Question about 2001 Suzuki Esteem
I'm assumint that you are talking about Suzuki's "recall" for MAF sensor, and there isn't info.
The MAF sensor its on the Throttle Body next to the TPS. When the MAF sensor present problems the scanner send information about DTC P0171 Trouble Code - System Too Lean (Bank 1)
Basically this means that an oxygen sensor in bank 1 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1.
Note: This DTC is very similar to P0174, and in fact your vehicle may show both codes at the same time, and few symptoms are presents, as uou will more than likely not notice any drivability problems, although there may be symptoms such as a lack of power, detonation (spark knock), and/or a hesitation/surge on acceleration.
Causes: 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.
Keep in mind this possible solutions, that 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 helps with this.
Posted on Jul 16, 2010
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Posted on Jan 02, 2017
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Fault Code Description
Common Problems Faulty Mass Air Flow sensor,Broken wire to Mass Air Flow sensor,Dirty sensing element in Mass Air Flow sensor
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Image Mass Air Flow(MAF)Sensor
The Mas s Air flow (MAT) sensor
measure s the amount of air flowing into the engine.
This value is used by the
Powertrain Control Module (PCM) in calculating the required
Fuel injector pulse within order
to provide the desired air fuel ratio. This input can also
be used in determining
Electronic Pressure Control (EPC). Shift and torque converter
The MAE sensor is located
directly in the airflow path between the air cleaner housing
and the throttle body. Ail air
entering the intake manifold must pass through the sensor.
Located in the MAT sensor
directly in the airstream are two platinum wires, a hot wire
heated by electrical current and
a cold reference wire. The MAF sensor uses the air flow
across these wires to calculate
The hot wire is maintained at
200CC (392CF) above ambient temperature as measured by
a constant cold *e. The current
required to maintain the temperature of the hot wire is
proportional to the air mass
flow. The MAE sensor then measures the amount of
electrical current required to
maintain this temperature difference and converts this
value to an analog DC voltage.
This output varies directly with the mass air flow rate.
Pay attention to the Paragraph about the torq converter.
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