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Home >> Toyota >> 2025 >> Prius Plug-In Hybrid SE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Hybrid Control System (HEV) - Diagnostic Codes (4 Of 4) & Circuit Tests) >> HYBRID CONTROL SYSTEM (for M20A-FXS) >> DTC U1176-87: Lost Communication with Gear Shift Control Module "A" (Powertrain Bus) Missing Message [12/2022 - ] >> Description

DTC U1176-87: Lost Communication with Gear Shift Control Module "A" (Powertrain Bus) Missing Message [12/2022 - ]: Description

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The hybrid vehicle control ECU transmits and receives signals via CAN communication to and from the shift control ECU.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate DTC Output from Priority Note
U1176-87 Lost Communication with Gear Shift Control Module "A" (Powertrain Bus) Missing Message A CAN communication error between the hybrid vehicle control ECU and shift control ECU (CAN communication system malfunction) occurs The hybrid vehicle control ECU cannot receive signals from the shift control ECU
(1 trip detection logic)
  • Transmission floor shift assembly (shift control ECU)
  • Wire harness or connector
Comes on Master Warning:
Comes on
Hybrid Control B SAE Code: U1176