Guide To P0C4D OBD Error Code Solutions

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If you experience exponential drop in the fuel economy, and your car engine is stalling with improper throttle response and Check Engine Light turned on. It might be an indicative to OBD Code P0C4D error.

OBD-II Code Decreased engine performance is defined as a Hybrid Battery Pack Coolant Pump Supply Voltage Circuit High.

When the PCM detects any out of the normal voltage differences in the hybrid battery coolant temperature sensor, it stores the specific OBD code error. When the PCM senses a high voltage signal from the coolant pump supply circuit, the P0C4D error gets stored in the system and thus the vehicle can go into limp mode.

What causes this problem with the Hybrid Battery Pack Coolant Pump Supply Voltage Circuit High?

• Burnt, damaged, shorted, disconnected, or corroded wiring and/or connectors
• Vacuum leaks caused by damaged, split, dislodged, hardened, or perforated vacuum lines
• Defective coolant pump actuator and coolant control solenoid
• Defective hybrid motor
• Mechanical defects of the variable vanes
• Defective, or malfunctioning battery temperature sensor
• Restricted intercooler PCM or PCM needs reprogramming

1. Engine Control Module - Faulty ECM leads to engine stalling or not starting, vehicle going into limp mode and check engine lights being on. Replace damaged ECM now!
2. Diagnostic Tool - Always take help of professional mechanic to resolve OBD code P0C4D error. Buy new tools and equipment from us today!
3. Coolant Hoses/Pipes - Check for leakages and joint problems at the pipes and hoses and replace them immediately.
4. Coolant/Antifreeze - Always check for optimal coolant and antifreeze levels and refill them now!
5. Cooling System - Check and replace faulty coolant system parts as they can badly hamper other components and cause expensive damages.
6. Battery Coolant Pump - If the battery coolant pump is faulty, it might need immediate replace as the battery motor might be performing to full potential.

Interested in knowing the symptoms to old code P0C4D? 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 Supply Voltage Circuit High

Common Symptoms

• Affected hybrid motor power and acceleration
• Malfunction indicator light on
• Irregular throttle response

Learn the ways with which you can correct this trouble code P0C4D:

• Repair or replace malfunctioned hybrid battery coolant pump
• Repair or replace faulty wiring and connectors to the circuit
• Replace faulty hybrid motor
• Repair and reprogram faulty powertrain control module

Don’t get tensed if you are still facing any of these issues as we care for our customers and that’s why we offer a good range of Coolant Pump, Coolant Pump Harness, Coolant Pump Circuit, Engine Control Module, Hybrid Powertrain Control Module and a lot more. We are sure that now all your issues would be resolved.

P0C4D is properly diagnosed with an advanced scan tool capable of factory sensor readings (not just one from an auto parts store). A qualified technician can read the data from the advanced scan tool to determine when the problem occurred, or if it is still occurring. They may clear the code/light and test drive the vehicle while monitoring the scan tool data to see if the fault returns or is present.

Based upon the conditions of the test, possibly clearing the code, and road testing the car while monitoring the data, further diagnosis may be required. Diagnosis may require multiple steps such as:

• Record all fault codes present, as well as all available freeze frame data. This information can be of use should an intermittent fault be diagnosed later on.
• Knowing how hybrid battery coolant system work makes diagnosing faults in the system considerably easier, so spend an hour or so reading the relevant section(s) in the repair manual, and be sure to use the manual to locate all the parts and components that make up the system. Do not proceed to next step without understanding of how the system works, where all the components that make up the system are located, and how these components interact to make the system work as intended.
• If the hybrid motor does not rotate freely, or does not rotate at all, consult the manual to determine the correct procedure to test the resistance, and continuity of the motor, as well as all associated wiring, sensors, and connectors.
• If the hybrid battery coolant pump is controlled, locate all associated hoses, actuators, and control solenoids. Inspect all hoses for visible damage such as splitting, cracking, hardening, or perforations, and replace all hoses and lines as required.
• If no damage to pump lines is found, locate the actuator that controls the vanes, and connect the coolant pump to it where the system normally attaches to the actuator.

Common Mistakes When Diagnosing OBD Code P0C4D

Always take assistance of a qualified technician to know the problem to this error. Never lose sight of the symptoms and never be in hurry to come to a conclusion as sometimes very small issue can lead to flashing of the OBD errors. Some of the major mistakes related to code P0C4D are mentioned below.

• Replacement of the coolant pump without checking the associated wiring and terminals.
• Powertrain Control Module (PCM) replacement without inspecting the sensors and data transmission units.
• Worn out and damaged wiring and connectors not checked and replaced.