LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Acura >> 2003 >> 3.2CL Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Performance System Self-Diagnostics >> Diagnostic Tests >> DTC P0128 Or DTC P1486
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC P0128 Or DTC P1486

Code Definition

NOTE: If DTCs P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0300, P0301-P0306, P0335, P0336, P0401, P0505, P1106, P1107, P1108, P1128, P1129, P1259 or P1519 are also stored, troubleshoot these codes first. DTC P0128 can also set when hood is opened while engine is running.
  1. Check engine coolant level. If coolant level is okay, go to next step. If coolant is low, refill cooling system and repair leak.
  2. Turn ignition switch on. Check radiator fan. If radiator fan does not keep running, replace thermostat. If radiator fan keeps running, check radiator fan circuit, radiator fan switch circuit and radiator fan switch. See appropriate wiring diagram under ENGINE PERFORMANCE in WIRING DIAGRAMS. Repair as necessary. If circuits and components are okay, substitute known-good PCM, then recheck. If symptom or indication goes away, replace original PCM.
scientia non olet · About LEMON Manuals