need to be replaced or repaired.