Question about 1998 Toyota Tacoma
What engine, no engine size stated so i must generalize. (hard)
you got a CEL then pulled the DTC, bravo that.. well done!@
B1S1 or B1S2, posting the actual DTC wins here,
any other DTC'S or running symptoms?????????????????????
my guess is B1S1 , due to lean lookup. bank 1 sensor 1.
S1 is the keystone of engine fueling (at idle or steady cruise) .
It determines the final air and fuel air mixtures.
the sensor can be bad.?
or any cracks in the exhaust near it.????? (fresh air is 20% oxy)
or engine really is lean.
see , 2 logic reasons, sensor bad or good and is lean for real.
if car has 100k on it, its due, for a change, anywhy
so do that.
then if it comes back, then it real (no cracks)
why is my engine really real.
its lean for a large number of possible reasons...
1: low fuel pressure.
2: MAF stuck high, or if MAP car, map reading to high.
in simple English the air sensors are fibbing showing Low air when it really air.
the air sensors. are the prime sensors.
all fuel is injected based on them. (and temperatures)
3: air leaks, on MAP cars, it dont go lean only races.
3b: air leaks on MAF , causes lean conditions, (most modes)
on a maf based engine any induction leaks too big will cause
the B1S1 sensor to loose control at idle or low speed cruise,Hot)
there are other reasons.. many.
the above is basics.
let it be said, the engine that misfires, sends a slug of oxygen
to the sensors. and causes it to mess up.
this is the bad deal with all narrow band oxy sensors...
they dont see misfire. correctly.
what we do in a shop is see if we can wake up the sensor
(no cracks found in header)
(S1 is the PRE CAT sensor , one more way to say it)
we force the EFI rich, and scan and graph the S1.
how? , well there are 2 ways.
1: is add propane gas to the induction, (air cleaner works)
2: or force fuel pressure higher, on MAF cars, we pinch the vacuum
'hose to the Fuel pressure reg, this makes it go about 10psi higher.
now you know a trick. or two.
the o2 will go rich showing that it is alive. if not , its dead.
or has horrid levels of oxygen flowing by it.
(gross misfire, burned exhaust valves, gross induction air leaks., etc)
Posted on Dec 25, 2013
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Posted on Jan 02, 2017
Hi. You need to clean the Mass Air Flow Sensor.
This is an easy job.
Get a can of throttle body or brake cleaner spray at your local auto parts store.
Open the hood, and locate the air filter box. follow the tube from the filter box towards the engine. Look for a small black box with 2 screws holding it to the air tube, Remove the wire connector and observe inside the sensor with a flashlight. You will see 2 small wires, and they will appear fuzzy or dirty. Spray the interior with the cleaner until the wires are nice and clean. Do not use compressed air, you will damage the sensor. Put it all back together and drive it.
This will def fix your issue. This is a vey common problem. If you do it yourself, you will save 70 + bucks.
Thanks for choosing FixYa, and a FIxYa rating for my assistance would be greatly appreciated.
Posted on Jan 23, 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
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160....O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 2)
P0161....O2 Sensor Heater Circuit (Bank 2 Sensor 2)
P0162....O2 Sensor Circuit Malfunction (Bank 2 Sensor 3)
P0163....O2 Sensor Circuit Low Voltage (Bank 2 Sensor 3)
P0164....O2 Sensor Circuit High Voltage (Bank 2 Sensor 3)
P0165....O2 Sensor Circuit Slow Response (Bank 2 Sensor 3)
P0166....O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 3)
P0167....O2 Sensor Heater Circuit (Bank 2 Sensor 3)
P0168....Fuel Temperature Too High
P0169....Incorrect Fuel Composition
P0170....Fuel Trim (Bank 1)
P0171....System too Lean (Bank 1)
P0172....System too Rich (Bank 1)
P0173....Fuel Trim Malfunction (Bank 2)
P0174....System too Lean (Bank 2)
P0175....System too Rich (Bank 2)
P0176....Fuel Composition Sensor Circuit
P0177....Fuel Composition Sensor Circuit Range/Performance
P0178....Fuel Composition Sensor Circuit Low Input
P0179....Fuel Composition Sensor Circuit High Input
P0180....Fuel Temperature Sensor A Circuit
P0181....Fuel Temperature Sensor A Circuit Range/Performance
P0182....Fuel Temperature Sensor A Circuit Low Input
P0183....Fuel Temperature Sensor A Circuit High Input
P0184....Fuel Temperature Sensor A Circuit Intermittent
P0185....Fuel Temperature Sensor B Circuit
P0186....Fuel Temperature Sensor B Circuit Range/Performance
P0187....Fuel Temperature Sensor B Circuit Low Input
P0188....Fuel Temperature Sensor B Circuit High Input
P0189....Fuel Temperature Sensor B Circuit Intermittent
P0190....Fuel Rail Pressure Sensor Circuit
P0191....Fuel Rail Pressure Sensor Circuit Range/Performance
P0192....Fuel Rail Pressure Sensor Circuit Low In put
P0193....Fuel Rail Pressure Sensor Circuit High Input
P0194....Fuel Rail Pressure Sensor Circuit Intermittent
P0195....Engine Oil Temperature Sensor
P0196....Engine Oil Temperature Sensor Range/Performance
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