Code for all 4 O2 sensors popping up

[swathdiver]

I would check that 02 heater circuit with a meter, @swathdiver do you have the info for the 02 heater circuit on a obs? ohm's check?

The shop manual for mine shows that the heater circuit for the upstream sensors should be between .7 and .9 Amps and for the downstream O2 sensors between .4 and .6 Amps.

From the shop manual:

Circuit/System Testing

Note: You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.

1. Ignition OFF, disconnect the harness connector at the appropriate HO2S.
2. Ignition ON, verify that a test lamp illuminates between the appropriate HO2S heater voltage supply circuit terminal D and ground.

¤ If the test lamp does not illuminate, test the HO2S heater voltage supply circuit for a short to ground or an open/high resistance. If the circuit tests normal and the HO2S heater voltage supply circuit fuse is open, test all components connected to the fuse and replace as necessary.

1. Ignition ON, verify that a test lamp does not illuminate between the appropriate HO2S heater voltage supply circuit terminal D and the appropriate HO2S heater low control circuit terminal listed below:

• B1S1 terminal C
• B1S2 terminal C
• B2S1 terminal C
• B2S2 terminal C

¤ If the lamp illuminates, test the HO2S heater low control circuit for a short to ground. If the circuit tests normal, replace the ECM.

1. Engine running, leave the test lamp connected from the previous step. The lamp should flash or be ON steady.

¤ If the test lamp is not ON steady or flashing, test the HO2S heater low control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the ECM.
Note:

• The output driver should detect a short to voltage and turn OFF. If a resistance fault is present the driver will remain ON and the scan tool will display more than 0.0 amp. Less than 10 ohms may set a DTC.
• Performing this test may set additional DTCs.

1. Ignition OFF, install a 30A fused jumper wire between the appropriate HO2S heater voltage supply circuit terminal D and the appropriate HO2S heater low control circuit terminal listed below:

• B1S1 terminal C
• B1S2 terminal C
• B2S1 terminal C
• B2S2 terminal C

1. Engine running, verify the appropriate scan tool HO2S Heater parameter is less than 0.1 amp.

¤ If more than the specified range, test the HO2S heater voltage supply and HO2S heater low control circuits for more than 1 ohm. If the circuits test normal, replace the ECM.

1. If the ECM and all circuits test normal, replace the appropriate HO2S.

 

[PG01]

Sounds like a wire harness got crushed or is melting on the exhaust since the motor swap

 

[Danie Lizarraga]

Sounds like a wire harness got crushed or is melting on the exhaust since the motor swap

It had the O2 problems before we had swapped the motor

 

[PG01]

It had the O2 problems before we had swapped the motor

Ok then, james and Wes got you then, carry on.... lol