Powertrain, generic · Hybrid propulsion

P0A45 Drive Motor B Position Sensor Circuit

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modePossible

P0A45 is the general circuit code for the resolver of the second traction motor (B), usually meaning its signal is missing. GM sets it like P0A3F when sine or cosine amplitude falls below 2.3 V (Type A, one trip). Mitsubishi uses it for the rear motor of the 2023 Outlander PHEV: both sine and cosine below 0.12 V for at least 0.18 s; the resolver is part of the rear motor assembly, which is replaced. Toyota fixes P0A45 on 2016-18 RAV4 Hybrid models built before a production change with a new frame wire harness, and Stellantis lists it for the Pacifica Hybrid. P0A46 to P0A49 split out degraded, low, high and intermittent signals. Expect a hybrid warning, MIL and loss of the motor B drive.

Likely causes

Damaged or faulty frame/body wire harness to the rear motor (Toyota RAV4 Hybrid)

Poor contact at the motor B resolver connector

Resolver or control unit inside the rear motor assembly failed (Mitsubishi)

Hybrid control software needing an update (Stellantis)

Symptoms

MIL and hybrid system warning message
Loss of rear-axle electric drive or all-wheel drive
Reduced power or vehicle not ready

Repair estimate

DifficultyShop_onlyWorkshop job

Parts and labour€150–6,000

Time1–10 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

drive motor b position sensorwiring harnesshybrid control module

References: gsi.ext.gm.com, mitsubishitechinfo.com, static.nhtsa.gov, static.nhtsa.gov.