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2025 RIVIAN EDV 500
Dual Motor AWD (EDV)•AWD•ev
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Repairs276Labor323Torque97Fluid5DTC1479Battery1Maintenance0Recalls0
P0422moderate severityPowertrain

Main Catalyst Efficiency Below Threshold (Bank 1)

on 2025 Rivian EDV 500 Dual Motor AWD (EDV) · AWD

What this code means

The PCM determined the main catalytic converter on bank 1 is not reducing emissions efficiently. This is usually judged by comparing upstream and downstream oxygen sensor readings.

Symptoms

  • Check engine light on
  • Failed emissions test
  • Reduced fuel economy

Common causes

  • Failed catalytic converter
  • Faulty downstream O2 sensor
  • Exhaust leak
  • Engine misfire or fuel issue

Diagnostic steps

  1. Scan and confirm P0422
  2. Compare upstream and downstream O2 data
  3. Inspect exhaust for leaks
  4. Test catalyst efficiency
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