The P0874 code is a diagnostic trouble code (DTC) that indicates an issue with the Transmission Fluid Pressure Sensor/Switch “C” circuit. This code is triggered when the engine control module (ECM) detects a problem related to the transmission fluid pressure sensor.
What Does the P0874 Code Mean?
In essence, the P0874 code signifies that the Transmission Control Module (TCM) is receiving an intermittent signal from the Transmission Fluid Pressure Sensor. This sensor is crucial for monitoring the hydraulic pressure within the transmission, which impacts shifting and overall transmission functionality.
What Causes the P0874 Code?
- Failure of the Transmission Control Module (TCM)
- Malfunctioning transmission fluid pressure sensor
- Wiring issues, such as damaged or corroded connectors
What Are the Symptoms of the P0874 Code?
- Transmission may not shift properly
- Increased fuel consumption
How Serious Is the P0874 Code?
The P0874 code is considered urgent. If left unaddressed, it can lead to severe damage to the transmission, potentially resulting in costly repairs or complete transmission failure. Therefore, immediate attention is recommended.
How to Diagnose the P0874 Code
To properly diagnose the P0874 code, a mechanic will typically follow these steps:
- Use an OBD-II scanner to confirm the P0874 code.
- Inspect the transmission fluid level and condition.
- Examine the wiring and connectors associated with the transmission fluid pressure sensor.
- Test the Transmission Fluid Pressure Sensor for proper operation.
- Check the TCM for faults and functionality.
Common Repairs for the P0874 Code
- Replacing the transmission fluid pressure sensor
- Repairing or replacing damaged wiring or connectors
- Replacing the Transmission Control Module (if necessary)
How Much Does It Cost to Fix the P0874 Code?
The cost to fix the P0874 code can vary significantly based on the underlying issue. On average, repairs can range from $100 to $1,500, depending on whether a sensor replacement, wiring repair, or TCM replacement is required.
Can I Fix the P0874 Code Myself?
While some DIY enthusiasts may attempt to fix the P0874 code themselves, it is important to have a solid understanding of automotive electrical systems and transmission mechanics. If you are not confident in your skills, seeking professional help is recommended to avoid further damage.
