P0873 Code - Transmission Fluid Pressure Sensor/Switch 'C' Circuit High
Quick Answer
The diagnostic trouble code P0873 indicates that there is a high voltage condition in the Transmission Fluid Pressure Sensor/Switch 'C' circuit. Common causes include Faulty transmission fluid pressure sensor/switch, Wiring issues or electrical connections, Low transmission fluid level. 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 indicates Transmission Fluid Pressure Sensor/Switch 'C' Circuit High.
- Common causes
- Common causes include Faulty transmission fluid pressure sensor/switch, Wiring issues or electrical connections, Low transmission fluid level.
- 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 Description
The diagnostic trouble code P0873 indicates that there is a high voltage condition in the Transmission Fluid Pressure Sensor/Switch 'C' circuit. This sensor is responsible for monitoring the fluid pressure within the transmission. When the voltage in the circuit is higher than normal, it can affect the transmission's performance and lead to various issues. This can impact the vehicle's shifting patterns, causing rough or delayed shifts, or even preventing the transmission from shifting at all. If left unaddressed, it can lead to further damage to the transmission and other related components.
Common Causes of P0873
- Faulty transmission fluid pressure sensor/switch
- Wiring issues or electrical connections
- Low transmission fluid level
- Contaminated or degraded transmission fluid
- Internal transmission problems
Symptoms of P0873
- Harsh or delayed shifting
- Transmission slipping
- Transmission overheating
- Transmission fluid leaks
- Check Engine Light illuminated
How to Fix P0873
- Perform a diagnostic scan to confirm the P0873 code and identify the exact issue.
- Inspect the wiring and connections related to the transmission fluid pressure sensor/switch.
- Check the transmission fluid level and condition, topping up or replacing if necessary.
- Replace the transmission fluid pressure sensor/switch if it is found to be faulty.
- Test drive the vehicle to ensure the issue has been resolved and clear the trouble code.
Cost to Fix P0873
The typical repair cost for addressing the P0873 code can range from $200 to $500, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. It is recommended to inquire with local auto repair shops to obtain a more accurate estimate.
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Code P0873 Information for Specific Makes
- P0873 Acura — 4th Clutch Transmission Fluid Pressure Switch Short Or Stuck OFF
- P0873 Buick — Transmission Fluid Pressure Switch 3 Circuit High Voltage
- P0873 Cadillac — Transmission Fluid Pressure Switch 3 Circuit High Voltage
- P0873 Chevrolet — Transmission Fluid Pressure Switch 3 Circuit High Voltage
- P0873 Dodge — Transmission Fluid Pressure Sensor/Switch 'C' Circuit High
- P0873 GMC — Transmission Fluid Pressure Switch 3 Circuit High Voltage
- P0873 Honda — 4th Clutch Transmission Fluid Pressure Switch Short Or Stuck OFF
- P0873 Pontiac — Transmission Fluid Pressure Sensor/Switch 'C' Circuit High
- P0873 Saturn — Transmission Fluid Pressure Sensor/Switch 'C' Circuit High
- P0873 Toyota — Transmission Fluid Pressure Sensor/Switch 'C' Circuit High
Frequently Asked Questions about P0873 Code
What does OBDII code P0873 mean?
Code P0873 indicates a high voltage signal in the Transmission Fluid Pressure Sensor/Switch 'C' circuit, suggesting an issue with the sensor or related components.
What are the symptoms of code P0873?
Common symptoms include transmission slipping, harsh shifting, erratic gear changes, or activation of the check engine light.
What causes code P0873?
Possible causes include a faulty transmission fluid pressure sensor, damaged wiring or connectors, a malfunctioning transmission control module (TCM), or low/high transmission fluid levels.
Can I drive with code P0873?
Driving with this code is not recommended, as it may lead to further damage to the transmission and cause unsafe driving conditions.
How do I diagnose code P0873?
Diagnosis typically involves inspecting the transmission fluid pressure sensor, checking wiring and connectors for damage, using a multimeter to test sensor voltage, and scanning the TCM for additional codes.
How do I fix code P0873?
Repairs may include replacing the transmission fluid pressure sensor, repairing or replacing damaged wiring or connectors, updating or reprogramming the TCM, and ensuring proper transmission fluid levels.
Does code P0873 always mean the sensor is bad?
No, the issue could stem from wiring problems, fluid contamination, or a malfunction in the TCM rather than the sensor itself.
Will clearing the code fix the problem?
Clearing the code may temporarily remove the check engine light, but the underlying issue must be repaired to prevent the code from returning.
How much does it cost to repair code P0873?
Repair costs vary depending on the root cause but may range from $150 to $400 for sensor replacement, wiring repairs, or TCM updates.
Can low transmission fluid cause code P0873?
Yes, low or contaminated transmission fluid can affect pressure readings and trigger this code. Always check fluid levels and quality.
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