P0C4A - OBD Trouble Code

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The hybrid battery coolant pump is present along the battery and circulates the coolant within the battery system to maintain the optimal temperatures. If the powertrain control module detects that the hybrid battery pack coolant pump is not functioning properly, it stores OBD code P0C4A in the system and starts flashing Malfunction indicator light on the dashboard.

The coolant pump works closely with the Powertrain Control Module so as to manage its functioning. The pump starts to work when the battery circuit is high and modulates the speed as per the circuit inputs. If the PCM detects any performance abnormalities in the coolant pump, it sets OBD code P0C4A in the system.

What causes this problem with the Hybrid Battery Pack Coolant Pump Control Performance?

• Hybrid battery coolant pump malfunction
• Harness to the coolant pump is opened or shorted
• Poor electrical connections to the hybrid battery coolant pump
• Hybrid battery temperature sensor faulty
• Powertrain Control Module failure

1. Engine Control Module - OBD Error Code P0C4A can also be due to faulty ECM. It’s better to get the faulty electrical replaced as soon as possible.
2. Battery Coolant Pump - Faulty coolant pump can lead to increased temperatures thus affecting the battery and the motor also. Thus, check and replace faulty pump now!
3. Coolant Hoses/Pipes - Damaged hoses can be a mechanical issue that can be resolved to solve the problem. Repair or replace the hoses as required.
4. Intercoolers - An intercooler is an intake air cooling device commonly used on turbocharged and supercharged engines. An intercooler cools the air compressed by the turbo/supercharger, reducing its temperature and thereby increasing the density of the air supplied to the engine. Visit us to buy quality intercooler today!
5. Coolant/Antifreeze - Check for proper levels of antifreeze and of proper specification too. Keeps the levels full. Buy now!
6. Cooling System - Check for different types of auto cooling system and replace the faulty parts with new ones. Check the latest collection now!
7. Diagnostic Tool - In order to detect the error, one needs high grade diagnostic tools. Visit us today to grab amazing deals.

Interested in knowing the symptoms to OBD code P0C4A? If yes, then you have arrived at the right place. We at Parts Avatar have listed out few common symptoms associated with Hybrid Battery Pack Coolant Pump Control Performance.

Common Symptoms

• Check Engine Light is On
• Vehicle running in Limp Mode for the protection of the engine
• Loss of engine power due to battery faults
• Increased hybrid battery temperatures affecting motor performance

Have a look at some ways with which you can correct the P0C4A code:

• Hybrid battery pack coolant pump replacement
• Faulty wiring and connector replacement
• Battery coolant replacement
• Coolant pump harness replacement
• PCM reprogramming and replacement

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A qualified technician who has the knowledge of industrial grade diagnostic tools should be recommended for the diagnosis Error P0C4A. 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.

• First, locate the Battery Coolant Pump which is usually located by the battery unit. Once located, find the coolant lines/ pipes in order to trace back to the coolant pump. It could be difficult to find because they are generally mounted inline of coolant flow so keep that in mind. Given the temperatures that the coolant system is exposed to, inspect the harness around the area thoroughly for signs of melting harness' or things of that nature.
• Verify the integrity of your cooling system. Check your coolant levels and also the health of the coolant. Make sure it is clean and full before proceeding.
• Measure and record the integrity of the coolant pump control circuit. Equipped with a multimeter and the appropriate wiring harness, independently test the control circuit. This may involve disconnecting the connector at the ECM (Engine Control Module) and the other end at the coolant pump. Refer to your wiring diagram for specific wiring colours and test procedures.
• Test the coolant pump depending on your particular system. Refer to service manual before proceeding, because this very well may not be applicable to you. Equipped with a 12-volt source and a good ground you could remove the coolant pump from the vehicle (this may include draining the system), and power it up to see if it fires up at all. If so, make sure it can transfer fluid as well.
• PCM diagnosing is always a last resort but sometimes it can be done with relative ease. It usually involves doing a pin out test at the PCM itself and compare your recordings to desired values. I will stress the point that every other diagnostic strategy should be exhausted beforehand.

Common Mistakes When Diagnosing OBD Code P0C4A

Some of the common mistakes done while changing diagnosing the OBD code P0C4A are:

• Improper assessment of the battery coolant pump and circuit
• Simply replacing the Powertrain Control Module (PCM) without considering other possibilities of problem
• Not noticing the damaged or loosened wiring and circuit problems