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P23A8 Powertrain

Exhaust Heat Exchanger Bypass Valve B Position Sensor Stop Performance

During calibration the position sensor of bypass valve B does not reach one of its mechanical end stops as expected.

Affected components

  • Exhaust bypass valve b

Common causes

  • High likelihood: Linkage worn or slipping

Diagnostic notes

  • The malfunction indicator lamp may illuminate
  • This code can affect emissions

Sources

Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.

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