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MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L> 13B-265 TROUBLESHOOTING HINTS (The most likely • Right bank side catalytic converter deteriorated. • Right bank heated oxygen sensor failed. • PCM failed. DIAGNOSIS Required Special Tools STEP 1. Check the exhaust leaks. Q: Are there any abnormalities? YES : Go to Step 2. STEP 2. Using scan tool MB991502, check data list item 69: CAUTION To prevent damage to scan tool MB991502, always turn the 69, Heated Oxygen Sensor Bank 1, Sensor 2 (right rear). • Warming up the engine. When the engine is revved, the (4) Turn the ignition switch to the "LOCK"(OFF) position. Q: Is the sensor operating properly? YES : Go to Step 3. − O 2 Sensor Circuit Malfunction (bank 1 sensor 2)( ), DTC P0139 − O 2 Sensor Circuit Slow Response (bank 1 sensor ). STEP 3. Using scan tool MB991502, check data list item 39: 39, Heated Oxygen Sensor Bank 1, Sensor 1 (right front). • Warming up the engine. When the engine is revved, the (3) Turn the ignition switch to the "LOCK"(OFF) position. Q: Is the sensor operating properly? YES : Go to Step 4. − O 2 Sensor Circuit Malfunction (bank 1 sensor 1)( ), DTC P0133 − O 2
Sensor Circuit Slow Response (bank 1 sensor ). AC003081 AB 16 PIN MB991502 AC003081 AB 16 PIN MB991502 |