AutoCodes.com | All About OBDII Engine Codes
AutoCodes - Honda - P0401 1997 HONDA CIVIC

P0401 1997 HONDA CIVIC Code - Exhaust Gas Recirculation Insufficient Flow

- Code Popularity: 5,102 Views
- Repair Importance Level: 2/3
- Repair Difficulty Level: 2/3
Table of contents
By AutoCodes.com - Updated Jun 14, 2020
Share on Facebook   Share on Twitter   Share on Linkedin

|P0401 1997 HONDA CIVIC code possible causes

  • Exhaust Gas Recirculation Valve harness is open or shorted
  • Exhaust Gas Recirculation Valve circuit poor electrical connection
  • Faulty Exhaust Gas Recirculation Valve
  • Exhaust Gas Recirculation Valve clogged
  • Exhaust gas leaks

|How do I fix code P0401 1997 HONDA CIVIC 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.

Does your car have Safety Recalls? → Check here

|P0401 1997 HONDA CIVIC code tech notes

The EGR system tends to get clogged with carbon built up. You can try to clean the EGR valve and its tubing before replacing anything.

|Cost of diagnosing P0401 1997 HONDA CIVIC code

Labor: 1.0

The cost of diagnosing the P0401 1997 HONDA CIVIC 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 P0401 1997 HONDA CIVIC code detected?

Low EGR flow control is detected

|What are P0401 1997 HONDA CIVIC code possible symptoms?

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

|P0401 1997 HONDA CIVIC code description

The exhaust gas recirculation (EGR) system reduces oxides of nitrogen (NOx). NOx is generated by high combustion temperatures.
The EGR system lowers peak combustion temperature by recirculating inactive exhaust gas into the air/fuel mixture, thus reducing NOx emissions.
The EGR valve position sensor is built into the EGR valve and detects the amount of valve lift. The command value for the target valve lift is previously stored in the powertrain control module (PCM) so that exhaust gas recirculation can be optimized according to driving conditions.
Comparing this command value with the EGR valve position sensor output signal value, the PCM controls the EGR valve to make the amount of actual valve lift equal to the command value.
If the EGR valve position sensor output signal value differs greatly from the command value in the PCM memory for a set period of time, the EGR valve or the EGR valve position sensor is considered faulty and a DTC is stored.
OBDII Code p0401 1997 honda civic - Exhaust Gas Recirculation Insufficient Flow - AutoCodes.com
P0401 1997 HONDA CIVIC Code - Exhaust Gas Recirculation Insufficient Flow

|Need more information with the P0401 1997 HONDA CIVIC code?

Need more information on how to fix the P0401 1997 HONDA CIVIC code? Get Access to Factory Service Manuals

|Need help with a P0401 1997 HONDA CIVIC code?

Get the p0401 1997 honda civic code diagnosed by a professional: Find a repair shop in your area

|P0401 1997 HONDA CIVIC code comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the p0401 1997 honda civic code? Have you replaced any parts?
Any information is appreciated. Thanks