Aero OBD Trouble Code 21

Aero Problems For OBD Code 21

Main oxygen sensor signal fault

Fuel tune select

Throttle position sensor (TPS) circuit fault, voltage high

ECT out of Self-Test range MAP/BARO out of Self-Test range.

Oxygen sensor reporting too lean or too rich after 2 – 12 minutes with temp over 170° and RPM above 1500

Check 21 OBD1 Code For All Aero Models

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