P0873 2018 Chevrolet Silverado Code - Transmission Fluid Pressure Switch 3 Circuit High Voltage
Quick Answer
The P0873 diagnostic trouble code (DTC) for a 2018 Chevrolet Silverado refers to an issue with the Transmission Fluid Pressure Switch 3 Circuit High Voltage. Common causes include Faulty transmission fluid pressure switch, Damaged wiring or connectors in the circuit, Malfunctioning transmission control module (TCM). 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 2018 Chevrolet Silverado indicates Transmission Fluid Pressure Switch 3 Circuit High Voltage.
- Common causes
- Common causes include Faulty transmission fluid pressure switch, Damaged wiring or connectors in the circuit, Malfunctioning transmission control module (TCM).
- 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 2018 Chevrolet Silverado Description
The P0873 diagnostic trouble code (DTC) for a 2018 Chevrolet Silverado refers to an issue with the Transmission Fluid Pressure Switch 3 Circuit High Voltage. This code indicates that there is a problem with the electrical circuit associated with the transmission fluid pressure switch 3, resulting in a higher than normal voltage reading. The transmission fluid pressure switch is a crucial component that helps regulate the hydraulic pressure within the transmission system. When the voltage is too high, it can lead to improper shifting, harsh gear changes, and potential damage to the transmission components.
Common Causes of P0873 2018 Chevrolet Silverado
- Faulty transmission fluid pressure switch
- Damaged wiring or connectors in the circuit
- Malfunctioning transmission control module (TCM)
- Low transmission fluid levels
- Electrical issues such as shorts or open circuits
Symptoms of P0873 2018 Chevrolet Silverado
- Erratic shifting patterns
- Harsh gear changes
- Transmission slipping
- Illuminated Check Engine Light
- Reduced fuel efficiency
How to Fix P0873 2018 Chevrolet Silverado
- Begin by performing a thorough inspection of the transmission fluid pressure switch 3 and its associated wiring and connectors.
- Test the transmission fluid pressure switch 3 using a multimeter to determine if it is functioning correctly.
- Check the transmission control module (TCM) for any signs of damage or malfunction.
- Inspect the transmission fluid level and top up if necessary.
- Clear the DTC and test drive the vehicle to ensure that the issue has been resolved.
Cost to Fix P0873 2018 Chevrolet Silverado
The typical repair costs for addressing a P0873 code on a 2018 Chevrolet Silverado can vary depending on the exact cause of the issue. In general, the cost of parts such as a new transmission fluid pressure switch or wiring harness can range from $50 to $200. Labor costs at auto repair shops typically range from $80 to $150 per hour. The total repair cost, including parts and labor, could amount to anywhere from $150 to $500. It is advisable to consult with a qualified mechanic or dealership to obtain a more accurate estimate based on the specific diagnosis and repair needed for your vehicle.
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Frequently Asked Questions about P0873 2018 Chevrolet Silverado Code
1. What does the OBDII code P0873 mean for a 2018 Chevrolet Silverado?
P0873 indicates that the Powertrain Control Module (PCM) has detected high voltage in the Transmission Fluid Pressure Switch 3 Circuit.
2. What are the symptoms of code P0873 in a 2018 Chevrolet Silverado?
Common symptoms include harsh or delayed shifting, transmission slipping, the transmission stuck in limp mode, and the illuminated check engine light.
3. What causes code P0873 in a 2018 Chevrolet Silverado?
Potential causes include a faulty transmission fluid pressure switch, damaged or corroded wiring/connectors in the circuit, or a malfunctioning PCM.
4. Can I drive my 2018 Chevrolet Silverado with a P0873 code?
Driving with code P0873 is not recommended, as it can lead to poor transmission performance and potential damage if the issue is not resolved.
5. How do you diagnose a P0873 code in a 2018 Chevrolet Silverado?
Diagnosis involves using a scan tool to verify the code, inspecting the Transmission Fluid Pressure Switch 3 Circuit wiring and connectors, and testing the pressure switch for proper operation.
6. How do you fix the P0873 code in a 2018 Chevrolet Silverado?
Repairs may include replacing the faulty transmission fluid pressure switch, repairing damaged wiring or connectors, or reprogramming or replacing the PCM if necessary.
7. Is the P0873 code related to low transmission fluid levels?
While low transmission fluid levels are not a direct cause of P0873, maintaining proper fluid levels is crucial for overall transmission performance and should be checked during diagnosis.
8. How much does it cost to fix a P0873 code in a 2018 Chevrolet Silverado?
Repair costs can vary but typically range between $100 and $400, depending on whether the issue involves replacing the pressure switch, repairing wiring, or reprogramming the PCM.
9. Can a weak battery or electrical issue cause the P0873 code?
Yes, electrical issues such as a weak battery, corroded connections, or poor grounding can contribute to high voltage readings in the circuit.
10. Do I need to replace the entire transmission if I get a P0873 code?
No, a P0873 code is usually resolved by addressing specific components like the pressure switch or wiring. Full transmission replacement is rarely required for this issue.
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