P1237 – Fuel Pump Control Module High Input (Nissan)

Description

The ECM detected a high input signal from the fuel pump control module.

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Symptoms

  • Rich mixture
  • Rough idle

Causes

  • Short to power
  • Faulty module

Diagnosis

  • Check wiring for shorts
  • Inspect module

Repair

  • Repair wiring
  • Replace module