AutoCodes – Volvo – P0798 Volvo

P0798 Volvo Code - Pressure Control Solenoid 'C' Electrical

Quick Answer

This fault code is stored in the electronic control module when a malfunction is detected with the pressure control solenoid circuit. Common causes include Faulty Transmission Fluid Pressure Solenoid, Transmission Fluid Pressure Solenoid harness is open or shorted, Transmission Fluid Pressure Solenoid circuit poor electrical connection. 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: P0798 Volvo indicates Pressure Control Solenoid 'C' Electrical.
Common causes: Common causes include Faulty Transmission Fluid Pressure Solenoid, Transmission Fluid Pressure Solenoid harness is open or shorted, Transmission Fluid Pressure Solenoid circuit poor electrical connection.
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 Popularity 1,453

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Feb 10, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0798 Volvo Description

This fault code is stored in the electronic control module when a malfunction is detected with the pressure control solenoid circuit. The mechanical condition of the transmission should be inspected prior to any electrical fault finding. An actuator test can be carried out on the pressure control solenoid and a current clamp can be used to monitor the condition of the winding. Electrical tests such as winding resistance, checking for short to power or short to ground can be carried out also. Normally the resistance of a solenoid winding is 10 to 25 Ohms, however, manufacturer specifications should be checked.

OBDII Code P0798 Volvo - Pressure Control Solenoid 'C' Electrical - AutoCodes.com — P0798 Volvo Code - Pressure Control Solenoid 'C' Electrical

What does this mean?

What are the Possible Causes of the DTC P0798 Volvo?

Faulty Transmission Fluid Pressure Solenoid
Transmission Fluid Pressure Solenoid harness is open or shorted
Transmission Fluid Pressure Solenoid circuit poor electrical connection

How to Fix the DTC P0798 Volvo?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0798 Volvo code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0798 Volvo Code

1. What are the common symptoms of OBDII code P0798 in a Volvo related to the Pressure Control Solenoid 'C' Electrical?

Common symptoms include harsh shifting, erratic shifting patterns, transmission slippage, and possibly the transmission going into limp mode.

2. What are some possible causes of OBDII code P0798 in a Volvo?

Possible causes include a faulty pressure control solenoid 'C', damaged wiring or connectors in the solenoid circuit, low transmission fluid levels, or internal transmission issues.

3. How can I diagnose the cause of OBDII code P0798 in my Volvo?

Diagnosis typically involves using a scan tool to retrieve the trouble code and then conducting a thorough inspection of the pressure control solenoid 'C', checking for damaged wires or connectors, and ensuring proper transmission fluid levels.

4. Can I continue driving my Volvo with OBDII code P0798 present?

It is not recommended to continue driving your vehicle with this code present, as it can lead to further damage to the transmission. It is best to address the issue promptly.

5. What repairs are typically needed to fix OBDII code P0798 in a Volvo?

Repairs may include replacing the pressure control solenoid 'C', repairing or replacing damaged wiring or connectors, ensuring proper transmission fluid levels, and addressing any internal transmission issues.

6. Are there any DIY tips for troubleshooting OBDII code P0798 in my Volvo?

While diagnosing and repairing transmission issues can be complex, you can start by checking the transmission fluid level and condition, inspecting the wiring and connectors related to the pressure control solenoid, and clearing the code to see if it returns.

7. How much does it cost to repair OBDII code P0798 in a Volvo?

The cost of repairing this code can vary depending on the underlying cause, the extent of the repairs needed, and labor rates. It is advisable to consult with a trusted mechanic or dealership for an accurate estimate.

8. Can a faulty pressure control solenoid 'C' cause other transmission issues in a Volvo?

Yes, a faulty pressure control solenoid 'C' can cause a range of transmission problems beyond just triggering OBDII code P0798, such as poor shifting performance, gear slippage, and potential transmission failure if left unresolved.

9. Is OBDII code P0798 a common issue in Volvos?

While it may not be as common as some other OBDII codes, issues related to the pressure control solenoid 'C' can occur in Volvos, especially in older vehicles or ones with high mileage.

10. How long does it typically take to repair OBDII code P0798 in a Volvo?

The repair time can vary depending on the exact cause of the code and the extent of the repairs needed. It could range from a few hours to a full day, depending on the complexity of the issue and the availability of parts.