What Does P1905 Mean?
The transmission control module has detected an intermittent short circuit in pressure control solenoid C. Similar to solenoid B issues, this affects hydraulic pressure regulation for specific transmission clutches or bands, with the intermittent nature pointing toward electrical connection problems.
Common Causes
35%
Damaged or chafed wiring harness causing intermittent short to ground
30%
Corroded or loose electrical connector at pressure control solenoid C
25%
Faulty pressure control solenoid C with internal short circuit
7%
Transmission fluid contamination causing solenoid malfunction
3%
Transmission control module driver circuit fault
Diagnostic Steps
1
Step 1: Inspect transmission wiring harness for damage, particularly near heat sources or moving components
2
Step 2: Disconnect solenoid C connector and check for corrosion, moisture, or damaged pins
3
Step 3: Measure solenoid C resistance (typically 3-30 ohms) and verify no short to ground with solenoid disconnected
4
Step 4: Perform wiggle test on harness and connector while monitoring resistance or live data to replicate fault
5
Step 5: Check transmission fluid condition; if wiring checks pass, replace pressure control solenoid C
Estimated Repair Cost
$150 - $600
Parts + labor, varies by vehicle and location
The transmission control module has detected an intermittent short circuit in pressure control solenoid C. Similar to solenoid B issues, this affects hydraulic pressure regulation for specific transmission clutches or bands, with the intermittent nature pointing toward electrical connection problems...
The most common cause of P1905 (Pressure Control Solenoid "C" Intermittent Short) is: Damaged or chafed wiring harness causing intermittent short to ground
Typical repair costs for P1905 range from $150 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
May result in harsh shifting, delayed engagement, or transmission slipping. Vehicle can typically be driven cautiously but continued operation may cause transmission damage.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1905 to identify the root cause.
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Quick Info
Category
Powertrain
System
Transmission Hydraulic Control
Difficulty
Type
Manufacturer
Recommended Tools
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