Traditional gasoline car fault

1998 Subaru Legacy Postal P0400 EGR Code: Diagnosis and Solutions for Persistent Check Engine Light

Hi everyone, I'm looking for help with a persistent P0400 EGR code on my 1998 Subaru Legacy Postal. The car has around 177,000 miles and was purchased third-hand, so it's been t...

1998 Subaru Legacy | P0400

1997 Nissan Altima P0400 Code: EGR Flow Malfunction Fix and Safe Driving Advice

Hello everyone, I'm looking for some advice regarding a persistent P0400 code on my 1997 Nissan Altima. After completing basic diagnostics, I found that the exhaust gas recircul...

Nissan Altima | P0400

P0400 Diagnostic and Repair for 1997 Mazda Protege (260k Miles)

I'm working on my grandmother's 1997 Mazda Protege, which has accumulated 260,000 miles. I've recently replaced both oxygen sensors (original units), the EGR valve, and spark pl...

Mazda Protege | P0400

2001 Buick LeSabre 3.8L V6 Repeated P1404 EGR Code After Four Valve Replacements - Diagnosis & Bench Testing Options

I own a 2001 Buick LeSabre with a 3.8L V6 engine. The vehicle has been consistently triggering the P1404 diagnostic trouble code (DTC), which indicates a pintle valve stuck open...

Unknown | P0400

1997 Infiniti J30 P0325, P0400, P0443 - Emission Failure After Fuel Pump Replacement

My 1997 Infiniti J30 has been failing emissions tests even after clearing the check engine light codes. My stepfather recently replaced the fuel pump using a DIY tool, but now t...

1997 Infiniti J30 | P0325

P0420, P0400 and P0303 on 1999 Mistubishi Gallant ES

The Mitsubishi Gallant ES has 262,000 miles on it. Been getting the P0420 catalyst efficiency below threshold for about a year, year and a half. I know that's due to burning o...

1999 Mitsubishi Galant ES | P0303

1998 Toyota Sonoma P0404 EGR Fault: Symptoms, Diagnosis & Fixes

Hi everyone! I own a 1998 Toyota Sonoma with a 2.2L engine and 5-speed manual transmission. I've recently been experiencing a persistent P0404 diagnostic trouble code, which in...

1998 Sonoma | P0400

Where Is the EGR Valve on a 1998 Pontiac Grand Am 2.4L Engine?

Can anyone provide information about the location of the EGR valve on a 1998 Pontiac Grand Am equipped with a 2.4-liter engine? I'm trying to locate it for maintenance or repair...

PONTIAC 2.4 LITRE | P0400

Ford Ranger Edge Misfires and Air Leak Diagnosis: P0171, P0174, P0300, P0303, P0305, P0455 Solutions

I'm currently experiencing multiple OBD2 fault codes on my Ford Ranger Edge: P0171, P0174, P0300, P0303, P0305, and P0455. I've already replaced the spark plugs and oxygen senso...

Ford Ranger Edge | P0300

1996 Toyota Tercel EGR Flow Insufficient - No EGR Temperature Sensor?

I've thoroughly checked all possible components and everything appears to be functioning correctly. However, I'm unable to locate a repair manual that addresses this specific is...

96 Tercel | P0400

1996 Nissan Maxima P0400 Fault: Could Exhaust Leak or EGR Valve Cause It?

I own a 1996 Nissan Maxima with approximately 205,000 miles. The check engine light is illuminated, and my OBD-II scanner shows the following diagnostic trouble codes: - P0400: ...

1996 Maxima | P0400

1999 Mazda 626 V6 Missfire Diagnosis: Codes P0400, P1131, P0174 - EGR, Intake Gasket, or Injector Issues?

My 1999 Mazda 626 V6 is experiencing a severe missfire on cylinders #2 and #6. After testing with four different diagnostic scanners, I received codes P0400 (Exhaust Pressure Se...

1999 Mazda 626 | P0174

97 mazda protege....P1195 and P0400

This is on a 97 Mazda Protege SE, 5sp, 1.5L. I have 2 codes, P1195 and P0400. I have had the P0400 for a little while (it comes and goes for some reason), but just today i put ...

97 mazda protege | P0400

2001 Jetta P0100 and P0400 Diagnostic Trouble Codes: Causes and Fixes

We own a 2001 Volkswagen Jetta (4-cylinder, automatic transmission) that is displaying two stored diagnostic trouble codes during an OBD-II scan: - TC1: P0100 - Mass or Volume ...

2001 Jetta | P0100

1996 Subaru Outback P0130, P0400, P0740: Fixing O2 Sensor, EGR Flow and TCC Malfunctions Without Full Sensor Replacement

I own a 1996 Subaru Legacy Outback with a 2.5L engine and automatic transmission, currently at 164,000 miles. The vehicle experiences a severe hard shift from 1st to 2nd gear an...

1996 Subaru OBII | P0130

P0400 Fault Diagnosis: 2000 Nissan Maxima EGR System and Carbon Buildup Issues

I recently performed a quick diagnostic scan on a 2000 Nissan Maxima before leaving today. The vehicle is showing a P0400 code, which indicates an issue with the Exhaust Gas Rec...

2000 Nissan Maxima | P0400

P0400 Code on 2000 Nissan Frontier 2.4L: Diagnosis and Fixes for EGR Flow Issues

I'm experiencing a P0400 diagnostic trouble code on my 2000 Nissan Frontier with a 2.4L engine, which has only 40,000 miles on it. The vehicle is showing no exhaust gas recircul...

nissan frontier 2.4 lt | P0400

1999 Nissan Maxima P0325 and P0400 Fault Codes: Cost Discrepancy Between Service Station and Dealer

I own a 1999 Nissan Maxima with 79,000 miles, an automatic transmission, and a six-cylinder engine. The 'Service Engine Soon' light has activated, and since I'm not technically ...

99 Nissan Maxima | P0325