Traditional gasoline car fault

Timing Belt Replacement Causing P0171 System Too Rich Code in [Vehicle Model]?

I recently had my timing belt replaced on a [Vehicle Model]. Since then, the vehicle has been idling roughly and the check engine light is triggered with code P0171 — system too...

unknown | P2177

Bank 2 Sensor 2 Fault in 2004 Chevrolet Silverado: Diagnosing and Fixing Low Knock Sensor Input

The check engine light came on in my 2004 Chevrolet Silverado, and the initial diagnostic indicated a faulty knock sensor #2. I took it to a trusted mechanic who performed a sec...

Silverado | P2177

Nissan Cube Z11 - A/F Alpha B1 Reading at 90-100%: What Does This Mean for Engine Health?

What is the expected A/F Alpha value for a healthy Nissan Cube Z11 engine? The vehicle was initially brought in with a no-start condition. A visual inspection of the spark plugs...

Nissan Cube Z11 | P2177

2007 Dodge Charger RT (5.7L) OBD-II Inspection Failure: No Communication with ECM

I own a 2007 Dodge Charger RT with a 5.7L engine, non-police package. During a required inspection, the technician reported that the OBD-II scanner failed to establish communica...

2007 Dodge Charger | P2177

2008 GMC Acadia Running Lean on Bank 2, Rich on Bank 1: P0050, P0174, P0172 Diagnosis

My 2008 GMC Acadia is showing fault codes P0050, P0174, and P0172. The engine runs lean on bank 2 and rich on bank 1. I have already ruled out vacuum leaks and replaced all four...

Acadia GMC 2008 | P2177

2001 Jeep Cherokee OBD2 Codes PO136, PO130, PO138, PO751, PO455, PO740 - Troubleshooting Guide

I own a 2001 Jeep Cherokee with the check engine light on for an extended period. Using an OBD2 scanner, I've retrieved six distinct fault codes: 1) PO136 – Oxygen Sensor Heat...

2001 Jeep Cherokee | P0171

2012 Dodge Challenger P0300 Pending Code Reset & EGR Not Ready Issue: How Many Drive Cycles Required?

I own a 2012 Dodge Challenger with a 5.7L V8 engine and am experiencing an issue related to emissions system reset after addressing a misfire. Here are my two questions: 1) Wha...

2012 Dodge Challenger | P2177

6G72 Engine Codes P0175/P0171/P0134/P0135/P0340/P0335 - 2002 Eclipse GT (201k miles) Idle Drops to 400 RPM

My 2002 Eclipse GT (6G72 engine) has recently triggered multiple diagnostic trouble codes: P0175 (running too rich on bank 2), P0171 (running too lean on bank 2), P0134 (oxygen ...

02 Eclipse GT | P2177

2003 Mazda6 4-Cylinder P2177 Fault: How to Diagnose and What It Means for Safety and Smog Compliance

My fiancé recently purchased a 2003 Mazda6 with a 4-cylinder engine from a used car dealership about three days ago. The vehicle has not been driven extensively prior to today. ...

03 mazda 6i | P2177

2001 Chevy S10 PU PO446 EVAP Code: Diagnosis and Fix Guide

I own a 2001 Chevrolet S10 Pickup with a 4.3L V6 engine. When the EVAP system monitor becomes ready, it triggers a persistent PO446 code, causing the 'Service Engine Soon' light...

446 | P2177

2007 Chevrolet Silverado 5.3L Fuel Evaporative System Fault: How to Fix EVAP Code and Pass Oregon Emissions

I'm troubleshooting a persistent EVAP system fault on my 2007 Chevrolet Silverado 5.3L with an active OBD2 code related to the fuel intake and evaporative emissions system. When...

2007 Silverado 5.3 | P2177

99 GMC Suburban 5.7L Vortec Fuel Trim Issues: Lean Idle, Surging & O2 Sensor Erratic Readings with Whipple Supercharger

I'm experiencing persistent fuel trim issues on my 1999 GMC Suburban with the 5.7L Vortec engine. At idle, short-term fuel trims (STFT) are consistently between 14% and 17%, whi...

99 GMC Suburban | P2177

2007 Silverado 5.3. Fuel Intake and Evap Issue

I know that there posts on this issue but mine is a tab different. My 07 Classic has NEVER taken fuel from a high pressure gas pump. Sometimes it takes 10 minutes to fill up. I ...

2007 Silverado 5.3 | P2177

2007 Pontiac G5 Multiple OBD2 Codes (P0030, P0036, P0053, P0054, P0102, P0443) - How to Diagnose and Fix?

I'm experiencing multiple OBD2 diagnostic trouble codes on my 2007 Pontiac G5: - P0030: HO2S Heater Control Circuit (Bank 1 Sensor 1) - P0036: HO2S Heater Control Circuit (Bank...

2007 Pontiac G5 | P2177

CAN-CBL-02 Fault Code on 24V Truck ECU: Can Arduino Read CAN Data at 24V?

Hi everyone, I'm reaching out for some help with a CAN bus issue I've encountered while trying to read data from a truck's ECU using an Arduino and ELM327 adapter. So far, I'v...

trucks | P2177

2008 Jeep Grand Cherokee 4.7L Engine Misfire & P0430 Catalyst Code Troubleshooting

I've been experiencing recurring Check Engine Light issues on my 2008 Jeep Grand Cherokee with the 4.7L V6 engine. The problem started with a persistent P300 code indicating ran...

2008 Jeep Grand Cherokee | P2177

2009 Cobalt P0010 and P0011 Trouble Codes: Intermittent Rough Idle Issue

I have a 2009 Chevrolet Cobalt and am experiencing intermittent trouble codes P0010 and P0011. When the check engine light comes on, the vehicle exhibits a rough idle. However, ...

2009 Cobalt | P2177