P0471

Exhaust Pressure Sensor A Circuit Range/Performance

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–111 (est.)

Symptoms

Check Engine Light Is On
Reduced engine power
Increased fuel consumption
Unstable idling

Causes

Malfunction of the exhaust gas pressure sensor
Open or shorted sensor wiring harness
Poor contact in the sensor connector
Mechanical damage to the sensor or its tubes
Problems with power or grounding of the sensor circuit

How to Fix

Visual inspection of the sensor and its connections
Checking the integrity of the wiring harness
Measuring the sensor supply voltage
Checking the sensor signal with a scanner or oscilloscope
Replacing a faulty sensor if necessary

Related codes

P0470 P0472 P0401 P0402