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ford escort p0420


P FORD Meaning The Engine Control Module monitors the switching frequency ratio of heated oxygen sensors 1 (front O2 sensor) and heated oxygen sensors 2 (rear O2 sensor).A three way catalyst converter (Manifold) with high oxygen storage capacity will indicate a low switching frequency of heated oxygen sensor 2.

P Ford Description The Engine Control Module monitors the switching frequency ratio of heated oxygen sensors 1 (front O2 sensor) and heated oxygen sensors 2 (rear O2 sensor).A three way catalyst converter (Manifold) with high oxygen storage capacity will indicate a low switching frequency of heated oxygen sensor 2.

Ford P OBD-II Trouble Code Definition: P Catalyst System Efficiency Below Threshold Bank 1 P Ford OBD-II Trouble CodeDescription: OBD Trouble Code Ford Escort Concept Ford Escape Ford EcoSport Ford C-MAX Hybrid Ford C-MAX Energi Ford B-MAX Ford Atlas Concept.

Dec 16,  · I have a 99 Ford Escort with a split-port 4-banger (not original motor) that has been giving us some problems. Several days ago, it quit running. Trouble codes are P (idle air control overspeed error), P (system too lean - bank 1) and P (catalyst system efficiency below threshold - Bank 1).