Exhaust Pressure Sensor A Circuit Range/Performance

Where it lives

For P0471, the part to look at first is the sensor named here.

Check these first

• A failed exhaust pressure sensor A
• An erratic sensor A signal
• Corrosion at the sensor A connector
• A partially clogged pressure tube
• An ECM fault on the sensor A circuit

What to do next

1. Compare the exhaust pressure reading to a key on value
2. Inspect the sensor A connector for corrosion
3. Check the pressure tube for partial blockage
4. Verify the sensor A is the correct part
5. Replace sensor A if the reading stays off
6. Clear the code and retest

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