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2010 BMW M3 E90
4.0L V8 S65•RWD•DCT•gas•S65B40
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Repairs0Labor493Torque3437Fluid8DTC1459Battery1Maintenance0Recalls0
P3015moderate severityPowertrain

Intake Valve Control Solenoid Circuit Intermittent Bank 1

on 2010 BMW M3 E90 4.0L V8 S65 · RWD

What this code means

The intake valve control solenoid on Bank 1 has an intermittent electrical fault. Continuous VVT systems use this solenoid to control cam phasing oil flow.

Symptoms

  • Check Engine Light comes and goes
  • Intermittent rough idle
  • Sporadic power loss
  • Variable valve noise
  • Inconsistent fuel economy

Common causes

  • Loose solenoid connector
  • Wiring chafing against engine
  • Solenoid internal intermittent failure
  • Thermal expansion causing contact loss
  • Corroded pins

Diagnostic steps

  1. Monitor VVT solenoid command vs cam position
  2. Wiggle test on solenoid connector
  3. Inspect wiring harness routing
  4. Check connector pin tension
  5. Test solenoid at operating temperature

Repair notes

Repair connector or replace VVT solenoid. Re-route wiring away from heat sources.

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