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.
Pinpoint Test Hf: Catalyst Efficiency Monitor And Exhaust Systems
2021 Ford Edge SE, 4WDSECTION Pinpoint Test Hf: Catalyst Efficiency Monitor And Exhaust Systems
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
Normal Operation and Fault Conditions
Refer to the DTC Fault Trigger Conditions.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| PCM P0420:00 | Catalyst System Efficiency Below Threshold (Bank 1): No Sub Type Information | Sets when PCM detects the bank 1 catalyst system efficiency is below the acceptable threshold. Under normal closed loop fuel conditions, high efficiency catalysts have oxygen storage capability. As catalyst efficiency deteriorates, its ability to store oxygen declines. Refer to the Catalyst Efficiency Monitor description for additional information. Diagnose any base engine concerns. Refer to the appropriate Engine article . |
| PCM P0430:00 | Catalyst System Efficiency Below Threshold (Bank 2): No Sub Type Information | Sets when PCM detects the bank 2 catalyst system efficiency is below the acceptable threshold. Under normal closed loop fuel conditions, high efficiency catalysts have oxygen storage capability. As catalyst efficiency deteriorates, its ability to store oxygen declines. Refer to the Catalyst Efficiency Monitor description for additional information. Diagnose any base engine concerns. Refer to the appropriate Engine article . |
Possible Sources
- HO2S2WD4WD circuitry concern
- Exhaust system concern
- Contaminated oil
- Base engine concern
- Fuel injector
- Turbocharger
- HO2S
PINPOINT TESTS HF: CATALYST EFFICIENCY MONITOR AND EXHAUST SYSTEMS (Gas)
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.