Check Input Voltage STP4

Voltage detected outside tolerance at the STP4 module.

Possible causes

Discharged battery
Failing alternator
High resistance in connector
Corrosion in fuse holders

Recommended actions

Check battery voltage with engine off and running
Clean main harness connectors
Check power fuses
Verify ground wiring

Can't find your code? Talk to an expert

$150

One-on-one phone session with a Low Temp refrigeration tech. Emergency temporary assistance only.

Email (opcional)

Teléfono (opcional)

¿Tienes un cupón?

I understand this is emergency temporary remote guidance only, no repair is guaranteed, I assume all risks, and Low Temp Service is not liable for cargo, engine, electrical, mechanical or accident damages. I accept the Terms & Conditions.

Have a question? Ask the community

Thousands of refrigeration mechanics read and answer for free. Post your case in under 1 minute.

Other Carrier Transicold codes

00001Low Fuel Level Warning 00002Low Engine Oil Level Warning 00003Low Coolant Level 00004Low Refrigerant Level AL10Alarm 10 – Supply Air Temperature Sensor (SATS) Out of Range 00011Check/Low Engine Oil Pressure

View all Carrier Transicold codes

Need a professional diagnosis?

Low Temp Service — refrigeration experts in Florida.