The torque converter clutch solenoid/TCC solenoid is designed to route pressurized hydraulic fluid/ATF down the correct passage, in order to lock the engine and transmission into a 1:1 direct drive. If the transmission control module is not able to control this solenoid, a P1834 diagnostic trouble code will be saved. This DTC is used in General Motors vehicles.
How Serious is the Code?
A P1834 OBDII DTC is very serious, because if the TCM cannot control the torque converter lockup clutch, it may not release when it’s commanded to, which can cause the engine to stall. The transmission may also fail to shift properly, which can affect performance and safety.
Symptoms of a P1834 include:
- Unusually rough gear changes
- Significantly delayed gear changes
- Erratic shifting behavior
- Engine stalls
- Transmission shakes when slowing down or accelerating
- Transmission gets stuck in gear
- Vehicle will not move when in gear
- Transmission overheats
- Reduced fuel economy
- Check engine light
- Low transmission fluid level
- Dirty transmission fluid/filter
- Damaged wiring
- Damaged connector
- Faulty torque converter clutch solenoid/TCC solenoid
- Faulty torque converter clutch and/or assembly
- Clogged hydraulic passages
- Valve body issues
How to Diagnose the Code?
When diagnosing a P1834 DTC, the first thing that should be considered is the condition of the transmission fluid, because dirty ATF can actually keep the TCC solenoid from working as intended. Any relevant wiring and connectors should also be examined for signs of damage and corrosion. Should no issues be found, the torque converter clutch solenoid should be tested for proper operation.
What Repairs Will Fix P1833?
- Change transmission fluid/filter
- Repair wiring and/or connectors
- Install new torque converter clutch solenoid
- Install new TCC clutch and/or assembly
P1833 OBD-II Trouble Code: GM – TCC Solenoid Power Control Circuit Low Voltage