Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCADILLAC2011CTS BASE, 4D WAGON, 3.6 D, AWDREPAIR AND DIAGNOSISTRANSMISSIONAUTOMATIC TRANSAUTOMATIC TRANSMISSION - 6L45/6L50/6L90 - DTC P0150C THROUGH DTC P2764DTC P2723 OR P2724CIRCUIT/SYSTEM TESTING
2011 Cadillac CTS Base, 4D Wagon, 3.6 D, AWD
Circuit/System Testing
2011 Cadillac CTS Base, 4D Wagon, 3.6 D, AWDSECTION Circuit/System Testing
- Perform the Line Pressure Check
. Verify the transmission line pressures are within the specified ranges.
- If not within the specified ranges, refer to Fluid Pressure High or Low .
- Ignition OFF, remove the Q8 control solenoid valve assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly Replacement .
- Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test
. Test all solenoids on the Q8 control solenoid valve assembly. A pressure change should occur for each solenoid valve.
- If the Q8 control solenoid valve assembly does not pass the performance test, replace the Q8 control solenoid valve assembly.
- Listed in the chart below, are conditions for each component that could set DTC P2723 or P2724. Carefully inspect each component for that condition. Repair or replace as necessary.
| DTC | Component | Condition |
|---|---|---|
| P2723 P2724 |
Control Valve Upper Body Assembly (304) | 1-2-3-4 Clutch Regulator Valve (337) stuck / sticking - debris, binding, damaged valve, or scored bore |
| P2723 | Q8 Control Solenoid Valve Assembly (314) | Refer to document PIP 4304A. DTC P2723 may be set with DTC P0878 |
| P2723 P2724 |
Q8 Control Solenoid Valve Assembly (314) |
|
| P2723 | Control Valve Upper Body Assembly (304) | Clutch Select Valve 3 (352) stuck / sticking - debris, binding, damaged valve, or scored bore |
| P2723 | A/Trans Fluid Pump Cover Assembly (219) | Pump Tower Seals (230) damaged / leaking |
| P2723 | 1-2-3-4 and 3-5-R Clutch Housing Assembly (51) | 1-2-3-4 Clutch Piston (414) cracked / damaged / leaking |
| P2723 | 1-2-3-4 and 3-5-R Clutch Housing Assembly (51) | Housing / hub weld cracked / leaking |
| P2723 | 1-2-3-4 and 3-5-R Clutch Housing Assembly (51) | 1-2-3-4 Clutch Backing Plate Retaining Ring (429) not seated / oriented, causing clutch pack / piston over travel |
| P2723 | Control (with body and valve) Valve Assembly (21) | Valve Body to Pump Transfer Seal Assembly (19) damaged / leaking |
| P2723 | Torque Converter (w/Fluid Pump) Housing Assembly (2) |
|
| P2723 | Automatic Transmission Fluid Filter Assembly (26) | Oil filter (26) or filter seal (25) loose or damaged |
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.