I actually did a 3 step fuel system clean yesterday, and replaced. Inspect the maf sensor for dirt or damage, check for vacuum leaks around intake hoses, and test fuel pressure I replaced both of the vacuum lines above and there is no change (i replaced the brake booster one last year and the other one today)
Best Repair Shops for Oxygen Sensor Replacement in Madison - RepairPal
If your volkswagen jetta has p0171 and p0174 together, it rules out a few problems and provides anecdotal evidence to help narrow the problem
It’s likely that your jetta’s o2 sensors are.
How to fix when oxygen sensor codes keep coming back after replacement of the o2 sensor 5 mistakes everyone makes when fixing o2 sensor problems! When the diagnostic trouble code (dtc) p0171 appears on a volkswagen vehicle, it indicates that the fuel system is running too lean on bank 1. If you’ve replaced your o2 sensor and are still getting a code, it’s possible that the problem isn’t with the sensor itself
Instead, there could be an. This is a common, inexpensive diy fix One reason you may be getting this error is a dirty or broken mass airflow sensor (maf sensor), which detects how much air is flowing into your.
