Traditional gasoline car fault

P0401 and P0402 EGR Flow Errors on 2002 Ford F-150 - Fix for Insufficient and Excessive Flow

I own a 2002 Ford F-150 with 54,000 miles. I recently replaced the EGR valve, but the vehicle is still showing two diagnostic trouble codes: P0401 (Insufficient EGR Flow) and P0...

EGR | P0401

P0402 Excessive EGR Flow Diagnosis and Fix for 1996 Toyota 4Runner 2.7L 4-Cylinder

Just had my 1996 Toyota 4Runner 2.7L 4-cylinder diagnosed at the dealership. They were professional and did not charge me to reset the P0402 code (Excessive EGR Flow). They ment...

1996 Toyota 4Runner 2.7 4 Cyl | P0402

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 Ford Explorer 5.0L Fault Codes P0401 and P0402: Causes and Solutions

My 1997 Ford Explorer with a 5.0L engine is showing both fault codes P0401 (Insufficient EGR Flow) and P0402 (Excessive EGR Flow). How can the same system produce two conflictin...

1997 Ford Explorer | P0401

99 Ford Ranger 2.5L P0402 Code: Excessive EGR Flow - Vacuum Pump Diaphragm Issue

My 1999 Ford Ranger 2.5L is showing a P0402 code indicating excessive EGR flow. I initially thought the issue was a sticking EGR valve, so I replaced it and cleared the code—thi...

99 Ford Ranger 2.5L | P0402

OBD2 Code P0402 on 2000 Ford Taurus: How to Diagnose EGR vs. DPFE Sensor

The OBD2 diagnostic code P0402 is triggered by the engine control module, indicating a potential issue with the Exhaust Gas Recirculation (EGR) system or the Diesel Particulate ...

2000 Taurus | P0402

P0402 Fault Code on Ford T-Bird: Excessive Gas Recirculation - Is It EGR or DPFE?

I recently encountered fault code P0402 on my Ford T-Bird, which indicates excessive gas recirculation. This code typically points to issues with the Exhaust Gas Recirculation (...

ford t-bird | P0402

P0402 Fault Code in 1995 Ford T-Bird: Diagnosis and EGR Location Guide

I'm experiencing a P0402 diagnostic trouble code on my 1995 Ford T-Bird. What should I check, and where is the EGR valve located? The P0402 code indicates a malfunction in the e...

95 T-Bird | P0402

2000 Ford Ranger 3.0L V6 Flex Fuel P0402 Code: EGR Flow Excessive Diagnosis and Fix

I recently replaced the DPFE (Differential Pressure Feedback Emission) sensor on my 2000 Ford Ranger 3.0L V6 flex-fuel engine about two months ago. The replacement cleared the P...

2000 Ford Ranger v6 3.0 flex | P0402

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

1995 Lincoln Continental P0133 and P0402 Codes: Are They Related?

I own a 1995 Lincoln Continental that is showing both P0133 and P0402 diagnostic trouble codes. After clearing the codes, they return shortly after. I'm wondering if these two c...

Lincoln Continental | P0133

2001 Ford Crown Victoria P0402 Code: EGR Excessive Flow - Diagnosis & Fix Guide

I own a 2001 Ford Crown Victoria LX (4.6L SOHC V8, single exhaust, 71,000 miles) and am currently experiencing a persistent 'Check Engine' light. The diagnostic trouble code rea...

2001 Crown Vic | P0402

P0402 and P0155 on 1999 Cougar

Hi, I am currently receiving both the P0402 (excessive flow in the EGR system) and P0155 (malfunction exists in heater circuit for oxygen sensor 1 in bank 2) along with manufact...

1999 Cougar | P0155

1998 Toyota Camry P0402 Code: EGR Valve Replacement Not Resolving Issue

Hi, I'm having trouble with my 1998 Toyota Camry that has been throwing up a P0402 diagnostic code. I've already cleaned the EGR valve and associated hoses and intake manifold—t...

Toyota Camry | P0402

2001 Ford Taurus PO401 and PO402 Codes: DPFE Sensor Location, EGR Cleaning, and Fix Options

Hi everyone, I'm working on my 2001 Ford Taurus with 49,000 miles, a 3.0L engine, and 12V system. The vehicle is showing persistent check engine light codes PO401 (Insufficient ...

2001 Ford Taurus | P0401