Error Code P0188: What It Means & What To Do?
OBD Code P0188 - Fuel Temperature Sensor B Circuit High Input
The P0188 fault code can be defined as fuel
temperature sensor ‘B’ circuit high input. Are you facing some defaults in the
intake air temperature sensor? Or is your ambient temperature sensor poor?
Defects in the fuel temperature/composition sensor? Then there are chances that
P0188 fault code is soon going to appear.
Learn More About OBD Error Code P0188
The fuel temperature sensor would identity the
presence of contamination, like water, ethanol and dirt. It also makes sure to
measure the fuel temperature inside the fuel tank to make sure that the
temperature of the fuel would remain within the appropriate range.
Now if the fuel temperature would go out of the
predetermined range, then the fuel temperature sensor will send a signal to the
powertrain control module which will then store the P0188 fault code.
It all depends upon the type of vehicle; the
check engine light can start appearing immediately or after several failure
cycles.
What causes this problem with the Fuel Temperature Sensor B Circuit High
Input?
- There can be some defaults in the
intake air temperature sensor
- Poor ambient temperature sensor
- Defects in the fuel
temperature/composition sensor
- The wiring or connectors might be
open, shorted, or damaged
- Powertrain control module
programming error
Replace/Repair These Parts To Fix OBD Code P0188
- Fuel Temperature
Sensor - There can be some issues with the
Fuel Temperature Sensor due to which you may see P0188 code appearing over and
over again. Visit us to buy best quality Fuel Temperature Sensor online.
- Oil Pressure sensor - Are you facing some faults in your Oil Pressure sensor?
Don’t worry and get them replaced or else P0188 code can turn up.
- Powertrain Control
Module - Oil Pressure sensor is perfectly
fine but still but having that trouble code P0188 flashing? In such a situation
your Powertrain Control Module might be faulty. Why don’t you think of getting
that replaced?
- Diagnostic Tools - Willing to purchase some top-notch diagnostic tools online? We are
here at your service.
Symptoms Of OBD Error Code P0188
Willing to know some common symptoms
of OBD Code P0188? Your wish is our demand. Have a look at them below:
Common Symptoms
- Sometimes there might be no symptoms
at all
- An illumination in the check engine
light
- Car can start hesitating
- Issue that car will not start at all
- Car will stutter when it is
accelerating
- There can be some other fuel system codes
stored in the powertrain control module
How To Correct P0188 Fuel Temperature Sensor B Circuit High Input
We have listed out some ways which would help
you to correct the OBD P0188
- First of all if you find out that there
are any fuel temperature sensor wires that are broken, shorted, frayed or
damaged, then all of them should be replaced
- Repairing any damage or corrosion of
the fuel temperature sensor connector
- The fuel temperature sensor should
be replaced
- Make sure that you replace the faulty fuel pump
- Replacing or reprogramming the power
control module
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Easy Diagnosis Of Engine Error OBD Code P0188
You must use digital volt-ohm meter
and an electrical wiring diagram and repair manual to diagnose faults in the
FTS circuit and FTS.
The FTS is situated in the fuel
tank, as part of the fuel sending unit, or practically anywhere else, before
the fuel injectors, in the fuel system. You can always check your manual for the precise location of the FTS.
It would depend on the location of
the ECM and FTS you may have to work to get at their connectors, such as if
located in the fuel tank under the seat. One can start this diagnosis from the
ECM or from the FTS, it would all depend on what can be easily accessed.
The wiring and connectors should be
inspected for damage that would make repair necessary
You can always use an OBD-II scanner
to get the trouble codes and freeze frame data from the power control module
All the codes should be cleared up
and perform a test drive to see if the code returns
If the P0188 trouble code does not
immediately return, an intermittent problem is possible.These are challenging
and may need to worsen before making a diagnosis
- If you find out that the P0188
trouble code returns immediately at the fuel temperature sensor connector, then
you must check reference voltage and ground signals with a digital volt
ohmmeter
- If there is no voltage, then you
should use a digital volt ohmmeter to check for continuity and resistance on
the reference circuit
- If required, then you should replace
the connectors and wiring that are exposed or shorted and the system should be
tested again
- If there is no ground signal, then
use an oscilloscope to test continuity and resistance on the ground circuits to
see if the results match the specifications that are provided by the
manufacturer
- If there is both a reference voltage
and ground signal, then connect the oscilloscope to the fuel temperature sensor
signal wire to observe waveform patterns. This should match the specifications
that are provided by the manufacturer as well. They will be able to interpret
the results from the live data
- Compares sensor waveform frequency
with actual fuel composition. If the frequency is high, this means that
contaminants in the fuel are high as well
- The fuel temperature sensor waveform
pulse width data should be compared with actual fuel temperature data. If the
pulse is fast, this means that the fuel temperature is high
- If the data that has been collected
does match the verified conditions, there could be a problem with the power
control module. However, problems with the powertrain control module do not
happen often
- If the data that has been collected
does not match the verified conditions, then replace fuel temperature sensor
- The fuel system should be tested to
make sure the repair is successful
Common Mistakes When Diagnosing The P0188 Code
- The most common mistake which is
made by a number of people when diagnosing the P0188 trouble code is when a
determination is made that the fuel temperature sensor needs to be replaced
without actually inspecting the other parts of the fuel system
- Make sure that you carefully inspect
the wires and grounds and ruled out as the cause before the sensor is replaced