What Does P2729 Mean?
The TCM has detected abnormally low voltage in the pressure control solenoid E control circuit. This could be caused by a short to ground, excessive resistance, or insufficient voltage supply preventing proper solenoid operation.
Common Causes
35%
Short to ground in wiring harness
30%
Failed solenoid with internal short to case ground
15%
Damaged connector causing short circuit
12%
TCM internal short or driver circuit failure
8%
Low voltage supply from blown fuse or poor power connection
Diagnostic Steps
1
Step 1: Disconnect solenoid E connector and measure resistance to ground on both harness wires; should be infinite
2
Step 2: Check solenoid coil resistance and measure resistance from solenoid case to ground
3
Step 3: Inspect wiring harness for damage where it may contact transmission case or frame
4
Step 4: Verify voltage supply at solenoid connector reaches battery voltage with key on
5
Step 5: If no external shorts found, suspect TCM internal driver circuit pulling circuit to ground
Estimated Repair Cost
$150 - $1,200
Parts + labor, varies by vehicle and location
The TCM has detected abnormally low voltage in the pressure control solenoid E control circuit. This could be caused by a short to ground, excessive resistance, or insufficient voltage supply preventing proper solenoid operation.
The most common cause of P2729 (Pressure Control Solenoid "E" Control Circuit Low) is: Short to ground in wiring harness
Typical repair costs for P2729 range from $150 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Transmission may enter limp mode or exhibit harsh/erratic shifting. Continued operation may cause damage to transmission clutch packs.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2729 to identify the root cause.
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Quick Info
Category
Powertrain
System
Transmission Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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