Error Code P00A4: What It Means & What To Do?
OBD Code P00A4 - Charge Air Cooler Temperature Sensor Circuit Intermittent/Erratic Bank 2
A sudden drop in the fuel efficiency and
the engine performance may be an indication of problem with the transmission
and fuel systems, thus indicating OBD Code P00A4 Error. OBD-II Code Powertrain
Control Module (PCM) failure is defined as a Charge Air Cooler Temperature
Sensor Circuit Intermittent/Erratic.
Learn More About OBD Error Code P00A4
The Intake Air Temperature Sensor measures the
air temperature going into the engine and the engine control module (PCM) uses
this information to determine how much fuel to air ratio to maintain for the
engine to run properly. When the PCM detects a problem with this sensor or the circuit
for the sensor, it will set code P00A4.
The IAT (Intake Air Temperature) sensor is used
to read the amount of air entering the engine through the intake pipe/intake
manifold and the PCM adjusts how much fuel to enter the combustion chamber for
a perfect air/fuel ratio. When the PCM (Powertrain Control Module) detects
there is a problem with IAT (intake air temperature) sensor 1 on the vehicle a
trouble code will set. This code is set
for the bank 2 side of the engine.
What causes
the problem with the Charge Air Cooler Temperature Sensor Circuit?
- Intake Air Temperature Sensor faulty
- Damaged wiring/ connections to the IAT (Intake
Air Temperature) Sensor circuit
- Faulty PCM (Powertrain Control Module) taking
wrong reading from the IAT
- Leakage/ Clogged intake/inlet pipe
- MAF (Mass Airflow
Sensor) faulty
or damaged
Replace/Repair These Parts To Fix OBD Code P00A4
- Turbocharger - Damaged
turbocharger is not able to push extra air into the engine which directly
hampers the performance. Replace your damaged turbochargers with us!
- Supercharger - Faulty
supercharger hampers the density of air entering the engine which affects the
power output. Replace damaged supercharger and parts
today!
- Air Temperature
Sensor - Faulty Air Temperature sensor affects the
combustion process of the engine and thus the performance. Replace faulty
sensor now!
- Engine Control
Module - Faulty ECMs may lead to engine stalling or not
starting, and check engine lights being on. Replace faulty ECM
components with us.
- Intercoolers - An intercooler is an intake air cooling device commonly used
on turbocharged and supercharged engines and varies the temperature of air entering the engine. Visit us to buy quality intercooler today!
- Powertrain Control
Module - P00A4 error
can also relate to fault in the PCM and other electrical components. Buy all
the Powertrain related parts with us.
- Diagnostic Tool - Visit us today to grab amazing deals on quality
diagnostic tools to detect and correct the OBD error codes.
Symptoms Of OBD Error Code P00A4
This fault may cause reduced power, the
engine may run rough, or the engine may crank but not start. There is typically
an illuminated Check Engine light as well. At Parts
Avatar Canada find genuine replacement parts and performance parts for your vehicle. This error may also indicate problems that will likely affect:
Common Symptoms
- Check Engine Light will illuminate
indicating error P00A4 code by the PCM
- Engine lacks power and reduces performance
and acceleration
- Increased fuel consumption due to problem
in fuel delivery system
- Unusual throttle response
and stalling
How To Correct P00A4 Charge Air Cooler Temperature Sensor Circuit Intermittent/Erratic Bank 2
Some
of the common fixes for the problems in the OBD Code P00A4 for all makes and
models are as follows;
- IAT
(Intake Air Temperature) Sensor replacement as might be taking wrong readings
- Repair
or replace damaged wiring/connections to the IAT (Intake Air Temperature)
Sensor
- Replace
faulty PCM that is unable to read IAT data.
- Leaky
and damaged intake/inlet pipe should be replaced
- Replacing faulty MAF (Mass Airflow Sensor)
Easy Diagnosis Of Engine Error OBD Code P00A4
A qualified technician who has the knowledge of
industrial grade diagnostic tools should be recommended for the diagnosis Error
P00A4. Proper checks of the wirings and connectors as well as sensors, ECM/PCM
fuel delivery system, transmission system, etc., should be done. Following are
some points to be taken care of during the diagnosis.
- Visual inspection of the charge air cooler
temperature sensor and the corresponding wiring should be done to check for any
loose connections, damaged wiring, etc.
- Also check the charge air cooler and ducting
for any damaged and do the repairs accordingly. Later check if the code
reappears.
- 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 P00A4
- Some of the common mistakes done while changing
diagnosing the OBD code P00A4 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