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DTC P0131 - Lambda Bank 1 Sensor 1 Circuit Low🔗

Conditions for Setting DTC P0131🔗

  • Engine Running
  • Lambda Bank 1 Sensor ≤ 0.1 volts
  • The above must be present for a period of 128 instances/cycles or greater to trigger DTC P0131

Diagnostic Steps🔗

Step Action Value(s) YES NO
1 Key on, engine running. Within VCM Live, open the Lambda sensor DTC parameter, does the lambda sensor parameter display a voltage of 0.1 volts or less? ≤ 0.1 volts Go to Step 2 Intermittent Issue - Refer to Intermittent Diagnostics
2 Key OFF. Disconnect the Lambda 1 sensor connector and check for continuity between cavity 1 & the ECU connector "C" pin 13. Do you have continuity? Go to Step 3 Repair the circuit as necessary, locate any wires that need to be repaired or replaced
3 Key OFF. Disconnect the Lambda 1 sensor connector and check for continuity between cavity 2 & the ECU connector "C" pin 14. Do you have continuity? Go to Step 4 Repair the circuit as necessary, locate any wires that need to be repaired or replaced
4 Key OFF. Disconnect the Lambda 1 sensor connector and check for continuity between cavity 4 & the ECU connector "C" SP9. Do you have continuity? Go to Step 5 Repair the circuit as necessary, locate any wires that need to be repaired or replaced
5 Key OFF. Disconnect the Lambda 1 sensor connector and check for continuity between cavity 5 & the ECU connector "C" pin 24. Do you have continuity? Go to Step 6 Repair the circuit as necessary, locate any wires that need to be repaired or replaced
6 Key OFF. Disconnect the Lambda 1 sensor connector and check for continuity between cavity 6 & the ECU connector "C" pin 23. Do you have continuity? Go to Step 7 Repair the circuit as necessary, locate any wires that need to be repaired or replaced
7 Replace Lambda 1 sensor. Is the replacement complete? Go to Step 8 N/A
8 Clear any DTC from the ECU. Turn the ignition off and wait 30 seconds. Start the engine and operate the engine to full operating temperature. Observe the Check Engine Light on the Menu bar in VCM Live. After operating the engine within the test parameters, check for any stored codes. Does the engine operate without any stored DTCs? System is now operational and ready to be tuned Contact HP Tuners Support