What does code P1488 mean?

Q: What does code P1488 mean?

Auxiliary 5 Volt Supply Output Too Low. P1488 on Chrysler vehicles means the powertrain control module (PCM) has detected that the auxiliary 5-volt reference supply it provides to one or more sensors has dropped below the acceptable threshold. This 5-volt feed powers sensors such as the manifold absolute pressure (MAP) sensor, throttle position sensor (TPS), and others, so a low output can skew multiple sensor readings at once.

DTC codes / Chrysler codes / P1488

P1488 · ChryslerAuxiliary 5 Volt Supply Output Too Low

P1488 on Chrysler vehicles means the powertrain control module (PCM) has detected that the auxiliary 5-volt reference supply it provides to one or more sensors has dropped below the acceptable threshold. This 5-volt feed powers sensors such as the manifold absolute pressure (MAP) sensor, throttle position sensor (TPS), and others, so a low output can skew multiple sensor readings at once.

SystemPowertrain

Code typeChrysler specific

SeverityMedium

Fix difficultyIntermediate

AreaAuxiliary emission controls

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