OBD fault code library
Look up any P or U code to see what it means, what causes it, the parts involved and how it gets fixed.
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Fault codes
P1401
Heated Catalyst Current Too High During Heating Bank 1
BMW
Auxiliary Emissions Control
Medium severity
P1403
Carbon Canister Shut Off Valve Control Circuit Electrical
BMW
Auxiliary Emissions Control
Medium severity
P1404
Heated Catalyst Current too High During Heating Bank 2
BMW
Auxiliary Emissions Control
Medium severity
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