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.
DZ26 CHECK THE RESISTANCE OF THE LABEL RESISTOR IN THE UNIVERSAL HO2S
• Measure the resistance between:
( + ) Universal HO2S Connector, Component Side | ( - ) Universal HO2S Connector, Component Side |
|---|---|
UO2SPCT | VPWR |
Is the resistance between 3.5K - 999.9K ohms?
Yes | No |
|---|---|
For DTCs P164A or P164B, unable to duplicate or identify the concern at this time. GO to Pinpoint Test Z . For DTCs P2627, P2628, P2630 or P2631, GO to DZ28 . | INSTALL a new Universal HO2S. REFER to the Workshop Manual Section 303- 14, Electronic Engine Controls. RESET the keep alive memory (KAM), REFER to Section 2, Resetting The Keep Alive Memory (KAM). REPEAT the self-test. |
DZ27 CHECK THE RESISTANCE OF THE CURRENT TRIM RESISTOR IN THE UNIVERSAL HO2S
• Measure the resistance between:
( + ) Universal HO2S Connector, Component Side | ( - ) Universal HO2S Connector, Component Side |
|---|---|
UO2SPCT | UO2SPC |
Is the resistance between 25 - 330 ohms?
Yes | No |
|---|---|
For DTCs P2626 or P2629, GO to DZ28 . For all others, RETURN to Section 3, No Diagnostic Trouble Codes (DTCs) Present Symptom Chart Index for further direction. | INSTALL a new Universal HO2S. REFER to the Workshop Manual Section 303-14, Electronic Engine Controls. RESET the keep alive memory (KAM), REFER to Section 2, Resetting The Keep Alive Memory (KAM). REPEAT the self-test. |
DZ28 CHECK FOR CORRECT PCM OPERATION
• Disconnect all the PCM connectors.
• Visually inspect for:
◾ pushed out pins
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.