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P0662

Intake Manifold Tuning Valve Control Circuit High Bank 1

Same as P0660 with the control line shorted to supply. The intake manifold runner control (IMRC) flaps tune intake geometry for filling efficiency across the rpm range; stuck flaps cost part-load torque and can set lean codes.

  • Check engine light: Yes
  • Emissions related: Yes
  • Repair difficulty: medium

Symptoms

  • Check engine light on
  • Possible limp mode or no-start
  • Multiple follow-up faults across modules
  • Reset/relearn may be needed after repair

Common causes

Ordered by how often each turns out to be the cause.

  • Control line shorted to supplyCommon
  • Connector pins corroded - high contact resistanceLess likely
  • Supply wire pinched against B+ sourceLess likely

Parts involved

  • Intake Manifold Tuning Valve B1

P0662 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.