66 PPL 1666 HO2S High Signal [Bank 2 Sensor 1] 67 -- -- Not Used 68 PPL/WHT 1668 HO2S High Signal [Bank 1 Sensor 2] 69 PPL/WHT 1665 HO2S High Signal [Bank 1 Sensor 1] 70 BRN 1174 Oil Level Switch Signal 71-72 -- -- Not Used 73 BRN/WHT 633 CMP Sensor Signal Pin "A" 74 YEL 410 ECT Sensor Signal Pin "B"