Nissan: MIL On With Code P0603 Stored For ECM Back Up Circuit
Step 1: Confirm that the battery voltage is 11 volts or more, with the ignition on and engine off.
Volkswagen Tech Tip: DTC P0401, Followed By P2463, Due To High Soot Loads Before Regeneration Cycle
The car owner may complain that the MIL light is on. When the codes are scanned, code P0401 Exhaust Gas Recirculation Flow Insufficient and P2463 DPF Soot Accumulation will be stored in the ECM.
