Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with a part in your car that helps control the transmission fluid pressure. It's like a tiny valve that isn't working right.
The code P170C indicates an issue with the monitoring of the pressure control solenoid 'C', which is responsible for regulating hydraulic pressure in the transmission.
The pressure control solenoid 'C' is part of the automatic transmission system. It helps manage the pressure of the transmission fluid, which is crucial for smooth gear shifts. The shunt monitoring aspect refers to the solenoid's ability to handle excess current or voltage, ensuring it operates within safe parameters.
• Harsh or erratic shifting
• Transmission slipping
• Illuminated check engine light
• Faulty pressure control solenoid 'C'
• Wiring issues or poor electrical connections
• Transmission control module (TCM) malfunction
Solenoid: An electromechanical device used to control the flow of fluid or air.
Transmission Control Module (TCM): A computer that controls the operation of the transmission.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the pressure control solenoid 'C' for proper operation.
• Replace the faulty pressure control solenoid.
• Repair or replace damaged wiring or connectors.
• Update or replace the transmission control module if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regular transmission fluid changes
• Routine inspection of transmission components
• Prompt repair of any transmission issues
Transmission Control Issue
• Avoid driving the vehicle until the issue is resolved to prevent further damage.
• Consult a professional mechanic for a thorough diagnosis.
Transmission components may be covered under the powertrain warranty. Check with your vehicle manufacturer.
This code has been associated with vehicles experiencing transmission issues due to solenoid failures, particularly in older models.
High – Transmission issues can lead to serious vehicle performance problems if not addressed promptly.
Driving with transmission issues can be unsafe and may lead to further damage. Address this code as soon as possible.
• Vehicle at operating temperature
• Transmission in drive mode
The pressure control solenoid 'C' is located inside the transmission, accessible by removing the transmission pan.
Q: Can I drive with a P170C code?
A: It's not recommended to drive with this code, as it can lead to further transmission damage.
Q: How do I reset the check engine light after repairs?
A: Use an OBD-II scanner to clear the code after completing repairs.
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