Rick's Free Auto Repair Advice

P0141, 02 Sensor Heater Circuit Malfunction, Bank 1 Sensor 2, Dodge Grand Caravan and Plymouth Voyager van.

P0141, 02 Sensor Heater Circuit Malfunction, Bank 1 Sensor 2, Dodge Grand Caravan and Plymouth Voyager van.

This trouble code indicates that the computer has detected a problem with the heater in the oxygen sensor located after the catalytic converter. Before you replace the sensor, check for battery voltage on the dark green/orange wire after placing a jumper wire between terminals 30 and 87 in the auto shutdown relay socket. Power for the downstream sensor comes from the auto shutdown relay. If you get battery voltage on that wire at the sensor, that’s great, but it doesn’t automatically mean you’ve got a bad sensor. You may have corrosion that reduces current flow. Experts suggest connecting a headlight to that wire and ground to ensure you’re getting proper current flow.

If you’re not getting any voltage or you’re getting voltage but low current, check the connector located under the air cleaner. This E43 connector is a wiring junction that splits current to both the upstream and downstream connector. Shops report corrosion and wire breakage at this connector.

For more information on this repair or any others for your vehicle, buy an online subscription to either Alldatadiy.com or eautorepair.net. Click on this link to compare the two services: Compare Alldata and Eautorepair.
If you just need information for a single repair and want to save money,eautorepair offers a lower price 1-week subscription for only $11.99. Or, if you’ll be working on this vehicle in the future, you can buy a 1-year subscription (Alldatadiy.com for $26.99, or eautorepair.net $29.99)

© 2012 Rick Muscoplat

Posted on by Rick Muscoplat


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