DTC P0141: Secondary HO2S (Sensor 2) Heater Circuit Malfunction Turn the ignition switch ON (II). Clear the DTC with the HDS. Start the engine. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0141 indicated?
YES | - | Go to Step 4 .
NO | - | Intermittent failure, system is OK at this time.Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM.■
Check the No. 18 ACG (15 A) fuse in the under-dash fuse/relay box. Is the fuse OK?
YES | - | Go to Step 6 .
NO | - | Repair short in the wire between the secondary HO2S (Sensor 2) and the No. 18 ACG (15 A) fuse, then go to Step 25 .
Turn the ignition switch OFF. Disconnect the secondary HO2S (Sensor 2) 4P connector. At the secondary HO2S (Sensor 2) side, measure resistance between secondary HO2S (Sensor 2) 4P connector terminals No. 3 and No. 4. Is there 5.0−6.4 Ω at room temperature?
YES | - | Go to Step 9 .
NO | - | Go to Step 23 .