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2008 Jeep Grand Cherokee Limited 4.7L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on
Fuel pressure normal. Tested for vacuum leaks. None found. Observed O2 readings in my solus pro scan tool and O2 readings are close to desired voltage. Most of the time it is pretty smooth. At other times appears to have a dead miss. Cannot pinpoint any cylind...
FIX posted 7/15/2010
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Related Documents & Media | VIN | 1J8HR58N58 |
| Engine | 4.7 L / 8 cyl / GAS |
| Trans | 5-speed Automatic (Electronic) |
| Delivery | Fuel Injection |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp On |
| Occurs | Always, Cold, Hot, Intermittently |
Trouble Codes
| P0132 | Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit High Voltage |
| P0138 | Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage |
| P0300 | Multiple Misfire Detected |
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Vehicle Data
2008 Jeep Grand Cherokee Limited
| VIN | 1J8HR58N58 |
| Engine | 4.7 L / 8 cyl / GAS |
| Trans | 5-speed Automatic (Electronic) |
| Delivery | Fuel Injection |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp On |
| Occurs | Always, Cold, Hot, Intermittently |
Trouble Codes
| P0132 | Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit High Voltage |
| P0138 | Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage |
| P0300 | Multiple Misfire Detected |
Video