Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSACURA2023MDX BASEREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM DTC DIAGNOSTICS (P219C - U0101)
2023 Acura MDX Base
Engine Control System DTC Diagnostics (P219C - U0101)
2023 Acura MDX BaseSECTION Engine Control System DTC Diagnostics (P219C - U0101)
- Troubleshooting
- DTC Troubleshooting: P219C, P219D, P219E, P219F, P21A0, P21A1 (3.0L Engine)
- DTC Troubleshooting: P2226 (3.0L Engine)
- DTC Troubleshooting: P2226 (3.5L Engine)
- DTC Troubleshooting: P2228 (3.0L Engine)
- DTC Troubleshooting: P2228 (3.5L Engine) (2022 2023 2024)
- DTC Troubleshooting: P2228 (3.5L Engine) (2025)
- DTC Troubleshooting: P2229 (3.0L Engine)
- DTC Troubleshooting: P2229 (3.5L Engine) (2022 2023 2024)
- DTC Troubleshooting: P2229 (3.5L Engine) (2025)
- DTC Troubleshooting: P2237, P2240 (3.0L Engine)
- DTC Troubleshooting: P2237, P2240 (3.5L Engine)
- DTC Troubleshooting: P2238, P2241 (3.0L Engine)
- DTC Troubleshooting: P2238, P2241 (3.5L Engine)
- DTC Troubleshooting: P2239, P2242 (3.0L Engine)
- DTC Troubleshooting: P2243, P2247 (3.5L Engine)
- DTC Troubleshooting: P2245, P2249 (3.5L Engine)
- DTC Troubleshooting: P2251, P2254 (3.5L Engine)
- DTC Troubleshooting: P2252, P2255 (3.0L Engine)
- DTC Troubleshooting: P2252, P2255 (3.5L Engine)
- DTC Troubleshooting: P2253, P2256 (3.0L Engine)
- DTC Troubleshooting: P2270 (3.0L Engine)
- DTC Troubleshooting: P2270, P2272 (3.5L Engine)
- DTC Troubleshooting: P2279 (3.0L Engine)
- DTC Troubleshooting: P2279 (3.5L Engine)
- DTC Troubleshooting: P2400 (3.0L Engine)
- Notes
- Overview
- Inspection Outline
- Confirmation Procedure
- Related Information
- HDS Function
- IGPS (PCS) [IGPS (LAF) ] Open Wire Inspection
- IGPS (PCS) [IGPS (LAF) ] Shorted Wire Inspection
- +B_FML_MAIN2 Circuit Inspection
- FI_SUB_RLY_CL- Circuit Inspection
- ELMP_LO Open Wire Inspection
- EVAP Leak Check Module Inspection
- Power Distribution Module Inspection
- PCM Inspection
- DTC Troubleshooting: P2401 (3.0L Engine)
- DTC Troubleshooting: P2402 (3.0L Engine)
- DTC Troubleshooting: P2413 (3.5L Engine)
- DTC Troubleshooting: P2421 (3.5L Engine)
- Notes
- Overview
- Inspection Outline
- Confirmation Procedure
- Related Information
- HDS Function
- EVAP Canister Vent Hose Inspection
- EVAP Canister Purge Valve Inspection
- EVAP Canister Purge Line Visual Inspection
- EVAP Canister Purge Line Inspection
- EVAP Canister Vent Shut Valve Inspection
- Fuel Fill Pipe and Fuel Tank Vapor Recirculation Tube Visual Inspection
- Shut-Off Valve Inspection
- Shut-Off Valve Seal Inspection
- Fuel Tank Inspection
- DTC Troubleshooting: P2450 (3.0L Engine)
- DTC Troubleshooting: P24B9 (3.0L Engine)
- DTC Troubleshooting: P24BA (3.0L Engine)
- DTC Troubleshooting: P24BB (3.0L Engine)
- DTC Troubleshooting: P24BD (3.0L Engine)
- Notes
- Overview
- Inspection Outline
- Confirmation Procedure
- Related Information
- HDS Function
- Canister Change Over Valve Component Inspection
- IGPS (PCS) [IGPS (LAF) ] Open Wire Inspection
- IGPS (PCS) [IGPS (LAF) ] Shorted Wire Inspection
- +B_FML_MAIN2 Circuit Inspection
- FI_SUB_RLY_CL- Circuit Inspection
- VSV Open Wire Inspection
- Power Distribution Module Inspection
- PCM Inspection
- DTC Troubleshooting: P24BE (3.0L Engine)
- DTC Troubleshooting: P24BF (3.0L Engine)
- DTC Troubleshooting: P24C0 (3.0L Engine)
- DTC Troubleshooting: P2506 (3.5L Engine) (2025)
- DTC Troubleshooting: P2508 (3.5L Engine) (2025)
- DTC Troubleshooting: P2564 (3.0L Engine)
- DTC Troubleshooting: P2565 (3.0L Engine)
- DTC Troubleshooting: P2598 (3.0L Engine)
- DTC Troubleshooting: P2599 (3.0L Engine)
