Engine Control System - DTC Diagnostics (P1659 - U0047)

• DTC Troubleshooting
  • DTC P1659
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Power Supply (DBW_RLY_OUT) Circuit Inspection
      • Control (DBW_RLY_CL-) Circuit Inspection
      • PCM Inspection
  • DTC P1683
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Throttle Body Inspection
  • DTC P1684
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Throttle Body Inspection
  • DTC P16BB
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Power Supply (ACG_+B) Circuit Inspection
  • DTC P16E2 (2019 2020 2021 2022 2023 2024)
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Alternator Inspection
      • Shorted Parts Inspection (Connected to LIN (ACG) [ LIN ] Circuit)
      • Communication (LIN (ACG) [ LIN ]) Circuit Inspection
      • PCM Inspection
  • DTC P16E2 (2025)
    • Notes
    • ? Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • LIN(ACG) [LIN] Circuit Inspection
    • Component Connected to LIN(ACG) [LIN] Circuit Inspection
    • Alternator Inspection
    • Alternator Circuit Inspection
    • PCM Inspection
  • DTC P16E3
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Shorted Parts Inspection (Connected to LIN (METER) Circuit)
      • 12 Volt Battery Sensor Inspection
      • Power Supply (+B_BATT_SNSR), Signal (LIN (METER)) Circuit Inspection
      • Gauge Control Module Inspection
  • DTC P16E4
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
  • DTC P16E5
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • DC-DC Converter Inspection
      • Shorted Parts Inspection (Connected to LIN (ACG) [ LIN ] Circuit)
      • Power Supply (IG1_ACG), Communication (LIN (ACG)) Circuit Inspection
      • PCM Inspection
  • DTC P16E7 (2019 2020 2021 2022 2023 2024)
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • 12 Volt Battery Fan Motor Inspection
      • Shorted Parts Inspection (Connected to LIN (ACG) [ LIN ] Circuit)
      • Power Supply (IG1_OPTION), Communication (LIN (ACG)) Circuit Inspection
      • PCM Inspection
  • DTC P16E7 (2025)
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • IG1_OPTION, LIN(ACG) Circuit Inspection
    • Component Connected to LIN(ACG) Circuit Inspection
    • 12 Volt Battery Fan Motor Inspection
    • 12 Volt Battery Fan Motor Circuit Inspection
    • PCM Inspection
  • DTC P16F3
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Control (ST_CUT_RLY1_CL-) Circuit Inspection
      • Power Supply (IG1_START_CUT) Open Wire Inspection
      • PCM Inspection
  • DTC P16F4
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Control (ST_CUT_RLY2_CL-) Circuit Inspection
      • Power Supply (IG1_START_CUT) Open Wire Inspection
      • PCM Inspection
  • DTC P16F5
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Control (ST_CUT_RLY1_CL-) Shorted Wire Inspection
      • PCM Inspection
  • DTC P16F6
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Control (ST_CUT_RLY2_CL-) Shorted Wire Inspection
      • PCM Inspection
  • DTC P1AF0 (PGM-FI System) (2024 2025)
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • +B_IGP Circuit Inspection
    • FI_MAIN_RLY_OUT, FI_MAIN_RLY_CL- Open Wire Inspection
    • FI_MAIN_RLY_OUT Shorted Wire Inspection
    • Components Connected to FI_MAIN_RLY_OUT Circuit Inspection
    • PCM Inspection
  • DTC P1AF1 (PGM-FI System) (2024 2025)
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • +B_IGP Circuit Inspection
    • FI_MAIN_RLY_OUT, FI_MAIN_RLY_CL- Open Wire Inspection
    • FI_MAIN_RLY_OUT Shorted Wire Inspection
    • Components Connected to FI_MAIN_RLY_OUT Circuit Inspection
    • PCM Inspection
    • TCM Inspection
  • DTC P1AF2 (PGM-FI System) (2024 2025)
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
  • DTC P1AF3 (PGM-FI System) (2024 2025)
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • IG1 [IG1_RELAY_BOX] Open Wire Inspection
    • PCM Inspection
    • TCM Inspection
  • DTC P2073 (2019 2020)
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Intake Air System, PCV System, EVAP Canister Purge Valve Visual Inspection
  • DTC P2073 (2021 2022 2023 2024 2025)
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Intake Air System, PCV System, EVAP Canister Purge Valve Visual Inspection
  • DTC P2074 (2019 2020)
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
  • DTC P2074 (2021 2022 2023 2024 2025)
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
  • DTC P2096, P2097
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Cylinder A/F Variation Inspection
      • Exhaust System Visual Inspection
      • A/F Sensor (Sensor 1) Inspection
  • DTC P2101
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Throttle Body Inspection (Cleaning)
      • Throttle Body Component Inspection
      • Control (MTR1), Control (MTR2) Open Wire Inspection
