P1288 FORD Cylinder Head Temperature Sensor Out of Self-Test Range

Possible causes – Wrong thermostat – Not at operating range– Engine overheated– Low engine coolant level– Faulty Cylinder Head Temperature (CHT) sensor– Cylinder Head Temperature (CHT) sensor harness is open or shorted– Cylinder Head Temperature (CHT) sensor circuit poor electrical

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P1129 FORD Downstream Oxygen Sensors Swapped from Bank to Bank

Possible causes Crossed HO2S harness connectors (downstream)Crossed HO2S wiring at the harness connectors (downstream)Crossed HO2S wiring at the 104-pin harness connectors (downstream) Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1129 FORD Description The heated oxygen sensor

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