P0891 code meaning, causes and symptoms
P0891 means tcm power relay sense circuit high.
P0891 code meaning is one of the most common OBD-II searches when a warning light appears on the dashboard.
Drivers searching for P0891 usually want to know what the code means, whether the car is safe to drive and what part may need testing first.
Because P0891 can appear on multiple makes and models, it is important to combine the code meaning with live data, symptoms and any other stored faults.
A proper diagnosis for P0891 should normally include a scan tool check, freeze-frame review and inspection of the components related to tcm power relay sense circuit high.
Severity: Medium
Driving advice: Whether you can keep driving depends on how the vehicle is behaving. If there is rough running, loss of power, overheating or stalling, diagnose it as soon as possible.
FAQs
What does P0891 mean?
P0891 means tcm power relay sense circuit high.
What can cause P0891?
Causes can include failed components, wiring faults, leaks, pressure issues, bad readings or another upstream fault affecting the same system.
Is P0891 serious?
Severity depends on how the vehicle is behaving and what system is affected. Some codes are minor, while others can affect engine performance, emissions or drivability.