The Lincoln Code P0135 is an important diagnostic code that indicates a malfunction of the O2 Sensor Heater Circuit (Bank 1 Sensor 1). This code arises when an open or short circuit is detected or the heater current draw exceeds a calibrated limit. There are many potential causes of the P0135 code, from UO2SHTR11 circuit open or short to voltage, HTR11 circuit open or short to voltage, VPWR circuit open, low battery voltage, water in the harness connector, corrosion, incorrect connections, damaged Universal Heated Oxygen Sensor Bank 1, Sensor 1 (HO2S11) heater, or damaged HO2S11 heater. To diagnose the code, one must inspect the connectors for signs of damage, water intrusion or corrosion.
Causes and Solutions to Lincoln Code P0135
| Causes | Solutions |
|---|---|
| UO2SHTR11 circuit open (if equipped) | Check the UO2SHTR11 circuit for continuity |
| UO2SHTR11 circuit short to voltage (if equipped) | Check the UO2SHTR11 circuit for incorrect voltage |
| HTR11 circuit open (if equipped) | Inspect the HTR11 circuit for any loose connections |
| HTR11 circuit short to voltage (if equipped) | Check the HTR11 circuit for incorrect voltage |
| VPWR circuit open | Check the VPWR circuit for continuity |
| Low battery voltage | Test the battery and replace it if necessary |
| Water in the harness connector | Check and dry the harness connector |
| Corrosion | Clean the connectors |
| Incorrect connections | Re-connect the wires correctly |
| Damaged universal heated oxygen sensor bank 1, sensor 1 (HO2S11) heater (if equipped) | Check and replace the HO2S11 heater if necessary |
| Damaged HO2S11 heater (if equipped) | Replace the HO2S11 heater |
When diagnosing a Lincoln Code P0135, it is important to understand the potential causes and solutions. While the code may appear daunting at first, there are a variety of straightforward solutions available. From checking the UO2SHTR11 circuit for continuity to inspecting the HTR11 circuit for any loose connections, the causes and solutions of the code can be found in the table above. With an understanding of the potential causes and solutions, diagnosing and resolving the code quickly and effectively is possible.
UO2SHTR11 Circuit Open (If Equipped)
If the UO2SHTR11 circuit is open, the code P0135 will appear. To identify and solve this issue, one should check the UO2SHTR11 circuit for any continuity. If the circuit is open, the circuit should be tested and the wires should be reconnected correctly to ensure that the code does not reappear.
HTR11 Circuit Open (If Equipped)
When the HTR11 circuit is open, the code P0135 will appear. To address this issue, one should inspect the HTR11 circuit for any loose connections. If the circuit is open, the circuit should be tested and the wires should be reconnected correctly to ensure that the code does not reappear.
Low Battery Voltage
If the battery voltage is low, the code P0135 will appear. To solve this issue, one should test the battery and replace it if necessary. This will help to fix the code and ensure that it does not reappear.
Water in the Harness Connector
When water enters the harness connector, the code P0135 will appear. To fix this issue, one should check and dry the harness connector. This will help to fix the code and ensure that it does not reappear.
Damaged Universal Heated Oxygen Sensor Bank 1, Sensor 1 (HO2S11) Heater (If Equipped)
When the HO2S11 heater is damaged, the code P0135 will appear. To solve this issue, one should check and replace the HO2S11 heater if necessary. This will help to fix the code and ensure that it does not reappear.
Conclusion: Resolve the Lincoln Code P0135 with the Right Solutions
The Lincoln Code P0135 is an important diagnostic code that requires one to understand the potential causes and solutions. From checking the UO2SHTR11 circuit for continuity to inspecting the HTR11 circuit for any loose connections, the causes and solutions of the code can be found in the table above. With an understanding of the potential causes and solutions, diagnosing and resolving the Lincoln Code P0135 quickly and effectively is possible.
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