O2 Sensor Signals Swapped Bank 1 Sensor 1 / Bank 2 Sensor 1
2015-2015 Mitsubishi Outlander 3.0L V6 🇷🇺
Description
The PCM has determined that the upstream O2 sensor signals for Bank 1 and Bank 2 are swapped, likely due to incorrect wiring after sensor replacement.
Symptoms
- Check Engine Light
- Poor fuel economy
- Rough running
- Failed emissions
Common Causes
- O2 sensor connectors swapped after service
- Wiring crossed between banks
- Incorrect sensor installation
Diagnostic Steps
- Verify which O2 sensor is connected to which bank
- Trace wiring from each sensor to PCM connector
- Check for crossed connectors
Repair Notes
Swap the sensor connectors to the correct banks.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P0040 on Other Vehicles
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1999-1999 3.0L V6 Twin Turbo
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2002-2002 1.5L I4 4A91
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Common Questions
What does code P0040 mean on a 2015-2015 Mitsubishi Outlander?
P0040 stands for "O2 Sensor Signals Swapped Bank 1 Sensor 1 / Bank 2 Sensor 1". The PCM has determined that the upstream O2 sensor signals for Bank 1 and Bank 2 are swapped, likely due to incorrect wiring after sensor replacement.
What are the symptoms of P0040 on a Mitsubishi Outlander?
Common symptoms of P0040 include: Check Engine Light, Poor fuel economy, Rough running, Failed emissions.
What causes P0040 on a 2015-2015 Mitsubishi Outlander?
Common causes of P0040 include: O2 sensor connectors swapped after service, Wiring crossed between banks, Incorrect sensor installation.