Powertrain
Definition only
Lights the check engine lamp
P2E56: Exhaust Pressure Sensor C Circuit Low
Standardized SAE J2012 code · P2Exx codes
What does P2E56 mean?
The ECM detects a circuit low fault on the exhaust pressure sensor c circuit. Reading cannot be used reliably for control.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High Signal wire shorted to ground
- Medium Internal sensor short
- Low Connector pins corroded - high contact resistance
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2E56 on the same make and model first.
P2E56 in the community
Ask about P2E56No one has posted about P2E56 yet
Share your vehicle, the tool you used and what you tested — the first thread helps everyone who searches for this code.
Describe your P2E56 problem