P0940 Hydraulic Oil Temperature Sensor Circuit High

P0940 indicates a high hydraulic oil temperature sensor circuit. The temperature signal is above expected range, open, or shorted to voltage.

Code status

Needs verification

Not yet verified against SAE J2012_202509 / J2012DA. Treat unverified rows as a lookup aid, not repair authority.

System
Transmission
Scope
iso-sae-controlled-p0
Standard
SAE J2012 / ISO 15031-6
Source
legacy-import

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not treat this as confirmed hydraulic overheating until the high sensor circuit is tested.

Useful checks before replacing parts

Related OBD-II codes

These nearby transmission entries can help compare wording and fault area. They may share the same verification status as the source database.