Guide To P0603 OBD Error Code Solutions

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What is a KAM? When does the P0603 error code pop up in your vehicle? The powertrain control module also known as the ECM, Engine Control module in cars are responsible for taking care of components that is linked with vehicle operation like ignition timing, fuel mix etc. It also has information when you drive vehicle and it learns your driving pattern and suits the performance to match driving needs as well as the drive conditions. This is known as KAM, Keep Alive memory.

The memory will change depending on the driver and the sensor inputs. If you disconnect the battery, it will erase all the memory forcing the PCM to dumb mode. The Powertrain control module has many vital functions in a vehicle like managing the fuel system, Transmission, Anti-Lock Brake and Traction Control systems etc. The Powertrain control module performs a simple mathematical calculation by regularly running a self-diagnosis. And if any of these results are not as expected, then the P0603 code will be set.

The error code P0603 means that the keep alive memory of the PCM is faulty, damaged or broken. It is a general self-test performed on a regular basis throughout the day. This condition is said to be critical because the keep alive memory modules of the PCM will store all the extra adaptive calculations which has to be alive or saved when the vehicle is not functioning. If this particular functionality is not reliable, then it’s impossible to trust the PCM to do its job and needs replacement.

What causes this problem with the Internal Control Module Keep Alive Memory (KAM) Error?

• Battery terminal is corroded.
• Battery terminal has loose connections.
• The circuit of Keep Alive Power Wire Routing.
• Fault in charging the ignition system resulting in secondary fault in the ignition voltage inference.
• KAPWR circuit has open wire.
• Faulty Powertrain control module, water intrusion and interior fault.
• Interior Powertrain control module program fault.

1. Battery Terminal - There are chances that your battery terminal is damaged, broken or corroded. Replace the damaged part immediately.
2. Powertrain Control Module - A faulty PCM is one of the common errors in most of the in most of the vehicles. Visually check the element and replace them if needed.
3. Engine Control Module - Replacing a faulty or damaged engine control module can help you to get rid of this error code.

Willing to know some common symptoms of OBD Code P0603? Your wish is our demand. Have a look at them below:

Common Symptoms

• Impossible to start or no start.
• Engine delay.
• Rough or irregular shift in transmission.
• Reduced fuel economy.
• Engine dies while stopping.
• Conditions of misfire.

We have listed out some ways which would help you to correct the occurrence of OBD Code P0603. They are mentioned here as follows:

• Replacement of the defective or damaged connectors, components or wires. Also, make sure that all the connectors are properly secured.
• Replacement of the faulty components in each of the individual control modules.
• Replacement of the faulty Powertrain control module

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

• In order to diagnose this problem, the technician will initially start checking the cables. The problem can be very simple like a loose connection or corroded terminals. Also, the technician will check the connection to the grounds, fuse box as well as the Powertrain control module.
• Now the technician will check the charging system and run the vehicle by connecting with alternator. There can be intrusions and so check again by removing the alternator.
• Now the final step is to check the wires, which runs pretty close to the ignition system. If there is any intrusion it will be thrown into the circuit. Also, a check on the coil for cracks, spark plugs, or other places, where there is a leak will be performed.

Common Mistakes When Diagnosing the P0603 Code

• Replace the Powertrain control module when the main reason
• You have to replace the Powertrain control module if the main reason is insufficient voltage to the PCM KAM circuit.
• You have to replace the Powertrain control module if there is a damaged PCM ground circuit.