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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) 13A-497 STEP 2. Using scan tool MB991958, check data list item 69: CAUTION To prevent damage to scan tool MB991958, always turn the 69, Heated Oxygen Sensor Bank 1, Sensor 2 (right rear). • Warm up the engine. When the engine is revved, the output voltage should repeat 0 volt and 0.6 to 1.0 volt (4) Turn the ignition switch to the "LOCK" (OFF) position. YES : Go to Step 3. − Heated Oxygen Sensor Circuit (bank 1, sensor 2) , DTC P0137 − Heated Oxygen Sensor Circuit low voltage (bank 1, sensor 2) , DTC P0138 − Heated Oxygen Sensor Circuit High Voltage (bank 1, sensor 2) DTC P0139 − Heated Oxygen Sensor Circuit Slow Response (bank 1, sensor 2) STEP 3. Using scan tool MB991958, check data list item 39: 39, Heated Oxygen Sensor Bank 1, Sensor 1 (right front). • Warm up the engine. When the engine is revved, the output voltage should measure 0.6 to 1.0 volt. (3) Turn the ignition switch to the "LOCK" (OFF) position. YES : Go to Step 4. − Heated Oxygen Sensor Circuit (bank 1, sensor 1) , DTC P0131 − Heated Oxygen Sensor Circuit low voltage (bank 1, sensor 1) , DTC P0132 − Heated Oxygen Sensor Circuit High Voltage (bank 1, sensor 1) DTC P0133 − Heated Oxygen Sensor Circuit Slow Response (bank 1, sensor 1) , DTC P0134 − Heated Oxygen Sensor No Activity Detected (bank 1, sensor 1) AK303629AB MB991911 MB991827 MB991824 16-PIN AK303629AB MB991911 MB991827 MB991824 16-PIN |