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Home >> Honda >> 2021 >> Accord Touring >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle - DTC Diagnostics (P0876 - U1260) (Except Hybrid) >> DTC Troubleshooting >> DTC P099B, P099C (A/T)

DTC P099B, P099C (A/T)

DTC P099B  : Shift Solenoid Valve G Circuit Low DTC P099C  : Shift Solenoid Valve G Circuit High

NOTE:  Before you troubleshoot, review the General Troubleshooting Information .

DTC Description Confirmed DTC Pending DTC Freeze Frame
P099B Shift Solenoid Valve G Circuit Low      
P099C Shift Solenoid Valve G Circuit High      

DTC (A/T)

  1. Problem verification

    -1. Turn the vehicle to the ON mode.

    -2. Clear the DTC with the HDS.

    -3. Test-drive under these conditions:

    DTC Test Condition
    P099B
    • Turn the vehicle to the OFF (LOCK) mode.
    • Turn the vehicle to the ON mode.
    P099C Start the engine.

    -4. Check for Pending or Confirmed DTCs with the HDS.

    DTC Description Confirmed DTC Pending DTC Freeze Frame
    P099B Shift Solenoid Valve G Circuit Low      
    P099C Shift Solenoid Valve G Circuit High      

    Is DTC P099B or P099C indicated?

    YES 

    The failure is duplicated. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good TCM , then recheck. If this DTC goes away and the TCM was substituted, replace the original TCM .

    NO 

    Intermittent failure, the system is OK at this time. Check for poor connections and loose terminals between shift solenoid valve G and the TCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.