What does p0171 mean on a Toyota Corolla?
Troubleshooting P0171 Code. Oftentimes, a P0171 means that your Toyota is having trouble with a dirty or faulty mass air flow (MAF sensor, or a vacuum leak downstream of the MAF sensor (perhaps in the PCV line or in the valve itself). Of course, this code can also signify a bad O2 sensor in bank 1.
What is the trouble code on my Toyota Corolla?
One of the most common trouble codes with the Toyota Corolla is the P0171 code. This code number references a number that is given to you when you plug your car into a OBDII scanner.
How to repair fault code p0171 and reset warning light?
How to repair fault code P0171 and reset warning light Toyota Corolla VVT-i. Years 2000 to 2019 – YouTube If playback doesn’t begin shortly, try restarting your device.
What does p0171 mean on a bank 2 sensor?
Quite often P0171 is triggered in tandem with P0174, which comes on when the Bank 2 sensor detects too much oxygen in the exhaust. Oftentimes, a P0171 means that your Toyota is having trouble with a dirty or faulty mass air flow (MAF) sensor, or a vacuum leak downstream of the MAF sensor (perhaps in the PCV line or in the valve itself).
What to do if your check engine light code is p0171?
Reconnect any disconnected vacuum lines and replace any damaged vacuum lines that are leaking, then use FIXD to clear check engine light code P0171. If check engine light code P0171 is triggered again, check the rest of the vacuum lines for leaks and continue to the rest of the diagnostic process.
What is the trouble code for a Toyota V-6?
P0171 Code – Toyota. This is one of the most common trouble codes in V-6 and larger engines. 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).
What to do if check engine light code p0171 is triggered?
If check engine light code P0171 is triggered again, check the rest of the vacuum lines for leaks and continue to the rest of the diagnostic process. Remove the mass airflow sensor and clean the sensor using mass air flow cleaner or contact cleaner.
What are the symptoms of a p0171 leak?
What Is The Cause Of P0171? 1 Dirty or faulty mass airflow sensor 2 Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket. 3 Weak fuel pump 4 Clogged or dirty fuel injectors 5 Clogged fuel filter 6 Exhaust leak 7 Faulty oxygen sensor 8 Faulty air-fuel ratio sensor
Why does my check engine light read p0171?
So my 2007 Toyota Corolla (with around 89k miles) has a Check engine light that reads error code P0171 (System too lean Bank 1). I was looking that up and the few causes are: The MIL turned on after I drove 300 miles from upstate NY to long island. So my question is, how do I narrow it down to the problem?
What kind of air flow sensor does Toyota Corolla use?
Note: While this code is common on 1998 – 2006 Toyota Corolla’s with a 1.8 liter engine, there are some older Corolla’s that still flag this code but do not use a mass air flow sensor. Instead, they use a MAP sensor. For example, a 1998 Toyota Corolla uses a MAP sensor intead of a MAF sensor.