P1605 – Mazda DTC

Mazda DTC P1605 – Powertrain Control Module Keep Alive Memory Test Error

DTC P1605 meaning on Mazda

DTC P1605 on a Mazda refers to a Powertrain Control Module (PCM) Keep Alive Memory (KAM) Test Error. This diagnostic trouble code indicates that there is an issue with the PCM’s ability to retain certain memory functions during self-tests.

Mazda DTC P1605 symptoms

Symptoms of DTC P1605 on a Mazda may include:

• Check Engine Light illuminated
• Engine performance issues
• Difficulty starting the vehicle

Mazda DTC P1605 causes

Common causes of DTC P1605 on a Mazda include:

• PCM software issues
• PCM hardware failure
• Electrical wiring problems

Mazda DTC P1605 seriousness

The seriousness of DTC P1605 on a Mazda can vary. While it may not always result in immediate drivability issues, it is important to address this code promptly to prevent potential long-term damage to the vehicle’s systems.

How to diagnose DTC P1605 on Mazda

To diagnose DTC P1605 on a Mazda, a mechanic may perform the following steps:

1. Use a diagnostic scanner to retrieve the trouble codes
2. Inspect the PCM for any visible damage
3. Check the PCM power and ground connections
4. Perform a KAM test to verify the PCM’s memory retention

How to fix DTC P1605 on Mazda

To fix DTC P1605 on a Mazda, the following steps may be taken:

1. Update the PCM software if applicable
2. Replace the PCM if it is determined to be faulty
3. Repair any damaged wiring or connections

How to erase DTC P1605 on Mazda

To erase DTC P1605 on a Mazda, the code can be cleared using a diagnostic scanner. After addressing the underlying issue that caused the code, the scanner can be used to clear the code from the PCM’s memory.