P0873 2014 GMC Sierra Code - Transmission Fluid Pressure Switch 3 Circuit High Voltage
Quick Answer
The transmission fluid pressure switch, also known as the pressure switch manifold, is a multiple switch assembly made up of 3 normally open pressure switches and 1 normally closed pressure switch. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control Solenoid Valve Assembly. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0873 2014 GMC Sierra indicates Transmission Fluid Pressure Switch 3 Circuit High Voltage.
- Common causes
- Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control Solenoid Valve Assembly.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0873 2014 GMC Sierra Description
What are the Possible Causes of the DTC P0873 2014 GMC Sierra?
- Low transmission fluid level
- Dirty transmission fluid
- Faulty Transmission Control Solenoid Valve Assembly
- Transmission Control Solenoid Valve Assembly harness is open or shorted
- Transmission Control Solenoid Valve Assembly circuit poor electrical connection
- Faulty Transmission Control Module (TCM)
How to Fix the DTC P0873 2014 GMC Sierra?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0873 2014 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0873 2014 GMC Sierra Code
1. What does the OBDII code P0873 mean on a 2014 GMC Sierra?
P0873 indicates a high voltage issue in the Transmission Fluid Pressure Switch 3 Circuit, which monitors hydraulic pressure in the transmission.
2. What are the common symptoms of code P0873 in a 2014 GMC Sierra?
Symptoms include harsh or erratic shifting, the transmission being stuck in a single gear (limp mode), and the illumination of the check engine light.
3. What causes the P0873 code to appear on a 2014 GMC Sierra?
Common causes include a faulty transmission fluid pressure switch, wiring or connector issues, a damaged transmission control module (TCM), or low or dirty transmission fluid.
4. Can driving with the P0873 code damage my 2014 GMC Sierra?
Yes, continuing to drive with this code can cause further damage to the transmission due to improper fluid pressure regulation.
5. How do I troubleshoot the P0873 code on my GMC Sierra?
Begin by checking the transmission fluid level and condition, inspecting the wiring and connectors for damage, and testing the pressure switch with a multimeter.
6. How much does it cost to repair the P0873 code on a 2014 GMC Sierra?
Repair costs depend on the underlying issue but can range from $100 for wiring repairs to $500 or more if the pressure switch or TCM needs replacement.
7. Can a dirty or clogged transmission filter cause the P0873 code?
Yes, a clogged transmission filter can restrict fluid flow and cause pressure issues that may trigger the code.
8. Do I need to replace the transmission fluid pressure switch if I get the P0873 code?
Not always; the switch should only be replaced if testing confirms it is faulty. Other issues, such as wiring problems, might also be the cause.
9. Will clearing the P0873 code with a scanner fix the issue?
Clearing the code may turn off the warning light temporarily, but the issue will likely return unless the root cause is resolved.
10. Is the P0873 code related to low transmission fluid in a 2014 GMC Sierra?
Low transmission fluid can contribute to pressure issues that trigger the P0873 code, so it’s important to check and refill if necessary.
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