P0141 Chevrolet Uplander I

The ECM determines the temperature by measuring the current flow through the heater. For diagnosis, the ECM monitors the heater current with the engine running. If the ECM detects that the HO2S 1 heater low control circuit current level is not within the calibrated range, DTC P0141 sets for HO2S 2.

Conditions for Running the DTC

P0036

1. The engine is cranking or running.
2. The system voltage is between 11-18 volts.

P0054

1. The ignition is OFF for more than 10 hours.
2. The ECT Sensor parameter minus the IAT Sensor parameter is less than 8°C (14°F) at engine start-up.
3. The ECT Sensor parameter is between -30 and +45°C (-22 and +133°F) at engine start-up.
4. The system voltage is between 9-18 volts.
5. This diagnostic runs one time per valid cold start when the above conditions are met.

P0141

1. DTCs P0036, P0054, P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0120, P0125, P0128, P0201, P0202, P0203, P0204, P0205, P0206, P0220, P0442, P0443, P0446, P0449, P0451, P0452, P0453, P0454, P0455, P0464, P0496, P2135 are not set.
2. DTCs P0420 and P2A01 are not commanding fuel.
3. The system voltage is between 9-18 volts.
4. The scan tool special functions are not active.
5. The Engine Run Time parameter is at least 100 seconds.
6. The ECT parameter is at least 65°C (149°F).
7. The MAF Sensor parameter is between 4-30 g/s.
8. The Engine Speed parameter is between 600-3,000 RPM.
9. The above conditions have been met for at least 2 seconds.

Conditions for Setting the DTC

P0036

1. The ECM detects that the HO2S 1 heater control circuit status is incorrect for more than 2 seconds.
2. This diagnostic runs continuously.