      • PCM Inspection
  • DTC P2108
    • Notes
    • Overview
  • DTC P2118
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Throttle Body Component Inspection
      • Control (MTR1), Control (MTR2), GND (SG3) Circuit Inspection
      • PCM Inspection
  • DTC P2119
    • Notes
    • Overview
  • DTC P2121
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Accelerator Pedal Position (APP) Sensor Inspection
      • Power Supply (VCC4), Signal (APS1), GND (SG4) Circuit Inspection
      • PCM Inspection
  • DTC P2122
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Accelerator Pedal Position (APP) Sensor Inspection
      • Power Supply (VCC4), Signal (APS1) Circuit Inspection
      • PCM Inspection
  • DTC P2123
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Accelerator Pedal Position (APP) Sensor Inspection
      • GND (SG4) Open Wire Inspection
      • PCM Inspection
  • DTC P2126
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Accelerator Pedal Position (APP) Sensor Inspection
      • Power Supply (VCC5), Signal (APS2), GND (SG5) Circuit Inspection
      • PCM Inspection
  • DTC P2127
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Accelerator Pedal Position (APP) Sensor Inspection
      • Power Supply (VCC5), Signal (APS2) Circuit Inspection
      • PCM Inspection
  • DTC P2128
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Accelerator Pedal Position (APP) Sensor Inspection
      • GND (SG5) Open Wire Inspection
      • PCM Inspection
  • DTC P2135
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Signal (THL1), Signal (THL2) Shorted Wire Inspection
      • Throttle Body Component Inspection
      • PCM Inspection
  • DTC P2138
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Accelerator Pedal Position (APP) Sensor Functional Inspection
      • Accelerator Pedal Position (APP) Sensor Inspection
      • PCM Inspection
      • Signal (APS1), Signal (APS2) Shorted Wire Inspection
  • DTC P2148
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
  • DTC P2175 (2021 2022 2023 2024 2025)
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Intake Air Duct, Air Cleaner Housing Visual Inspection
      • Throttle Body Functional Inspection
      • MAP Sensor Functional Inspection (1)
      • MAP Sensor Functional Inspection (2)
      • Turbocharger Boost Sensor Functional Inspection (1)
      • Turbocharger Boost Sensor Functional Inspection (2)
      • MAF Sensor Functional Inspection
      • IAT Sensor 1 Functional Inspection
  • DTC P2176
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Control (MTR1), Control (MTR2) Open Wire Inspection
      • Throttle Body Inspection (Throttle Valve Stuck)
      • Throttle Body Inspection (Internal Circuit)
      • PCM Inspection
  • DTC P2182
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • ECT Sensor 2 Inspection
      • Signal (TW2_SENSOR [ TW2 ]), GND (SG6) Circuit Inspection
      • PCM Inspection
  • DTC P2183
    • Notes
    • Overview
    • Inspection Outline
    • Related Information
    • HDS Function
    • Inspection
      • Connector and Terminal Inspection
      • ECT Sensor 1 Functional Inspection
      • ECT Sensor 2 Functional Inspection
      • ECT Sensor 1, ECT Sensor 2 Inspection
  • DTC P2184
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • ECT Sensor 2 Inspection
      • Signal (TW2_SENSOR [ TW2 ]) Shorted Wire Inspection
      • PCM Inspection
  • DTC P2185
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • ECT Sensor 2 Inspection
      • Signal (TW2_SENSOR [ TW2 ]), GND (SG6) Open Wire Inspection
      • PCM Inspection
  • DTC P2195
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • MAF Sensor Visual Inspection
      • A/F Sensor (Sensor 1) Installation Inspection
      • PCM Inspection
  • DTC P2199
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Connector and Terminal Inspection (ECT Sensor 1, ECT Sensor 2, MAF Sensor/IAT Sensor 1, IAT Sensor 2)
  • DTC P219C, P219D, P219E, P219F
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Intake Manifold and Exhaust Manifold Visual Inspection
      • Injector Inspection
  • DTC P2226
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
  • DTC P2228
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
  • DTC P2229
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
  • DTC P2237
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • PCM Inspection
      • Signal (IP) Open Wire Inspection
      • A/F Sensor (Sensor 1) Inspection
  • DTC P2238
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Signal (IP) Shorted Wire Inspection
      • A/F Sensor (Sensor 1) Inspection
      • PCM Inspection
  • DTC P2243
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • PCM Inspection
      • Signal (VCENT) Open Wire Inspection
