P00A3 - OBD Trouble Code
OBD Code P00A3 - Charge Air Cooler Temperature Sensor Circuit High Bank 2
Is your Check
Engine Light illuminated on the car’s dashboard? Are you experiencing sudden
drop in the fuel economy with stalling of the engine? Or is there any smoke
coming from the exhaust pipe? Then, there might be a possibility of an issue
with the Air Cooler Temperature Sensor of the car thus indicating OBD Code
P00A3 error.
Learn More About OBD Error Code P00A3
The Charge Air Cooler Temperature Sensors informs the engine PCM
about the temperature of the air going into an out of the charge air cooler
assembly. The function of the Charge Air Cooler Assembly is to cool the air
coming out of the turbocharger before the air goes into the engine. If the PCM
detects an incorrect signal from the sensor, it will set code P00A3.
A Charge Air Cooler also known as an Intercooler is found on turbocharged/supercharged
vehicles. The compressed hot air by the
turbocharger/supercharger enters the Charge Air Cooler where it cools down
before entering the engine. Without the Intercooler, the air entering the engine
would be hot causing the engine to run very inefficiently and possibly causing
engine knock.
What causes the problem with the Charge Air
Cooler Temperature Sensor Circuit?
- Faulty Air Cooler Temperature Sensor
- Faulty or damaged wiring to the sensor or circuits
- Improper functioning of the Intercooler
- Faulty PCM exhibiting wrong code
Replace/Repair These Parts To Fix OBD Code P00A3
- Engine Control
Module - OBD Error Code P00A3 can also be due
to faulty ECMs. It’s better to get the faulty electricals replaced as soon as
possible.
- Intercoolers - Damaged intercooler leads to wrong temperature air entering the engine thus reducing the performance.
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- Turbocharger - A turbocharger can increase the power output
by forcing extra air into the combustion chamber. Replace your old/faulty
turbochargers with us!
- Supercharger - Damaged/faulty supercharger reduces the combustion inthe engine thus
reducing the power. Replace damaged supercharger and
parts today!
- Air Temperature
Sensor - The damaged Air Temperature sensor
can read the air entering the engine wrongly, thus hampering the performance. Replace faulty sensor now!
- Powertrain Control
Module - Faulty PCM can easily distorted
engine timing causing frequent halting. Find all the Powertrain related parts
with us.
- Diagnostic Tool - In order to detect the error, one needs high grade
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Symptoms Of OBD Error Code P00A3
Error
code P00A3 can flash due to many reasons, be it damaged wirings, faulty
temperature sensors, intercoolers or the ECM itself hampering the engines
performance by not being able to control the temperature of the air entering
the engine.
Common Symptoms
- Check
engine light illuminated
- Reduced
engine performance
- Increased
in fuel consumption
- Vehicle
stuck in "limp" mode to protect the engine from further damage
- Diesel
particulate filter regeneration inhibited
How To Correct P00A3 Charge Air Cooler Temperature Sensor Circuit High Bank 2
Some of the components that are directly affected and can be examined first to detect the problem and solve it are mentioned below.
- Replacement CACT
(Charge Air Cooler Temperature Sensor) – It is the prime component that
keeps the check on the temperature of the air entering and exiting the
Intercoolers before finally entering the engine.
- Bad wiring to the
CACT (Charge Air Cooler Temperature Sensor) can be the first reason for
the sensor’s fault and fault in the Intercooler by giving wrong
temperature readings as well as not functioning properly to reduce the
temperature and for the Error P00A3 to flash by the PCM.
- PCM (Powertrain Control Module) – If all the other tests deemed out to be perfect, then the PCM should be checked for faults and replaced or reprogrammed if necessary.
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Easy Diagnosis Of Engine Error OBD Code P00A3
Inspect the charge air cooler temperature
sensor and the corresponding wiring and look for loose connections, damaged
wiring, etc. Also, visually inspect the charge air cooler and ducting. If
damage is found, repair as necessary, clear the code and see if it returns.
- Use a scan tool to monitor the charge air coolant temperature sensor data parameter. Disconnecting the CACT sensor should drop the value very low. Connect a jumper wire across the terminals, and if the scanner shows a very high temperature, that means the connections are sound and the ECM can recognize the input.
- Test the CACT sensor: After disconnecting the
charge air cooler temperature sensor connector, resistance between the two
sensor terminals is measured. After starting the engine, the values should decrease
smoothly as the engine warms up. If engine temperature increases but CACT
resistance does not decrease, the sensor is faulty and needs replacement
Common
Mistakes When Diagnosing OBD Code P00A3
- Some of the common mistakes done while changing
diagnosing the OBD code P00A3 are:
- Improper assessment of the CACT Sensor
- Simply replacing the Powertrain Control Module
(PCM) without considering other possibilities of problem
- Not noticing the damaged or loosened wiring and
circuit problems