Traditional gasoline car fault

1998 Dodge Dakota P0138 O2 Sensor Fault: Causes and Fixes for Exhaust Modifications

I own a 1998 Dodge Dakota 4x4 with a 318ci engine, currently at 180,000 miles. It has performed reliably over the years, except for transmission issues—though that is a separate...

1998 Dodge Dakota | P0138

2005 Dodge Stratus 2.7L 6-Cylinder P0133, P0138, and P2096 Codes: One Issue or Multiple Problems?

I own a 2005 Dodge Stratus with a 2.7-liter 6-cylinder engine. I'm currently experiencing three persistent OBD2 diagnostic codes: P0133 (O2 Sensor 1/1 Slow Response), P0138 (O2 ...

05 Stratus | P0133

1999 Nissan Sentra P0138 and P0325 Error Codes: How to Diagnose Without Replacing O2 or Knock Sensor

Hello! Just a day or two ago, the 'Service Engine Soon' light came on in my 1999 Nissan Sentra 2.0L engine. After taking it to a mechanic, I was given error codes P0138 and P032

1999 Nissan Sentra | P0138

2000 Jeep Grand Cherokee P0138 Check Engine Light: Diagnosis and ABS Code Issues

My 2000 Jeep Grand Cherokee with a 4.0L engine has the check engine light illuminated. I took it to AutoZone for an OBD2 scan, which returned code P0138. The technician also men...

2000 Jeep Grand Cherokee | P0138

1998 Dodge Ram 5.2L Engine P0138 O2 Sensor Code After Tune-Up: Causes and Diagnosis

I recently purchased a 1998 Dodge Ram with a 5.2L V8 engine two months ago. The truck was initially very underpowered and unresponsive, but the check engine light (MIL) was not ...

98 Dodge Ram | P0138

Dakota P0138 Code: Identifying the Sensor and Fixing Random Stalling and Backfiring

I'm experiencing a P0138 OBD2 diagnostic code on my Dakota. I want to know exactly which sensor is affected and whether this code is actually causing the issues I'm seeing. My t...

dakota | P0138

2004 Jeep Liberty Trail Rated - PO137 and PO138 OBD2 Codes Explained & How to Fix

I own a 2004 Jeep Liberty Trail Rated and recently noticed the check engine light came on. It would stay on for a while, then turn off, and later come back on intermittently. Af...

2004 JEEP LIBERTY TRAIL | P0137

P0138 and P0139 O2 Sensor Issues in Nissan Quest (174,000 Miles)

I have a 2015 Nissan Quest with 174,000 miles. I've been consistently receiving diagnostic codes P0138 and P0139, despite having replaced the oxygen sensors already. The issue p...

nissan quest | P0138

Dodge Dakota 1998 V6: P0351 Ignition Coil & P0138 O2 Sensor Circuit Fault - Freeway Shutdown Issue

My 1998 Dodge Dakota Sport with a 6-cylinder engine is experiencing repeated shutdowns while driving on the freeway or in stop-and-go traffic. The vehicle shows fault codes P035...

Dodge Dakota | P0138

2002 Hyundai Elantra 2.0L - P0138 O2 Sensor Code Reappears After Replacement

After clearing the P0138 fault code and replacing the oxygen sensor, why does the check engine light return with the same code? The vehicle is a 2002 Hyundai Elantra 2.0L, and I...

2002 Hyundai Elantra 2.0 | P0138

Jeep Grand Cherokee 4.0L Engine P0138 Code: Can I Bypass Catalytic Converter with Straight Pipe Without Triggering Check Engine Light?

I own a 1998 Jeep Grand Cherokee equipped with a 4.0L inline-6 engine. While troubleshooting a broken valve spring, I had the catalytic converter removed and replaced with a str...

Jeep 4.0 | P0138

Toyota Sienna 2010 LE AWD - P0138 O2 Sensor Error After Under-Hood Detailing

Hi everyone, I own a 2010 Toyota Sienna LE AWD. Shortly after a recent under-the-hood detailing session — which included cleaning the engine bay and leaving residual moisture i...

Toyota Sienna 2010 LE AWD | P0138

1999 Jeep Wrangler 4.0L P0138 O2 Sensor Post-Cat High Voltage Code Diagnosis

I own a 1999 Jeep Wrangler with a 4.0L engine and 5-speed manual transmission. After replacing the exhaust manifold, the check engine light activated approximately 50 miles late...

1999 wrangler | P0138

1998 Dodge Dakota P0138 O2 Sensor Error: Shift Issues and Electrical Troubleshooting Guide

I own a 1998 Dodge Dakota with a 5.2L V8 and automatic transmission. The vehicle exhibits erratic shifting behavior—sometimes failing to shift up, causing the engine to run in f...

98 Dakota | P0138

P0138 Fault Code on 2000 Nissan Maxima: Missing O2 Sensor at B2 Position Behind Catalytic Converter

My 2000 Nissan Maxima is equipped with four oxygen (O2) sensors as per the factory specification: B1 and B2 at the front manifold, and B1 and B2 at the rear manifold. However, I...

200 Maxima | P0138

2002 Dodge Dakota P0138 and P0141 O2 Sensor Fault: Wiring, PCM Issues, and Fix

Hello everyone, I own a 2002 Dodge Dakota 4x4 with a 4.7L V8 engine and automatic transmission. This truck is registered in California and equipped with four oxygen sensors and...

2002 Dodge Dakota | P0138

P0132 and P0138 Diagnostic Issues on 2004 Chrysler Pacifica AWD with Aftermarket Catalytic Converter

2004 Chrysler Pacifica AWD, 3.5L V6, 79,000 miles Repair History: - Installed aftermarket catalytic converter (MagnaFlow 94000 series) — incorrectly positioned due to improper ...

2004 Chrysler Pacifica | P0132