Northridge Auto Repair

Volkswagen dashboards are pretty good at getting your attention. When the light comes on, the car may still feel fine, or it may stumble and idle roughly. The code stored in the computer points us toward a system, then testing finds the exact part or setting that failed. Here are five VW codes we see often, what they usually mean, and how we approach them, so you are not guessing. 1. P0171 System Too Lean (Bank 1) This code says the engine computer keeps adding fuel to hit the target mixture. On many VW models, the usual suspects are unmetered air leaks, a dirty or failing mass airflow sensor, or vacuum leaks at the PCV assembly. Split intake boots after the MAF are common. You might notice a light surge at cruise or a rough idle on cold starts. Our first steps are a smoke test of the intake, live data review of fuel trims, and a close look at the PCV system. If the MAF is dirty, we clean it properly and verify readings at idle and at a set rpm. Fixing the air leak ... read more

Small spots under your Audi can turn into big repairs if they are ignored. Modern Audi engines use tight sealing surfaces and lots of rubber gaskets that work hard in heat and traffic. As those parts age, a slow seep can become a steady drip. Finding the true source early protects the timing system, the turbo on equipped models, and keeps the driveway clean. Why Audi Engines Develop Leaks Over Time Heat cycles harden rubber and flatten gasket surfaces. Direct injection and compact engine bays keep temperatures high around covers and housings. Once a seal loses elasticity, vibrations open a path for oil to escape. Short trips add to the problem because moisture and fuel traces age the oil and the soft parts faster. A healthy crankcase ventilation system is critical, as excess pressure can push oil past the weakest seal. Valve Cover Gaskets and PCV Issues Valve cover gaskets are common leak points on many Audi four and six cylinder engines. You may s ... read more