What does code P1503 mean?

Q: What does code P1503 mean?

Theft Deterrent System Password Incorrect. P1503 on a Chrysler vehicle means the theft deterrent system, often called the Sentry Key Immobilizer System (SKIS), has detected that the password sent by the ignition key or the wireless control module does not match the password stored in the powertrain control module (PCM). The PCM sets this code when it receives an incorrect or missing secret key code during the engine start sequence, which typically prevents the engine from cranking or running.

DTC codes / Chrysler codes / P1503

P1503 · ChryslerTheft Deterrent System Password Incorrect

P1503 on a Chrysler vehicle means the theft deterrent system, often called the Sentry Key Immobilizer System (SKIS), has detected that the password sent by the ignition key or the wireless control module does not match the password stored in the powertrain control module (PCM). The PCM sets this code when it receives an incorrect or missing secret key code during the engine start sequence, which typically prevents the engine from cranking or running.

SystemPowertrain

Code typeChrysler specific

SeverityMedium

Fix difficultyProfessional

AreaVehicle speed, idle control and auxiliary inputs

Guidance is general and written for Chrysler vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.