What Does P2728 Mean?
The TCM detects that the control circuit for pressure control solenoid E is not performing within expected parameters. The circuit may have incorrect resistance, abnormal current draw, or voltage levels outside specifications during operation.
Common Causes
30%
High resistance in wiring or connectors causing voltage drop
30%
Partially failed solenoid with out-of-spec resistance
20%
Poor ground connection at TCM or transmission
12%
Low battery or charging system voltage affecting solenoid operation
8%
TCM driver circuit degradation
Diagnostic Steps
1
Step 1: Verify battery voltage is 12.4+ volts and charging system produces 13.8-14.5 volts
2
Step 2: Measure solenoid E resistance and compare to specifications; check for values near limits
3
Step 3: Perform voltage drop test on power and ground circuits while commanding solenoid on
4
Step 4: Check all ground connections between transmission, TCM, and chassis for corrosion or looseness
5
Step 5: Monitor actual vs commanded current flow to solenoid using amp clamp or scan tool PID data
Estimated Repair Cost
$150 - $1,100
Parts + labor, varies by vehicle and location
The TCM detects that the control circuit for pressure control solenoid E is not performing within expected parameters. The circuit may have incorrect resistance, abnormal current draw, or voltage levels outside specifications during operation.
The most common cause of P2728 (Pressure Control Solenoid "E" Control Circuit Range/Performance) is: High resistance in wiring or connectors causing voltage drop
Typical repair costs for P2728 range from $150 to $1,100, depending on the vehicle, location, and whether you do it yourself or go to a shop.
May experience poor shift quality, delayed shifts, or reduced transmission performance. Could progress to complete failure if ignored.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2728 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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