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2016 workshop · Powertrain Control-Emissions Diagnosis

DW: Heated Oxygen Sensor (HO2S) DW: Introduction

Powertrain Control-Emissions Diagnosis

Ford gasoline diagnostic supplementReference 5,074 / 6,619HTML edition

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Vehicle applicability: This diagnostic supplement covers multiple Ford vehicles and engines. Follow the application named in the source below. Some references apply to vehicles other than Mustang.

REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

DW10 CHECK THE HO2S CIRCUIT FOR A SHORT

• For HO2S11,

• Measure the resistance between:

( + ) HO2S11 Connector, Harness Side	( - ) HO2S11 Connector, Harness Side
HO2S11	SIGRTN
HO2S11	VPWR

• Measure the resistance between:

( + ) HO2S11 Connector, Harness Side	( - )
HO2S11	Ground

• For HO2S12,

• Measure the resistance between:

( + ) HO2S12 Connector, Harness Side	( - ) HO2S12 Connector, Harness Side
HO2S12	SIGRTN
HO2S12	VPWR

• Measure the resistance between:

( + ) HO2S12 Connector, Harness Side	( - )
HO2S12	Ground

• For HO2S22,

• Measure the resistance between:

( + ) HO2S22 Connector, Harness Side	( - ) HO2S22 Connector, Harness Side
HO2S22	SIGRTN
HO2S22	VPWR

• Measure the resistance between:

( + ) HO2S22 Connector, Harness Side	( - )
HO2S22	Ground

Are the resistances greater than 10K ohms?

Yes	No
GO to DW11 .

Source reference 5074

2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.