Question about 2000 Toyota Tacoma PreRunner
A code P0171 may mean that one or more of the following has happened:
The MAF (Mass Air Flow) Sensor is dirty or faulty Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
There could be a vacuum leak downstream of the MAF sensor
Possible cracked vacuum or PCV line/connection
Faulty or stuck open PCV valve Failed or faulty oxygen sensor (bank 1, sensor 1)
Sticking/plugged or failed fuel injector Low fuel pressure (possible plugged/dirty fuel filter!)
Exhaust leak between engine and first oxygen sensor
Posted on Jun 28, 2014
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Posted on Jan 02, 2017
SOURCE: engine light is on
You probably have a vacuum/air intake leak.
With the engine idling, spray very short bursts of starting fluid/ether around the intake and surrounding engine bay and wait a second. If the engine surges, there is an intake leak which you can identify by closing in with the ether.
ALWAYS USE VERY SMALL SQUIRTS IN A DIRECTED AREA AND WAIT FOR IT TO VENTILATE BEFORE TRYING AGAIN ELSEWHERE
Put car outside,
do this in a ventilated area,
have a blanket handy in case of a backfire fire.
DONT spray ether idirectly into the air intake when the engine is running
A bad intake leak is audible by a hissing sound. A bad rubber hose is often the cause.
Any vacuum hose under the hood can cause this.
The PCV valve which can also cause this code when faulty, should be replaced as a matter of course. its in the valve cover and only costs a coupla bucks. They are easy to fit.
Hope that helps
pls be conservative with the ether its not good for your engine in large doses!!
Posted on Jan 07, 2009
SOURCE: code p1130 p0171
P0171- mens the MAF sensor is dirty and needs cleaned. You can get MAF cleaner at your local auto parts store. The MAF is located in the air intake just after the air filter
P1130- is more than likely a result of the previous code. It is in regard to the feul/air mixture ratio. A dirty MAF can cause this code.
Also, if you are using an aftermarket oiled air filter, it would be the cause of the P0171 code.
Posted on Aug 08, 2009
check the mass air flow sensor there maybe dirt on the filiment inside the sensor causing false readings. cleaning or replacing it may make the codes go away.
Posted on Nov 18, 2009
May mean that one or more of the following has happened:
- The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
- There could be a vacuum leak downstream of the MAF sensor.
Possible solutions include...
- In the vast majority of cases, simply cleaning the MAF sensor does the trick. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
- Inspect all vacuum and PCV hoses, replace if necessary
- Check for a dirty fuel filter and proper fuel pressure
Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.
Thank you for using Fixya, and have a nice day.
Posted on Nov 21, 2011
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