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Diagnostic knowledge / P1895 — TCM To ECM Torque Reduction Circuit - Read Our Article on Automotive Circuit Testing For Help With This GM Check Engine Light Code; Engine control module (ECM), limp home position - performance problem
P1895

TCM To ECM Torque Reduction Circuit - Read Our Article on Automotive Circuit Testing For Help With This GM Check Engine Light Code; Engine control module (ECM), limp home position - performance problem

P1895 is described as “TCM To ECM Torque Reduction Circuit - Read Our Article on Automotive Circuit Testing For Help With This GM Check Engine Light Code; Engine control module (ECM), limp home position - performance problem” in the GM reference. Other reference families are shown below; select the scope relevant to your vehicle.

Manufacturer reference family

GM: P1895

en

TCM To ECM Torque Reduction Circuit - Read Our Article on Automotive Circuit Testing For Help With This GM Check Engine Light Code; Engine control module (ECM), limp home position - performance problem

Reference namespace
gm
Source revision
legacy-oem-dtc-r2-20260924

Reference family assigned by the production catalog. An entry in this family is not proof of a fault or ECU support on every listed vehicle.

Manufacturer reference family

Acura / Honda: P1895

en

CVT Pulley Pressure Control Valve Circuit

Reference namespace
honda
Source revision
legacy-oem-dtc-r2-20260924

Reference family assigned by the production catalog. An entry in this family is not proof of a fault or ECU support on every listed vehicle.

Related catalog brands: Honda, Acura.

12 profiles assigned this reference family
Manufacturer reference family

Suzuki: P1895

en

TCM To ECM Torque Reduction Circuit Malfunction

Reference namespace
suzuki
Source revision
legacy-oem-dtc-r2-20260924

Reference family assigned by the production catalog. An entry in this family is not proof of a fault or ECU support on every listed vehicle.

Related catalog brands: Suzuki.

6 profiles assigned this reference family
Manufacturer reference family

GAC / Lexus / Toyota: P1895

en

DSU Circuit Malfunction

Reference namespace
toyota
Source revision
legacy-oem-dtc-r2-20260924

Reference family assigned by the production catalog. An entry in this family is not proof of a fault or ECU support on every listed vehicle.

Related catalog brands: GAC, Toyota, Lexus.

24 profiles assigned this reference family
Manufacturer reference family

Audi / Jetta / MAN / Seat / Skoda / Volkswagen: P1895

de

TCM to ECM Torque Reduction Circuit

en

TCM to ECM Torque Reduction Circuit

Reference namespace
vag
Source revision
legacy-oem-dtc-r2-20260924

Reference family assigned by the production catalog. An entry in this family is not proof of a fault or ECU support on every listed vehicle.

Related catalog brands: Skoda, Volkswagen, Audi, Seat, MAN, Jetta.

56 profiles assigned this reference family

32 more related profiles are listed in the vehicle directory.

What should I check before using this definition?

Keep the full code, module, status and freeze-frame data. Confirm the vehicle’s make, model, year and current manufacturer service information before choosing a repair. This entry does not identify a failed part by itself.

Organize a scan report or recording
Source and applicability

OBD Lens production library legacy-owner-2026-10-09-v81. This is a scoped technical reference, not a scan of your car. A catalog relationship does not certify that every ECU, year or engine returns the same signal or code definition.

Read the reference method

OBD Lens reference library · catalog legacy-owner-2026-10-09-v81. Sources and scope