Posts Tagged: vacuum leak symptoms
Top Causes of the P0171 Code and P0174 Code
Fix a P0171 and P0174 Lean Code Using Proven Diagnostic Strategy Quick Summary The P0171 and P0174 codes are some of the most misunderstood OBD-II trouble codes. Both codes indicate the engine is running too lean—either too much air or too little fuel. A P0171 indicates a lean condition on bank 1, while a P0174 indicates a lean condition on bank 2. Most of the time, these codes are caused by something simple, such as a vacuum leak, a dirty MAF sensor, or low fuel pressure. But I’ve also seen … Read More
Why Your Engine Has a Rough Idle and How to Fix It for Good
The Real Causes of Rough Idle and High Idle Quick Summary The root cause of a rough idle or high idle is almost always extra air getting into the engine or the computer losing control of airflow at idle. Vacuum leaks, carbon buildup in the throttle body, and idle air control problems account for the vast majority of rough idle and high idle complaints. Fixing the airflow problem first saves time, money, and frustration. Article Rough Idle or High Idle? How to Diagnose and Fix Both Problems the Right Way … Read More