P245A OBD Error Code: Problem & Solutions

When the engine stays in active regeneration mode, the EGR cooler bypass valve will try to detour the EGR cooler. This process will avoid further pollution of the EGR cooler. In this diagnostic process, there are 2 steps. When the key is on, the ECM will look after the correct status response by driving the control line to low and high position. Throughout the operation, the engine will make sure that the status response voltage is within 5-8 volts. The voltage which lies between 1.0 and 1.7 volts will be sent as a signal by the EGR cooler bypass valve and it gets stored as an error by the ECM. Monitoring the EGR temperature is the second part. The temperature limit of the EGR cooler bypass valve will exceed if the EGR cooler bypass valve was placed in a wrong bypass mode which finally triggers an error. After this failure and diagnostic runs, the ECM will illuminate the MIL. Once the diagnostic passes in each of the 4 successive drive cycles, the MIL will be turned off by the ECM.

What causes this problem with the Exhaust Gas Recirculation Cooler Bypass Control Circuit/Open?

• Malfunctioning of the EGR cooler bypass valve.
• The EGR cooler might be broken or there might be blockages.
• Failure of the temperature switch.
• The buildup of carbon is excessive.
• Wires might be damaged or faulty.
• Connectors might be rusty, faulty or unattached.
• ECM might be damaged.
• Exhaust gas recirculation (EGR) temperature sensor might be defective.
• The exhaust gas recirculation (EGR) temperature sensor harness might be open or shorted.
• The electrical connection of the exhaust gas recirculation (EGR) temperature sensor might be weak

1. Exhaust gas recirculation cooler - Fixing the faulty exhaust gas recirculation cooler can help to avoid the P245A error code.
2. Exhaust gas recirculation cooler bypass valve - Check if the exhaust gas recirculation cooler bypass valve is broken or damaged? If so replace it as soon as possible.
3. Powertrain control module - Any corrosion or break in the internal wiring harness can cause a short in your powertrain control module. If you’re powertrain control module. is shorted, then you must change the powertrain control module (PCM) as soon as possible to avoid the P245A error code.
4. Engine control module - Overheating of the engine control module can likely damage your ECM. Change it quickly by getting a new engine control module from PartsAvatar.
5. Coolant temperature sensor - One of the symptoms for a faulty coolant temperature sensor or switch is poor fuel economy. Replace it as soon as possible.
6. Coolant system - If the cooling fan stops workings, then the coolant system will start malfunctioning. Get the right replacement of coolant system from PartsAvatar to avoid P245A error.

It is essential to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P245A here:

Common Symptoms

• The emission test turns out to be unsuccessful by the engine.
• There might be a ping or knock on the ignition during acceleration.
• Fuel consumption is more.
• Deprived engine performance.
• Illumination of the service engine soon light might take place.
• Flashing of the check engine light.

Here are some ways with the help of which you will be able to correct the OBD Code P245A.

• Replacing the damaged ECM/PCM.
• The malfunctioning exhaust gas recirculation cooler must be altered.
• The damaged coolant temperature switch needs replacement.
• Fixing the defective engine wiring connectors.

There is no need to be anxious as Parts Avatar – Car Parts Online is here to help you out! We have high-grade EGR cooler bypass valve, EGR cooler, PCM, ECM, temperature switch, coolant system, EGR cooler assembly and a lot more for our precious customers.

Here are some steps which you should follow in order to diagnose this fault code:

• As a primary step for any failure, you must check the TSB which is specific to your vehicle by year, model and power plant. This can help in saving a lot of timing by guiding you on the right path.
• The next step is to find out every component that is linked with the EGR coolers bypass valve and look in for possible damages.
• Depending on your vehicle, the circuit may include several other components like temperature switch, bypass valve, EGR valve, EGR cooler, and the ECM.
• Carefully check the linked wires for any damages like scraping, rubbing, bare wires or burnt wires.
• Secondly, inspect the connectors as well as the connections for proper security, erosion and defective pins.
• This process must contain every wire and the components which also includes the EGR temperature switch and the ECM.
• You can always check the particular data of the vehicle to confirm the configuration of the EGR cooler bypass valve control circuit and make sure that every component is incorporated within the circuit which also has a fuse and fuse-able link in a few applications.

Advanced steps

• The advanced step for each vehicle varies and needs the proper tools to perform correctly.
• The process needs a digital multimeter and particular technical references for your vehicle.

Voltage Check

• A requirement of the reference voltage and acceptable ranges will vary depending on specific models of your vehicle as well as the configuration.
• The technical data which is specific contains the troubleshooting charts and the appropriate order in order to assist you with the right diagnosis.
• While inspecting, if you don’t find the power source or ground, you have to check the integrity of the wires, connectors, and other components by carrying out a continuity test.
• Remove the power from the circuit and carry out the continuity test and the correct reading for the wires and connections must be 0 ohms resistance.
• If you don’t find resistance or continuity, then the wires might be open, shorted or eroded which must be changed.

Common Mistakes When Diagnosing the P245A Code

• The EGR cooler assembly might be broken.
• Malfunctioning of the EGR cooler bypass valve.
• Broken powertrain control module.