Traditional gasoline car fault

1996 Nissan Sentra OBD P0500 and P0400 Codes: Causes, Fixes, and Smog Test Solutions

I'm facing two OBD-II diagnostic codes—P0500 and P0400—on my 1996 Nissan Sentra while preparing for an annual smog test. My mechanic claims only the dealership can fix these iss...

1996 nissan sentra | P0400

1999 Mazda 626 2.0L Engine Codes P0400 and P1507: EGR Flow & Idle Air Control Issues

I own a 1999 Mazda 626 with a 2.0-liter 4-cylinder engine and automatic transmission. The vehicle runs smoothly under normal conditions, but the check engine light has been on f...

99 Mazda 626 2.0 | P0400

1997 Mazda 626 ES (6-cylinder) with P0400 Code: Troubleshooting Before Replacing EGR

My check engine light is on, and an OBD2 scan has revealed code P0400. I'm wondering if there's anything I can try before replacing the EGR valve. The car runs fine under normal...

1997 Mazda 626 ES (6 cyl) | P0400

P0400 Fault Code on 1997 Mitsubishi Montero FWD: Diagnosis and EGR System Monitoring Methods

P0400 Hello everyone, I own a 1997 Mitsubishi Montero (front-wheel drive, 3.5L engine — not the Sport model) that has been displaying a P0400 diagnostic trouble code, indicating...

1997 Mitsubishi Montero | P0400