Network & communication
Definition only
Lights the check engine lamp
U355E: Expander Inlet Pressure Sensor 2 Circuit
Standardized SAE J2012 code · U35xx codes
What does U355E mean?
Generic fault on the inlet pressure sensor 2 of the expander (turbine recovering energy from the cathode exhaust on FCEVs).
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Common causes
- High Sensor failed
- Low Gateway module routing CAN messages incorrectly
- Low CAN terminating resistor (120 Ω) drifted out of spec
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of U355E on the same make and model first.
U355E in the community
Ask about U355ENo one has posted about U355E yet
Share your vehicle, the tool you used and what you tested — the first thread helps everyone who searches for this code.
Describe your U355E problem