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P0140 Diagnostic Trouble Code Discussion for May 2004

Heated Oxygen Sensor (Bank 1 Sensor 2) Insufficient Activity

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Trouble Ticket Help Requests for DTC P0140
Help Request Posted
1998 Volvo V70 GLT 2.4L MIL Lamp on VIN: YV1LW5648W
P0140: No O2 Activity Bank 1 Sensor 2. This car is turning on the MIL on a regular Basis, both O2 sensors seem to operate correctly, the sensors are kind of expensive, so I would appreciate any help from someone who has experienced this problem before, there is a TSB for replacement sensors and a s...
May 03, 2004
2000 Nissan Maxima GLE 3.0L MIL Lamp on VIN: JN1CA31A2Y
P0140: Heated Oxygen Sensor (Bank 1 Sensor 2) Insufficient Activity Detected. ... Maxima came in first with a P0138. O2 [...]-2. After testing, we replaced and retested. All ok. Two days later, car was back with P0140. Basicly the same code if you read the diagnostic tree. Retested all circuits, cleaned connections, and drove through tw...
May 15, 2004
1997 Saturn SC1 1.9L MIL Lamp on
P0140: Heated Oxygen Sensor (Bank 1 Sensor 2) Insufficient Activity. ... rear O2 code returns (p0140). Replaced rear O2 sensor, and inspected wiring for damage. Scanner does show voltage movement in shop, after 1-2 days driving, the MIL on again. Believe we just have a bad cat, but other FIX posts show ignition switch problems,...
May 19, 2004
1996 Pontiac Grand Am SE 3.1L MIL Lamp on VIN: 1G2NE52M5T
P0140: Heated Oxygen Sensor (Bank 1 Sensor 2) Insufficient Activity. Car keeps setting the same codes- both oxygen sensor are working fine when scanning- switching lean to rich- Both sensors were replaced 11/02 and rear was replaced again 10/03- it is setting codes again for both sensors- The code description details sensor rem...
May 26, 2004