P0873 2017 Chevrolet Silverado Code - Transmission Fluid Pressure Switch 3 Circuit High Voltage
Quick Answer
The P0873 diagnostic trouble code (DTC) for a 2017 Chevrolet Silverado refers to an issue with the Transmission Fluid Pressure Switch 3 Circuit High Voltage. Common causes include Faulty transmission fluid pressure switch, Wiring issues or shorts in the circuit, Malfunctioning PCM. 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 2017 Chevrolet Silverado indicates Transmission Fluid Pressure Switch 3 Circuit High Voltage.
- Common causes
- Common causes include Faulty transmission fluid pressure switch, Wiring issues or shorts in the circuit, Malfunctioning PCM.
- 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.
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Code P0873 2017 Chevrolet Silverado Description
The P0873 diagnostic trouble code (DTC) for a 2017 Chevrolet Silverado refers to an issue with the Transmission Fluid Pressure Switch 3 Circuit High Voltage. This code indicates that the powertrain control module (PCM) has detected a high voltage signal from the transmission fluid pressure switch 3 circuit. The transmission fluid pressure switch is responsible for monitoring the hydraulic pressure in the transmission system. When the PCM detects a high voltage signal from this switch, it means that the transmission fluid pressure is higher than the specified range.
Common Causes of P0873 2017 Chevrolet Silverado
- Faulty transmission fluid pressure switch
- Wiring issues or shorts in the circuit
- Malfunctioning PCM
- Problems with the transmission fluid pump
- Low transmission fluid levels
Symptoms of P0873 2017 Chevrolet Silverado
- Harsh shifting
- Slipping gears
- Delayed engagement
- Transmission overheating
- Illumination of the Check Engine Light
How to Fix P0873 2017 Chevrolet Silverado
- Begin by diagnosing the root cause of the issue using a scan tool to retrieve the DTC and perform a thorough inspection of the transmission fluid pressure switch and related components.
- Inspect the wiring harness for any signs of damage, corrosion, or loose connections. Repair or replace any damaged wiring as needed.
- Test the transmission fluid pressure switch for proper operation and replace it if it is found to be faulty.
- Check the transmission fluid level and condition. Top off the fluid if necessary and perform a transmission fluid flush if the fluid is contaminated.
- Clear the DTC from the PCM memory and test drive the vehicle to ensure that the issue has been resolved.
Cost to Fix P0873 2017 Chevrolet Silverado
The typical repair costs for addressing a P0873 code on a 2017 Chevrolet Silverado can range from $200 to $500, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour for labor, but rates may be higher in metropolitan areas or at dealerships. Independent shops often offer lower labor rates. It's recommended to obtain quotes from local repair shops for a more accurate cost estimate.
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Frequently Asked Questions about P0873 2017 Chevrolet Silverado Code
What does the OBDII code P0873 mean on a 2017 Chevrolet Silverado?
The P0873 code indicates a high voltage issue in the Transmission Fluid Pressure Switch 3 Circuit, which monitors hydraulic pressure in the transmission.
What are the common symptoms of code P0873 in a 2017 Chevrolet Silverado?
Symptoms may include harsh or delayed shifting, transmission slippage, reduced fuel efficiency, or the transmission entering limp mode.
What causes the P0873 code in a 2017 Chevrolet Silverado?
Common causes include a faulty transmission fluid pressure switch, damaged wiring or connectors in the circuit, low transmission fluid levels, or a failing transmission control module (TCM).
Can driving with the P0873 code damage my Silverado?
Yes, driving with this code for an extended period can cause further damage to the transmission, especially if the vehicle is stuck in limp mode or experiencing shifting issues.
How do I diagnose the P0873 code on my Silverado?
Diagnosis involves checking the transmission fluid level and condition, inspecting wiring and connectors for damage, testing the pressure switch, and using a scan tool to monitor live data and voltage readings.
How can I fix the P0873 code on a 2017 Chevrolet Silverado?
Repairs may include replacing the faulty pressure switch, repairing or replacing damaged wiring or connectors, topping off or replacing the transmission fluid, or reprogramming or replacing the TCM if necessary.
What tools are needed to troubleshoot the P0873 code?
You’ll need an OBDII scan tool, a multimeter to test wiring and voltage, and possibly a transmission pressure gauge for more advanced diagnostics.
Does the P0873 code mean I need a new transmission?
Not necessarily. The issue is often related to the pressure switch or wiring rather than requiring a full transmission replacement. Proper diagnosis is essential.
How much does it cost to repair the P0873 code on a Silverado?
Repair costs can range from $150 to $500 depending on whether the issue is a faulty pressure switch, wiring repair, or a more complex TCM problem.
Can low transmission fluid cause the P0873 code?
Yes, low or dirty transmission fluid can lead to improper hydraulic pressure and trigger this code. Always check fluid levels first.
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