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AutoCodes - Generic - P0603

P0603 Code - Internal Control Module Keep Alive Memory Error

- Code Popularity: 93,335 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P0603?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Loose or poor battery terminal connection
  • Low battery charge
  • Engine Control Module (ECM) / Powertrain Control Module (PCM) power supply circuit is open or shorted
  • ECM/PCM Programing
  • Faulty ECM/PCM
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How to Fix the DTC P0603?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Code Tech Notes

Start by charging the vehicle's battery and clean the terminal, once the battery is charged and the terminals are clean and secured, erase the code. If the code comes back ON, then you may have to reprogram or replace Engine Control Module (ECM) / Powertrain Control Module (PCM)

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0603 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

When is the Code Detected?

Indicates the Engine Control Module (ECM) / Powertrain Control Module (PCM) has experienced an internal memory fault.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Engine may not start

Code P0603 Description

Battery voltage is supplied to the Engine Control Module (ECM) / Powertrain Control Module (PCM) even when the ignition switch is turned OFF for the ECM/PCM memory function of the DTC memory, the air-fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc.

OBDII Code P0603 - Internal Control Module Keep Alive Memory Error - AutoCodes.com
P0603 Code - Internal Control Module Keep Alive Memory Error

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Code P0603 comments

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