Perodua OBD Trouble Code 21

Perodua Problems For OBD Code 21

Engine coolant temperature (ECT) out of self-test range

TPS signal fault

Engine coolant temperature sensor

Oxygen sensor circuit

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 Perodua Models

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