Powertrain, generic · Hybrid propulsion

P0C1A Drive Motor B Torque Delivered Performance

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0C1A compares the torque command for motor B with the torque the motor control processor calculates as actually delivered. GM's 2016, 2018 and 2019 tables set it when the difference exceeds 132 Nm for 0.1875 s in a 0.2 s window, Type A, one trip, and only while listed resolver and motor control faults are inactive. The 2011 Volt and 2012 two-mode tables also list it, the trucks with a three-phase current sum above 110 A. Chrysler documents it on the 2017 to 2023 Pacifica Hybrid: with resolver codes P0A3F, P0A43 or P0A45 it points to a short in the internal wiring connector of the eFlite transmission, which is replaced. P0C19 is motor A. Expect limp mode.

Likely causes

Short in the internal transmission wiring connector (Chrysler Pacifica Hybrid 21-008-23)
Implausible rotor position signal from the motor B resolver
Hybrid control or inverter module software requiring an update
Faulty phase current sensing for motor B

Symptoms

  • Malfunction indicator lamp
  • Vehicle in limp mode with reduced propulsion
  • Hybrid system warning, engine runs more often

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€80–8,000
Time0–10 h

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

Parts involved

drive motor bhybrid control module

Related codes

P0C19P0A1CP0A79P0A45P0BF2

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