- DTC Troubleshooting: P2610 (3.5L Engine)
- DTC Troubleshooting: P2623 (3.0L Engine)
- DTC Troubleshooting: P2623 (3.5L Engine)
- DTC Troubleshooting: P2646 (3.5L Engine)
- DTC Troubleshooting: P2647 (3.5L Engine)
- DTC Troubleshooting: P2648 (3.5L Engine)
- DTC Troubleshooting: P2649 (3.5L Engine)
- DTC Troubleshooting: P2651 (3.0L Engine)
- DTC Troubleshooting: P2651 (3.5L Engine)
- DTC Troubleshooting: P2652 (3.0L Engine)
- DTC Troubleshooting: P2652 (3.5L Engine)
- DTC Troubleshooting: P2653 (3.0L Engine)
- DTC Troubleshooting: P2653 (3.5L Engine)
- DTC Troubleshooting: P2654 (3.0L Engine)
- DTC Troubleshooting: P2654 (3.5L Engine)
- DTC Troubleshooting: P2656 (3.5L Engine)
- DTC Troubleshooting: P2657 (3.5L Engine)
- DTC Troubleshooting: P2658 (3.5L Engine)
- DTC Troubleshooting: P2659 (3.5L Engine)
- DTC Troubleshooting: P26E5 (3.0L Engine) (2025)
- DTC Troubleshooting: P26E5 (3.5L Engine) (2025)
- DTC Troubleshooting: P26E6 (3.0L Engine) (2025)
- DTC Troubleshooting: P26E6 (3.5L Engine) (2025)
- DTC Troubleshooting: P26F0 (3.0L Engine) (2025)
- DTC Troubleshooting: P26F0 (3.5L Engine) (2025)
- DTC Troubleshooting: P26F2 (3.0L Engine) (2025)
- DTC Troubleshooting: P26F2 (3.5L Engine) (2025)
- DTC Troubleshooting: P2A00, P2A03 (3.5L Engine)
- DTC Troubleshooting: P2A01, P2A04 (3.5L Engine)
- Notes
- Overview
- Inspection Outline
- Confirmation Procedure
- Related Information
- HDS Function
- Secondary HO2S (Sensor 2) Inspection - For DTC P2A01: Rear Secondary HO2S (Bank 1, Sensor 2)
- Secondary HO2S (Sensor 2) Inspection - For DTC P2A04: Front Secondary HO2S (Bank 2, Sensor 2)
- SO2, SO2SG Shorted Wire Inspection - For DTC P2A01: SO2B1, SO2SGB1
- SO2, SO2SG Shorted Wire Inspection - For DTC P2A04: SO2B2, SO2SGB2
- PCM Inspection
- DTC Troubleshooting: P2B08, P2B09, P2B0A, P2B0B, P2B0C, P2B0D (3.0L Engine)
- Notes
- Overview
- Inspection Outline
- Confirmation Procedure
- Related Information
- HDS Function
- Injector Component Inspection
- +B_INJ, INJ_RLY_OUT, FI_MAIN_RLY_CL- Circuit Inspection
- INJH, INJL Circuit Inspection - For DTC P2B08: INJH1, INJL1, INJH5, INJL5
- INJH, INJL Circuit Inspection - For DTC P2B09: INJH2, INJL2, INJH6, INJL6
- INJH, INJL Circuit Inspection - For DTC P2B0A: INJH3, INJL3, INJH4, INJL4
- INJH, INJL Circuit Inspection - For DTC P2B0B: INJH4, INJL4, INJH3, INJL3
- INJH, INJL Circuit Inspection - For DTC P2B0C: INJH5, INJL5, INJH1, INJL1
- INJH, INJL Circuit Inspection - For DTC P2B0D: INJH6, INJL6, INJH2, INJL2
- PCM Inspection
- DTC Troubleshooting: P2B08, P2B09, P2B0A, P2B0B, P2B0C, P2B0D (3.5L Engine)
- DTC Troubleshooting: P2DE0, P2DE2 (3.5L Engine) (2022 2023 2024)
- DTC Troubleshooting: P2DE0, P2DE2 (3.5L Engine) (2025)
- DTC Troubleshooting: P2DE1, P2DE3 (3.5L Engine) (2022 2023 2024)
- DTC Troubleshooting: P2DE1, P2DE3 (3.5L Engine) (2025)
- DTC Troubleshooting: U0029 (PGM-FI System (3.0L Engine))
- DTC Troubleshooting: U0029 (PGM-FI System (3.5L Engine))
- DTC Troubleshooting: U0038 (PGM-FI System (3.0L Engine)) (2022 2023 2024)
- DTC Troubleshooting: U0038 (PGM-FI System (3.0L Engine)) (2025)
- DTC Troubleshooting: U0038 (PGM-FI System (3.5L Engine)) (2022 2023 2024)
- DTC Troubleshooting: U0047 (PGM-FI System (3.0L Engine)) (2022 2023 2024)
- DTC Troubleshooting: U0047 (PGM-FI System (3.0L Engine)) (2025)
- DTC Troubleshooting: U0047 (PGM-FI System (3.5L Engine)) (2022 2023 2024)
- DTC Troubleshooting: U0047 (PGM-FI System (3.5L Engine)) (2025)
- DTC Troubleshooting: U0101 (PGM-FI System (3.0L Engine)) (2022 2023 2024)
- DTC Troubleshooting: U0101 (PGM-FI System (3.0L Engine)) (2025)
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.