P0990 2014 Chevrolet Silverado Code - Transmission Fluid Pressure Switch 5 Circuit High Voltage
Quick Answer
The P0990 diagnostic trouble code (DTC) for a 2014 Chevrolet Silverado refers to an issue with the Transmission Fluid Pressure Switch 5 Circuit High Voltage. Common causes include Several factors can trigger the P0990 code in a 2014 Chevrolet Silverado, Some common causes include a faulty transmission fluid pressure switch, damaged wiring or connectors in the transmission fluid pressure switch circuit, low transmission fluid levels or contaminated fluid, a malfunctioning PCM, or internal transmission issues such as a failing solenoid or valve body. 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
- P0990 2014 Chevrolet Silverado indicates Transmission Fluid Pressure Switch 5 Circuit High Voltage.
- Common causes
- Common causes include Several factors can trigger the P0990 code in a 2014 Chevrolet Silverado, Some common causes include a faulty transmission fluid pressure switch, damaged wiring or connectors in the transmission fluid pressure switch circuit, low transmission fluid levels or contaminated fluid, a malfunctioning PCM, or internal transmission issues such as a failing solenoid or valve body.
- 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 P0990 2014 Chevrolet Silverado Description
The P0990 diagnostic trouble code (DTC) for a 2014 Chevrolet Silverado refers to an issue with the Transmission Fluid Pressure Switch 5 Circuit High Voltage. This code indicates that the powertrain control module (PCM) has detected a higher than normal voltage signal coming from the transmission fluid pressure switch 5 circuit. The transmission fluid pressure switch is responsible for monitoring the hydraulic pressure inside the transmission and sending this information to the PCM. When the PCM detects a high voltage signal from this switch, it signifies an electrical malfunction that can affect the transmission's performance.
Common Causes of P0990 2014 Chevrolet Silverado
Several factors can trigger the P0990 code in a 2014 Chevrolet Silverado. Some common causes include a faulty transmission fluid pressure switch, damaged wiring or connectors in the transmission fluid pressure switch circuit, low transmission fluid levels or contaminated fluid, a malfunctioning PCM, or internal transmission issues such as a failing solenoid or valve body.
Symptoms of P0990 2014 Chevrolet Silverado
The following symptoms may be associated with the P0990 code:
- Erratic shifting or difficulty changing gears
- Harsh or delayed gear changes
- Transmission slipping
- Transmission overheating
- Illumination of the Check Engine Light
How to Fix P0990 2014 Chevrolet Silverado
To address the P0990 code in a 2014 Chevrolet Silverado, the following steps can be taken:
- Diagnose the issue by using a scan tool to retrieve the trouble codes and examining the transmission fluid pressure switch 5 circuit for any visible damage.
- Inspect the wiring and connectors associated with the transmission fluid pressure switch for any signs of wear, corrosion, or loose connections.
- Check the transmission fluid level and quality to ensure it meets the manufacturer's specifications. If necessary, perform a transmission fluid flush and refill.
- Test the transmission fluid pressure switch for proper operation and replace it if it is found to be faulty.
- Clear the DTCs from the PCM memory and perform a test drive to verify that the issue has been resolved.
Cost to Fix P0990 2014 Chevrolet Silverado
The typical repair costs for addressing the P0990 code in a 2014 Chevrolet Silverado can vary depending on the specific cause of the issue. On average, the parts required for this repair, such as a transmission fluid pressure switch, wiring harness, or transmission fluid, may cost between $100 and $300. The labor costs for diagnosis and repair can range from $150 to $500, depending on the shop's hourly rates and the extent of the work required. It is advisable to consult with a professional mechanic or auto repair shop for a more accurate cost estimate based on the vehicle's condition and the specific repair needed.
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Frequently Asked Questions about P0990 2014 Chevrolet Silverado Code
What does the OBDII code P0990 mean on a 2014 Chevrolet Silverado?
The P0990 code indicates a high voltage issue in the Transmission Fluid Pressure Switch 5 Circuit, which helps monitor and regulate transmission fluid pressure.
What are the common symptoms of the P0990 code?
Symptoms may include harsh or delayed shifting, the transmission stuck in one gear, poor fuel efficiency, and the Check Engine Light being illuminated.
What causes the P0990 code to appear on a 2014 Chevrolet Silverado?
Common causes include faulty pressure switches, damaged wiring or connectors in the circuit, a failing transmission control module (TCM), or low transmission fluid levels.
Can I continue driving my Silverado with the P0990 code?
Driving with this code is not recommended, as it may lead to further transmission damage or unsafe driving conditions due to shifting issues.
How do I diagnose the P0990 code in my truck?
Start by checking the transmission fluid level and condition, inspecting wiring and connectors for damage, and testing the pressure switch and circuit for proper voltage and resistance.
What should I check first if my Silverado shows the P0990 code?
Begin by checking the transmission fluid for proper level and cleanliness, as low or dirty fluid can contribute to sensor malfunctions.
How much does it cost to repair the P0990 code?
Repair costs vary depending on the issue, ranging from $100 for simple wiring repairs to $300 or more for replacing the pressure switch or related components.
Is the P0990 code related to transmission failure?
While the P0990 code itself doesn’t indicate total transmission failure, ignoring it can lead to further damage and expensive repairs if not addressed promptly.
Can a software update fix the P0990 code?
In some cases, a TCM software update from the dealer may resolve the issue if the problem is related to the control module's programming.
Do I need a professional mechanic to fix the P0990 code?
While basic checks like inspecting fluid or wiring can be done at home, diagnosing and repairing transmission circuits often requires specialized tools and expertise.
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