OBD Code P1910: Pressure Control Solenoid "C" Intermittent Short

Q: What does OBD code P1910 mean?

Pressure Control Solenoid "C" Intermittent Short. The pressure control solenoid C has an intermittent electrical short, like a light switch that randomly touches the metal frame. This causes the transmission fluid pressure to fluctuate unpredictably.

Q: What are the symptoms of fault code P1910?

Transmission shifting harshly or erratically, Check engine light illuminated intermittently, Loss of power or limp mode activation

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What This Actually Means

In plain language — no jargon

The pressure control solenoid C has an intermittent electrical short, like a light switch that randomly touches the metal frame. This causes the transmission fluid pressure to fluctuate unpredictably.

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Symptoms You May Notice

3 known symptoms for this code

Transmission shifting harshly or erratically

Check engine light illuminated intermittently

Loss of power or limp mode activation

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How Your ECU Detects This

Technical sensor logic and voltage thresholds

The ECM monitors the solenoid's resistance and electrical continuity. An intermittent short causes the circuit voltage to drop below expected levels unpredictably, triggering the fault code when the short occurs.

Voltage & Parameter Thresholds

Parameter	Normal Range	Fault Condition
Solenoid Resistance	4-8 ohms	Short to ground (0-2 ohms intermittent)
Circuit Voltage	12V when commanded	Drops below 8V intermittently

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Diagnostic & DIY Fix Guide

Check these in order — from cheapest to most complex

1

Wiring harness connector at solenoid C

Inspect for corrosion, loose pins, or damaged insulation and reseat the connector firmly.

2

Transmission fluid

Drain and replace fluid to remove contaminants causing electrical bridging.

3

Pressure Control Solenoid C

Replace the solenoid if resistance testing confirms internal short or winding damage.

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When to See a Professional Mechanic

Not all fault codes are safe to DIY

Code P1910 is a moderate fault. You can generally drive to a workshop, but avoid long trips or high-load driving (motorway, uphill towing) until it is diagnosed. If the code keeps returning after clearing, or if you notice the symptoms listed above worsening, do not delay professional diagnosis. Many moderate codes have multiple possible root causes — a mechanic with live OBD data can identify the exact fault more efficiently than part-by-part trial and error.

Safety note: OBD-II codes identify the system or circuit where a fault was detected — they do not always identify the exact failed component. A professional mechanic using live sensor data will diagnose the root cause more accurately than replacing parts based on the code alone.

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How to Clear Code P1910

What happens after you fix the fault

Once the fault is repaired, P1910 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.

The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.

✅ Safe to Clear When

Fault has been diagnosed and repaired
You want to confirm the repair worked
Code appeared after a sensor was cleaned

⚠️ Do Not Clear When

Preparing for an emissions/PUC test
Root cause is still undiagnosed
Check engine light is flashing

Emissions test note: Clearing codes resets OBD readiness monitors. Most vehicles need 50–100 km of mixed driving before monitors complete. Do not clear codes immediately before an emissions or PUC inspection.