U3567 indicates a fault in the anode inlet pressure sensor 2 circuit, typically found in fuel cell or hybrid battery management systems. The code is set when the control module detects an abnormal voltage, open, or short in the sensor circuit. It generally points to an issue with the sensor, its wiring, or connectors rather than the engine computer.
The sensor itself may have failed, causing an open or short circuit that triggers the code.
Insulation damage, broken wires, or chafing can cause short or open circuits in the sensor wiring.
Moisture intrusion, corrosion, or poor terminal contact can create high resistance or intermittent faults.
A fault in the sensor's 5V reference or ground path can prevent proper operation and set the code.
Although rare, electromagnetic interference or a faulty shared reference can affect the circuit.
A defect in the engine or hybrid control module could theoretically cause erroneous code detection, but this is the least common cause.
No. In the vast majority of cases the fault lies with the sensor, its wiring, or connectors. Replacing the PCM is rarely necessary and is usually a misdiagnosis.
Yes. A poor ground at the sensor can create an abnormal voltage reading and trigger the code. Checking ground connections is an important step.
The vehicle may enter a limited‑performance or limp‑home mode to protect the fuel cell or battery system. It is advisable to address the issue promptly.
Often, replacing the faulty anode inlet pressure sensor clears the code, provided the wiring and connectors are in good condition.