DTC Detection Logic
WARNING: This page is about a different car, the 2019 Nissan NV3500 HD, 2019 Nissan NV2500 HD, and 2019 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.
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DTC No.
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Trouble diagnosis name
(Trouble diagnosis content)
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DTC detecting condition
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Possible cause
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P0603
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ECM BACK UP CIRCUIT
[Internal control module keep alive memory (KAM) error]
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- Malfunction in the internal back up RAM of ECM.
- Malfunction in the internal EEP-ROM system of ECM.
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