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P0027moderate severityPowertrain

Exhaust Valve Control Solenoid Circuit Range/Performance Bank 1

on 2021 Mercedes-Benz EQC Electric · AWD

What this code means

The exhaust camshaft control solenoid on bank 1 is out of expected range. This disrupts variable valve timing and can cause drivability issues.

Symptoms

  • Rough idle
  • Loss of power
  • Check engine light on

Common causes

  • Stuck or dirty VVT solenoid
  • Low or contaminated oil
  • Faulty oil control valve
  • Wiring or connector fault

Diagnostic steps

  1. Retrieve fault codes
  2. Verify oil level and quality
  3. Test solenoid function and resistance
  4. Inspect circuit wiring

Other Powertrain codes on this vehicle

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