2000 Toyota Tundra Trouble Code P0171

P0171 is a System Too Lean Bank 1 which is triggered by the first exhaust oxygen 02 sensor aka upstream 02 sensor on the Bank 1 side of the engine designated as whichever side has cylinder number one.

2000 toyota tundra trouble code p0171. This code number references a number that is given to you when you plug your car into a OBDII scanner. This code number references a number that is given to you when you plug your car into a OBDII scanner. Take a look around and see if you can find the vacuum leak.

Fuel Trim System Lean Bank 1. Dirty or faulty mass air flow sensor. Discussion Starter 1 Mar 12 2012.

Searched for P1130 only and got quite a few more hits. I always just use CRC Mass Airflow sensor cleaner just make sure you dont touch the wires. Heres a great YouTube video on how to find a vacuum leak.

P0171 and P0174 Codes Dont change an Oxygen Sensor Before Reading This. Check Engine Light is on. Truck ran fine with the code.

Toyota Certified Master Diagnostic Technician ASE Master Technician with L1 Advanced Engine. 80mph on interstate just fine. After that I just followed the list.

Weak fuel pump. System Too Lean Bank 1. If there are no intake leaks the next step is to replace the air filter and clean the airflow meter.