Visual inspection

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Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .)
Remove the exhaust gas pressure sensor. (See EXHAUST GAS PRESSURE SENSOR REMOVAL/INSTALLATION .)
Visually inspect the exhaust gas pressure sensor for the following malfunction:
- Damage, cracks, dirt
  - If there is any malfunction, repair or replace the exhaust gas pressure sensor. (See EXHAUST GAS PRESSURE SENSOR REMOVAL/INSTALLATION .)