P1508

Set by the manufacturer, so it means different things on different makes. 19 makes in the table below.

More codes than this one? Paste your whole scan

What P1508 means, by make 19 makes

Acura IAC Valve Circuit Failure
Audi Idle system learning value upper limit reached 45FC 17916
BMW Idle-Speed Control Valve Opening Solenoid Control Open Circuit
Chevrolet Idle Speed Low - Idle Air Control (IAC) System Not Responding
Citroen Idle Control System Circuit Open
Dodge CRANKCASE FILTER RESTRICTION – REPLACE FILTER
Ford Idle Control System Circuit Open
Honda Idle Air Control Valve (IACV) Circuit Malfunction
Isuzu IAC System RPM Low
Jaguar Idle Air Control Circuit Open
Kia Idle Air Control Circuit Open
Land Rover Idle peed Control Open Circuit Fault
Mazda Bypass Air Solenoid 1 Circuit
Mercedes-Benz Bypass air solenoid 1 circuit fault
Opel Idle air control (IAC) valve - circuit malfunction
Peugeot Idle Control System Circuit Open
Saturn IAC Stuck Closed/Open
Volkswagen Idle system learning value upper limit reached 45FC 17916
Volvo Idle Sys. Learned Value Upper Limit Attained

Each line is that manufacturer's own meaning for P1508. They are genuinely different faults, not rewordings of one, so a meaning listed against one make says nothing about the others. If your make is not listed, we do not hold it - your manufacturer's service information is the authority.

Code structure P1508

Powertrain

engine, transmission and emissions

Manufacturer-specific

Defined by the vehicle manufacturer, so the meaning varies between makes.

Fault index

identifies the specific fault

Powertrain Manufacturer-specific

Nearby codes in the P1 range

Manufacturer code meanings from kierandrewett/obd (b56a07a), used under the MIT licence. Copyright (c) Kieran Drewett. SpareRadar is not affiliated with the dataset's authors.