P2621 – Injector Control Circuit Low

Description

The ECM detects a low signal in the injector control circuit.

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Symptoms

  • Misfire
  • Poor acceleration
  • Check engine light

Causes

  • Weak injector
  • Wiring short to ground
  • ECM issue

Diagnosis

  • Test injector
  • Inspect wiring
  • Check ECM

Repair

  • Replace injector
  • Repair wiring

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