      • A/F Sensor (Sensor 1) Inspection
  • DTC P2245
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • PCM Inspection
      • Signal (VCENT) Shorted Wire Inspection
      • A/F Sensor (Sensor 1) Inspection
  • DTC P2251
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • PCM Inspection
      • Signal (VS) Open Wire Inspection
      • A/F Sensor (Sensor 1) Inspection
  • DTC P2252
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Signal (VS) Shorted Wire Inspection
      • A/F Sensor (Sensor 1) Inspection
      • PCM Inspection
  • DTC P2270
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
  • DTC P2279
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Intake Air System, PCV System, EVAP System Visual Inspection
  • DTC P2421 (2020 2021 2022 2023 2024 2025)
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • EVAP Canister Vent Hose Inspection
      • EVAP Canister Purge Line Visual Inspection
      • Fuel Fill Pipe and Fuel Tank Vapor Recirculation Tube Visual Inspection
      • EVAP Canister Purge Valve Inspection
      • EVAP Canister Purge Line Inspection
      • EVAP Canister Vent Shut Valve Inspection
      • Shut-Off Valve Inspection
      • Shut-Off Valve Seal Inspection
      • Fuel Tank Inspection
  • DTC P2450
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
  • DTC P2506 (2024 2025)
    • Notes
    • Overview
  • DTC P2508 (2024 2025)
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
  • DTC P2563
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Turbocharger Wastegate Control Actuator Position Sensor Inspection
      • Power Supply (VCC2), Signal (WGL), GND (SG2) Circuit Inspection
      • PCM Inspection
  • DTC P2564
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Turbocharger Wastegate Control Actuator Position Sensor Inspection
      • Control (VCC2), Signal (WGL) Circuit Inspection
      • PCM Inspection
  • DTC P2565
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Turbocharger Wastegate Control Actuator Position Sensor Inspection
      • Signal (WGL), GND (SG2) Open Wire Inspection
      • PCM Inspection
  • DTC P25DF (2022 2023 2024 2025)
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • VTC System Oil Passage Inspection
  • DTC P25E5 (2022 2023 2024 2025)
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • VTC System Oil Passage Inspection
  • DTC P2610
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
  • DTC P2623
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • High Pressure Fuel Pump Component Inspection
      • Power Supply (INJ_RLY_OUT) Circuit Inspection
      • Control (FI_MAIN_RLY_CL-) Circuit Inspection
      • Control (HPUMP H), Control (HPUMP L) Circuit Inspection
      • PCM Inspection
  • DTC P2651
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Rocker Arm Oil Pressure Sensor Inspection
      • VTEC System Oil Passage Inspection
      • Rocker Arm Oil Control Valve Inspection
  • DTC P2652
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Rocker Arm Oil Pressure Sensor Inspection
      • VTEC System Oil Passage Inspection
      • Rocker Arm Oil Control Valve Inspection
  • DTC P2653
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Rocker Arm Oil Control Solenoid Inspection
      • Control (VTS2) Shorted Wire Inspection
      • PCM Inspection
  • DTC P2654
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Rocker Arm Oil Control Solenoid Inspection
      • Control (VTS2), GND (PG) Open Wire Inspection
      • PCM Inspection
  • DTC P26E5 (2025)
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • IG1_START_CUT Circuit Inspection
    • ST_CUT_RLY2_CL- Circuit Inspection
    • PCM Inspection
  • DTC P26E6 (2025)
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • ST_CUT_RLY2_CL- Shorted Wire Inspection
  • DTC P26F0 (2025)
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • START_DIAG [ST_CUT_RLY_COM], ST_CUT_RLY1_CL- Shorted Wire Inspection
    • PCM Inspection
  • DTC P26F2 (2025)
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • START_DIAG [ST_CUT_RLY_COM], ST_CUT_RLY2_CL- Shorted Wire Inspection
    • PCM Inspection
  • DTC P2A00
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
  • DTC P2A01
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Secondary HO2S (Sensor 2) Inspection
      • GND (SO2_SG [ SO2SG ]), Signal (SO2) Shorted Wire Inspection
      • PCM Inspection
  • DTC P2B08, P2B09, P2B0A, P2B0B (2021 2022 2023 2024 2025)
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
  • DTC P2DE0 (2021 2022 2023 2024 2025)
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
  • DTC P2DE1 (2021 2022 2023 2024 2025)
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
  • DTC U0029 (PGM-FI System)
    • Notes
    • Overview
  • DTC U0047 (PGM-FI System)
    • Notes
    • Overview