P0971 HONDA – Problem in A/T Clutch Pressure Control Solenoid Valve ‘C’ Circuit High

P0971 HONDA Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light),Transmission will not shift gears.

P0971 HONDA Possible Causes

Faulty A/T Clutch Pressure Control Solenoid Valve ‘C’,A/T Clutch Pressure Control Solenoid Valve ‘C’ harness is open or shorted,A/T Clutch Pressure Control Solenoid Valve ‘C’ circuit poor electrical connection

P0971 HONDA Description

A/T clutch pressure control solenoid valve C is used for clutch pressure control. A spool in A/T clutch pressure control solenoid valve C pushes the valve according to the duty cycle that is controlled by the Powertrain Control Module (PCM) (The hydraulic pressure is proportional to the current). The PCM measures the current flowing through A/T clutch pressure control solenoid valve C and uses feedback control to compensate for the difference between the actual current and the commanded one. If the measured current for the PCM output duty cycle is not within a specified range (circuit short or open), the PCM detects a malfunction and stores a Diagnostic Trouble Code (DTC).