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2017 CHEVROLET SILVERADO 1500
5.3L V8 EcoTec3 L83•RWD•AUTOMATIC•gas
6 active safety recalls on this vehicle — view recalls
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Repairs421Labor499Torque4352Fluid8DTC1251Battery1Maintenance0Recalls6
P1628moderate severityPowertrain

ECT Pull-Up Resistor

on 2017 Chevrolet Silverado 1500 5.3L V8 EcoTec3 L83 · RWD

What this code means

The PCM detected a fault in the engine coolant temperature sensor pull-up resistor circuit. This can cause inaccurate temperature readings.

Symptoms

  • Check engine light on
  • Poor cold start performance
  • Incorrect temperature gauge reading

Common causes

  • Faulty PCM
  • ECT sensor circuit fault
  • Wiring or connector problems
  • Corroded ECT connector

Diagnostic steps

  1. Scan for ECT-related codes
  2. Inspect ECT sensor and wiring
  3. Measure ECT signal voltage
  4. Repair wiring or replace PCM as needed
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🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Mechanic · 20+ years. Spot an error? Use the Help link above — a human reads every report.
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