P0873 Pontiac Code - Transmission Fluid Pressure Sensor/Switch 'C' Circuit High
Quick Answer
The P0873 diagnostic trouble code (DTC) for Pontiac vehicles indicates a problem with the Transmission Fluid Pressure Sensor/Switch 'C' Circuit registering a high voltage. Common causes include Faulty transmission fluid pressure sensor/switch 'C', Damaged wiring or connectors in the sensor circuit, Malfunctioning ECM/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 Pontiac indicates Transmission Fluid Pressure Sensor/Switch 'C' Circuit High.
- Common causes
- Common causes include Faulty transmission fluid pressure sensor/switch 'C', Damaged wiring or connectors in the sensor circuit, Malfunctioning ECM/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 Pontiac Description
The P0873 diagnostic trouble code (DTC) for Pontiac vehicles indicates a problem with the Transmission Fluid Pressure Sensor/Switch 'C' Circuit registering a high voltage. This sensor is responsible for monitoring the transmission fluid pressure within the transmission system. When the sensor detects that the pressure is too high, it sends a signal to the vehicle's engine control module (ECM) or transmission control module (TCM) to adjust the pressure accordingly. If the sensor malfunctions or sends an incorrect signal, it can lead to various issues with the transmission system.
Common Causes of P0873 Pontiac
- Faulty transmission fluid pressure sensor/switch 'C'
- Damaged wiring or connectors in the sensor circuit
- Malfunctioning ECM/TCM
- Low transmission fluid levels
- Contaminated or degraded transmission fluid
Symptoms of P0873 Pontiac
- Harsh shifting of the transmission
- Slipping or delayed engagement when shifting gears
- Fail-safe mode activated in the transmission
- Check engine light illuminated on the dashboard
How to Fix P0873 Pontiac
- Begin by conducting a visual inspection of the transmission fluid pressure sensor/switch 'C', wiring, and connectors for any visible damage or corrosion.
- Use a multimeter to test the sensor's resistance and verify if it is within the manufacturer's specifications.
- Check the transmission fluid level and condition, topping off or replacing the fluid if necessary.
- If the sensor is faulty, replace it with a new one and ensure proper installation and calibration.
- Clear the DTC using a diagnostic scanner and test drive the vehicle to confirm that the code does not return.
Cost to Fix P0873 Pontiac
The typical repair costs for addressing a P0873 code on a Pontiac vehicle can range from $150 to $400, depending on the specific cause of the issue and the cost of parts and labor. Keep in mind that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check local rates for a more accurate estimate. Additionally, factors such as the vehicle's make and model, engine type, and location can also impact the overall repair costs.
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Frequently Asked Questions about P0873 Pontiac Code
What does the OBDII code P0873 mean for a Pontiac?
The code P0873 indicates that the Transmission Fluid Pressure Sensor/Switch 'C' Circuit has a high voltage reading, suggesting an issue with the sensor or related wiring.
What are the common symptoms of code P0873 in a Pontiac?
Symptoms may include transmission slipping, harsh shifting, failure to engage certain gears, or the transmission going into limp mode.
What causes the P0873 code to appear on a Pontiac?
Common causes include a faulty transmission fluid pressure sensor, damaged wiring or connectors, low transmission fluid levels, or internal transmission problems.
Can low transmission fluid trigger code P0873?
Yes, low or contaminated transmission fluid can affect pressure readings and potentially trigger the P0873 code.
How is the P0873 code diagnosed?
A mechanic will typically check the transmission fluid level, inspect the wiring and connectors for damage, test the pressure sensor, and possibly perform a scan tool live data analysis.
Can driving with code P0873 damage the transmission?
Yes, ignoring this code can lead to further damage to the transmission, especially if the issue involves low fluid or internal transmission problems.
How much does it cost to repair the P0873 code on a Pontiac?
Repair costs can vary widely, ranging from $100 for sensor replacement to over $1,000 for internal transmission repairs, depending on the root cause.
Can a faulty transmission fluid pressure sensor cause shifting problems?
Yes, a malfunctioning sensor can send incorrect data to the transmission control module, leading to improper gear shifting or limp mode activation.
Is it safe to clear the P0873 code without fixing the problem?
Clearing the code without addressing the underlying issue is not recommended, as the problem will likely persist or worsen over time.
Can a DIYer fix the P0873 code on a Pontiac?
If the issue is related to damaged wiring or a faulty sensor, a DIYer with basic tools and knowledge may be able to repair it. Complex transmission issues should be handled by a professional.
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