P30D5 – NOx Sensor 3 Signal Message Counter Incorrect

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What does ODBII Code P30D5 Mean?

Powertrain Control Module(PCM), Engne Control Module(ECM) or Engine Control Unit (ECU) is receiving an incorrect NOx sensor signal.

Code P30D5 Possible Causes

  • Faulty NOx Sensor 3
  • NOx Sensor 3 circuit poor electrical connection
  • NOx Sensor 3 harness is open or shorted
  • Faulty Powertrain Control Module
  • Low battery voltage

Need help with this code? Our mechanics are available within west Michigan to help. Outside of our service area? Visit our Car Help Section where you can ask questions and get answers.

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