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2004 Jeep Grand Cherokee Laredo 4.0L MIL Lamp on
tester 02 heater circuit resistance on both upstream o2 sensors. ho2s11 5.2 ohm ho2s21 4.3 ohms. tested circuit with load light both circuits show 3 amps and then duty cycles heater circuit w/ 3a each cycle. replaced ho2s11 with denso sensor 4.2 ohms heater ci...
FIX posted 6/8/2009
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Message Closed w/FIX
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4 Replies Received
Related Documents & Media | VIN | 1J4GW48S54 |
| Engine | 4.0 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Not Applicable |
Trouble Codes
| P0031 | Heated Oxygen Sensor (Bank 1 Sensor 1) Heater Circuit Low Voltage |
Message Closed w/FIX
Vehicle Data
2004 Jeep Grand Cherokee Laredo
| VIN | 1J4GW48S54 |
| Engine | 4.0 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Not Applicable |
Trouble Codes
| P0031 | Heated Oxygen Sensor (Bank 1 Sensor 1) Heater Circuit Low Voltage |
Video