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P0400 1998 NISSAN ALTIMA SEDAN

P0400 1998 NISSAN ALTIMA SEDAN - Exhaust Gas Recirculation Function- No/Low Flow Detected

Repair Importance Level: 2/3
Repair Difficulty Level: 2/3   
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P0400 1998 NISSAN ALTIMA SEDAN 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

First diagnose P0400 1998 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 1998 NISSAN ALTIMA SEDAN Tech Notes

The P0400 code is very common with the Nissan Altima. The most likely caused 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.

Cost of diagnosing the P0400 1998 NISSAN ALTIMA SEDAN code

    Labor: 1.0

    The cost of diagnosing the P0400 1998 NISSAN ALTIMA SEDAN code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

When is the P0400 1998 NISSAN ALTIMA SEDAN code detected?

Exhaust Gas Recirculation (EGR) flow control is not responding

P0400 1998 NISSAN ALTIMA SEDAN Possible Symptoms

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

P0400 1998 Nissan Altima Sedan 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 1998 Nissan Altima Sedan - Exhaust Gas Recirculation Function- No/Low Flow Detected - AutoCodes.com

P0400 1998 NISSAN ALTIMA SEDAN More Information

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