Question about Toyota Cars & Trucks
My 4runner hesitates on accelaration and sometimes seems like its not getting any fuel. Code P0171 is coming up on code reader
You checked the fuel pressure? What is it. P0171 says system lean, this can be a fuel pressure issue or lack of it, it can be a defective O2 sensor or wiring or an engine vacuum leak at the intake manifold or any vacuum hose.
Posted on Nov 01, 2012
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Posted on Jan 02, 2017
you nead to check all you vacuum lines for leaks it sounds like you have a vacuum leak or the o2 sensor is going bad on bank 1 **** i still say vacuum leak
Posted on Nov 23, 2008
Hi. the fuel pressure sensor is part of the fuel pump assembly. You will have to remove the fuel pump to replace this. I would go ahead and replace the fuel pump while you are there.You will have to Pull the strainer off the fuel pump and discard it. remove the
retaining clip for the fuel pressure regulator so that you can remove
the fuel pressure regulator. Disconnect the electrical connections for
the fuel pumps and the fuel level sensor. Remove the retaining clip for
the fuel level sensor and remove the fuel level sensor by squeezing the
locking tangs. the sensor is incorporated in this area.
Please rate and god bless.
Posted on Mar 26, 2009
P1135 Air-Fuel Sensor Heater Circuit Response.
the air fuel sensor malfunction is the main problem and thats causing the code p0171.
Hard to start o long cranking time to starter is gona be the first symtoms.
replace upstream. (the air fuel Sensor and the oxygen sensor is the same)
Posted on Mar 24, 2010
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