AutoCodes – Nissan – P1421 2007 Nissan Maxima

P1421 2007 Nissan Maxima 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 2007 Nissan Maxima 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 3,901

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 2007 Nissan Maxima 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 2007 Nissan Maxima - Cold Start Control - AutoCodes.com — P1421 2007 Nissan Maxima Code - Cold Start Control

What does this mean?

What are the Possible Causes of the DTC P1421 2007 Nissan Maxima?

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 2007 Nissan Maxima?

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 2007 Nissan Maxima 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 2007 Nissan Maxima code?

Need more information on how to fix the P1421 2007 Nissan Maxima 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 2007 Nissan Maxima Code

1. What does OBDII code P1421 on a 2007 Nissan Maxima indicate?

- OBDII code P1421 on a 2007 Nissan Maxima relates to the Cold Start Control system malfunction.

2. What are the common symptoms of a P1421 code in a 2007 Nissan Maxima?

- Common symptoms of a P1421 code in a 2007 Nissan Maxima may include rough idling, stalling, or difficulty starting the vehicle.

3. What are the possible causes of a P1421 code on a 2007 Nissan Maxima?

- The P1421 code on a 2007 Nissan Maxima can be triggered by issues such as a faulty air pump, damaged hoses, or a malfunctioning air control valve.

4. How can I diagnose the source of a P1421 code on my 2007 Nissan Maxima?

- To diagnose a P1421 code on a 2007 Nissan Maxima, you may need to inspect the air pump, check for damaged hoses, and test the air control valve for proper operation.

5. Can a P1421 code on a 2007 Nissan Maxima be fixed without professional help?

- Depending on your automotive skills, fixing a P1421 code on a 2007 Nissan Maxima might be possible by replacing faulty components like the air pump or repairing damaged hoses.

6. Are there any simple repair tips for addressing a P1421 code on a 2007 Nissan Maxima?

- One simple repair tip for a P1421 code on a 2007 Nissan Maxima is to check and clean the air control valve to ensure proper functioning.

7. Is driving with a P1421 code illuminated on a 2007 Nissan Maxima safe?

- It is not recommended to drive a 2007 Nissan Maxima with a P1421 code illuminated, as it can lead to performance issues and potential damage to the engine.

8. How much does it typically cost to repair a P1421 code on a 2007 Nissan Maxima?

- The cost of repairing a P1421 code on a 2007 Nissan Maxima can vary depending on the specific issue, but it may range from $100 to $500 or more, including parts and labor.

9. Will resetting the OBDII system clear a P1421 code on a 2007 Nissan Maxima?

- Resetting the OBDII system may temporarily clear the P1421 code on a 2007 Nissan Maxima, but if the underlying issue is not fixed, the code is likely to reappear.

10. How urgent is it to address a P1421 code on a 2007 Nissan Maxima?

- It is important to address a P1421 code on a 2007 Nissan Maxima promptly to prevent further damage to the vehicle and ensure optimal performance.