AutoCodes - Nissan - P0400 2001 NISSAN ALTIMA SEDAN

P0400 2001 NISSAN ALTIMA SEDAN Code - Exhaust Gas Recirculation Function No/Low Flow Detected

Repair Importance Level: 2/3
Repair Difficulty Level: 2/3
Table of contents

|P0400 2001 NISSAN ALTIMA SEDAN code possible causes

  • Exhaust Gas Recirculation (EGR) volume control valve stuck closed
  • Faulty Exhaust Gas Recirculation (EGR) volume control solenoid valve
  • Faulty EGR Valve
  • Faulty EGR temperature sensor and circuit
  • Exhaust Gas Recirculation (EGR) solenoid valve harness is open or shorted
  • Exhaust Gas Recirculation (EGR) solenoid valve circuit poor electrical connection
  • Dead (Weak) battery

|How do I fix the P0400 2001 NISSAN ALTIMA SEDAN 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 connector's pins.

|P0400 2001 NISSAN ALTIMA SEDAN code tech notes

The most likely cause of this problem is a clogged EGR valve or EGR flow passages. Before replacing any parts, try cleaning the EGR valve, tube, and passages with throttle body or carburetor cleaner. Also, check for damage or loose vacuum hoses to the EGR valve.





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|Cost of diagnosing the P0400 2001 NISSAN ALTIMA SEDAN code

Labor: 1.0

The cost of diagnosing the P0400 2001 NISSAN ALTIMA SEDAN code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|When is the P0400 2001 NISSAN ALTIMA SEDAN code detected?

Exhaust Gas Recirculation (EGR) flow control is not responding

|What are P0400 2001 NISSAN ALTIMA SEDAN code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Possible engine hesitation

|P0400 2001 NISSAN ALTIMA SEDAN code description

Early Exhaust Gas Recirculation (EGR) systems component s include and EGR Valve, and Engine Control Μodule (ECΜ) Controlled Vacuum Switch Valve or EGR Solenoid and an EGR Vacuum Μodulator. Depending on the engine and driving conditions, the ECΜ will control the EGR Solenoid, which will operate the EGR Vacuum Μodulator to regulate the opening and closing of the EGR Valve.
OBDII Code P0400 2001 Nissan Altima Sedan - Exhaust Gas Recirculation Function No/Low Flow Detected - AutoCodes.com

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|P0400 2001 NISSAN ALTIMA SEDAN code comments

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