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.
( + ) HO2S12 Connector, Harness Side | ( - ) HO2S12 Connector, Harness Side |
|---|---|
HO2S12 | SIGRTN |
HO2S12 | VPWR |
HO2S12 | HTR12 |
• For HO2S22,
• HO2S22 connector disconnected.
• Measure the resistance between:
( + ) HO2S22 Connector, Harness Side | ( - ) |
|---|---|
HO2S22 | Ground |
• Measure the resistance between:
( + ) HO2S22 Connector, Harness Side | ( - ) HO2S22 Connector, Harness Side |
|---|---|
HO2S22 | SIGRTN |
HO2S22 | VPWR |
HO2S22 | HTR22 |
Are the resistances greater than 10K ohms?
Yes | No |
|---|---|
GO to H27 . | REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test. |
H27 CHECK THE HO2S CIRCUIT FOR AN OPEN
• For HO2S12,
• Measure the resistance between:
( + ) HO2S12 Connector, Harness Side | ( - ) PCM Connector, Harness Side |
|---|---|
HO2S12 | HO2S12 |
SIGRTN | SIGRTN |
HTR12 | HTR12 |
VPWR | VPWR |
• For HO2S22,
• Measure the resistance between:
( + ) HO2S22 Connector, Harness Side | ( - ) PCM Connector, Harness Side |
|---|---|
HO2S22 | HO2S22 |
SIGRTN | SIGRTN |
HTR22 | HTR22 |
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.