P1908 Pressure Control Solenoid “C” Short Circuit

How to Diagnose and Solve P1908 Pressure Control Solenoid “C” Short Circuit Issues


Are you a car enthusiast who loves to get your hands dirty? Or perhaps you’re a DIYer who enjoys the satisfaction of fixing things yourself? If so, you’re in the right place. Today, we’re going to delve into the world of car diagnostics, specifically focusing on the P1908 Pressure Control Solenoid “C” Short Circuit issue.

Understanding the P1908 Code

First things first, let’s understand what the P1908 code means. This code is a generic powertrain diagnostic trouble code (DTC) that indicates a problem with the pressure control solenoid “C”. When your car’s computer detects a short circuit in this solenoid, it triggers the P1908 code.

What is a Pressure Control Solenoid?

A pressure control solenoid is a crucial component in your car’s automatic transmission system. It controls the fluid pressure to the clutches and bands, which in turn control gear shifting. If this solenoid malfunctions, it can lead to a variety of transmission problems.

Signs of a P1908 Code Issue

Before we dive into the diagnosis and solution, let’s look at some common signs that indicate a P1908 code issue. These include:

car vertical

1. Check Engine Light is on
2. Transmission slipping
3. Poor fuel economy
4. Difficulty shifting gears

Diagnosing the P1908 Code Issue

Now that we know what to look for, let’s move on to diagnosing the issue. Here’s a step-by-step guide:

Step 1: Use an OBD-II Scanner

The first step in diagnosing a P1908 code issue is to use an OBD-II scanner. This device can read the trouble codes stored in your car’s computer and help you identify the problem.

Step 2: Inspect the Wiring and Connectors

Next, inspect the wiring and connectors leading to the pressure control solenoid. Look for any signs of damage, corrosion, or loose connections.

Step 3: Test the Pressure Control Solenoid

If the wiring and connectors are in good condition, the next step is to test the pressure control solenoid itself. This can be done using a multimeter.

Solving the P1908 Code Issue

Once you’ve diagnosed the issue, it’s time to solve it. Here’s how:

Step 1: Replace Damaged Wiring or Connectors

If you found any damaged wiring or connectors during your inspection, replace them.

Step 2: Replace the Pressure Control Solenoid

If the pressure control solenoid is faulty, it will need to be replaced. This is a job best left to professionals, as it involves disassembling the transmission.

Step 3: Clear the Trouble Codes

After fixing the issue, use your OBD-II scanner to clear the trouble codes. Then, take your car for a test drive to see if the Check Engine Light comes back on.


Dealing with a P1908 Pressure Control Solenoid “C” Short Circuit issue can be a bit daunting, but with the right knowledge and tools, it’s definitely doable. Remember, if you’re ever in doubt, it’s always best to consult with a professional. Happy fixing!


1. Can I drive my car with a P1908 code?

While it’s technically possible to drive with a P1908 code, it’s not recommended. This issue can lead to serious transmission problems if not addressed promptly.

2. How much does it cost to fix a P1908 code issue?

The cost to fix a P1908 code issue can vary greatly depending on the exact problem and your location. However, you can expect to pay anywhere from $200 to $600 for a professional repair.

3. Can I fix a P1908 code issue myself?

Yes, if you’re comfortable with car repairs and have the necessary tools, you can certainly attempt to fix a P1908 code issue yourself. However, if the pressure control solenoid needs to be replaced, it’s best to leave this to a professional.