P0977 HONDA - Shift Solenoid Valve 'B' Circuit Open
- Faulty Shift Solenoid Valve 'B'
- Shift Solenoid Valve 'B' harness is open or shorted
- Shift Solenoid Valve 'B' circuit poor electrical connection
- Engine Light ON (or Service Engine Soon Warning Light)
P0977 Honda DescriptionWhen shift solenoid valves A, B, C, D, and E are turned ON, the hydraulic pressure circuit opens. The hydraulic pressure circuit supplies/discharges hydraulic pressure to/from each clutch according to the combination of the ON/OFF status of the shift solenoid valves. The Powertrain Control Module (PCM) commands the driver circuit to turn on the shift solenoid valve. The circuit diagnoses malfunctions such as a circuit short or open, and sends back a return signal during the PCM's command. When the return signal does not match the PCM command, a malfunction is detected by the PCM. When the return signal does not match the PCM command to turn ON the shift solenoid valve, the PCM detects a malfunction and stores a Diagnostic Trouble Code (DTC).
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