Chevrolet Code P0141 is a common problem encountered by many Chevrolet owners. It is an engine diagnostic trouble code (DTC) for “HO2S Heater Performance Bank 1 Sensor 2”. This code is triggered when the engine control module (ECM) detects that the heater current of the HO2S 2 is either greater than 2.875 amps or less than 0.25 amps. The code will be set within 120 seconds during the heater current test under certain conditions, such as the engine coolant temperature above 122°F, ignition voltage between 10-32 V, engine run time greater than 300 seconds, and engine speed within 500-3000 RPM. Several related service bulletins are available to help diagnose and repair this code.
💥See also: Chevrolet Code P2495
Causes and Solutions for Chevrolet Code P0141
| Cause | Solution |
|---|---|
| P0141 or P0161 | Check for any loose or corroded wiring or connectors. |
| ECM detects HO2S 2 heater current is greater than 2.875 amps | Replace the oxygen sensor. |
| ECM detects that the HO2S 2 heater current is less than 0.25 amps | Check the HO2S heater circuit for any open or short courses. |
| DTCs set within 120 seconds during the heater current test | Check the wiring and connectors of the oxygen sensor. |
P0141 or P0161
Chevrolet Code P0141 is an indication that the engine control module (ECM) has detected that the heater current of the HO2S 2 is either greater than 2.875 amps or less than 0.25 amps. If this is the case, the first step is to check for any loose or corroded wiring or connectors, which can lead to electrical circuit problems.
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ECM Detects HO2S 2 Heater Current is Greater than 2.875 Amps
If the ECM detects that the heater current of the HO2S 2 is greater than 2.875 amps, the next step is replacing the oxygen sensor. It is important to ensure that the oxygen sensor is working properly, as this can cause several issues with the engine.
ECM Detects HO2S 2 Heater Current is Less than 0.25 Amps
If the ECM detects that the heater current of the HO2S 2 is less than 0.25 amps, then the next step is to check the HO2S heater circuit for any open or short courses. It is important to check the wiring and connectors of the oxygen sensor, as this can cause the P0141 code to be triggered.
DTCs Set Within 120 s During the Heater Current Test
If the DTCs are set within 120 seconds during the heater current test, then the next step is to check the wiring and connectors of the oxygen sensor. This can help ensure that the oxygen sensor works properly and no other underlying issues exist.
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Conclusion
In conclusion, Chevrolet Code P0141 is a common problem encountered by many Chevrolet owners and can be caused by several issues. The solutions for this code can vary, and it is important to check for any loose or corroded wiring or connectors, replace the oxygen sensor, and check the HO2S heater circuit for any open or short courses. By following these solutions, you can help ensure that you can properly diagnose and repair Chevrolet Code P0141.
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