What Does P1902 Mean?
The transmission control module has detected an intermittent short circuit in pressure control solenoid B. This solenoid regulates hydraulic pressure for specific clutch packs or gear engagement, and the intermittent nature suggests a wiring or connector issue rather than complete failure.
Common Causes
35%
Damaged or chafed wiring harness causing intermittent short to ground
30%
Corroded or loose electrical connector at pressure control solenoid B
25%
Faulty pressure control solenoid B with internal short circuit
10%
Transmission control module internal fault causing false detection
Diagnostic Steps
1
Step 1: Visually inspect the transmission wiring harness for chafing, damage, or contact with hot/sharp surfaces
2
Step 2: Disconnect pressure control solenoid B connector and inspect for corrosion, bent pins, or moisture intrusion
3
Step 3: Measure resistance of solenoid B (typically 3-30 ohms) and check for shorts to ground with solenoid disconnected
4
Step 4: Perform wiggle test on wiring harness while monitoring live data to reproduce intermittent short
5
Step 5: If wiring and connector are good, replace pressure control solenoid B and retest
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 B. This solenoid regulates hydraulic pressure for specific clutch packs or gear engagement, and the intermittent nature suggests a wiring or connector issue rather than complete failure.
The most common cause of P1902 (Pressure Control Solenoid "B" Intermittent Short) is: Damaged or chafed wiring harness causing intermittent short to ground
Typical repair costs for P1902 range from $150 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
May cause harsh or delayed shifting, potential transmission slip, and reduced drivability. Vehicle is usually safe to drive short distances but should be repaired promptly to prevent transmission damage.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1902 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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