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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OBD DashX shows which problems come with each code, how often they show up in other vehicles, and how to fix them — step by step.
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Fault codes
P1029
Intake Manifold Air Control Valve Position Sensor Upper Limit Not Reached
Ford
Fuel and Air Metering
High severity
P1051
Brake Switch Signal Missing or Improper
Ford
Vehicle Speed and Idle Control System
High severity
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