P1879 Code - Problem in CVT Start Clutch Pressure Control Valve Assembly Circuit
Quick Answer
The diagnostic trouble code P1879 indicates a problem in the CVT (Continuously Variable Transmission) Start Clutch Pressure Control Valve Assembly Circuit. Common causes include Faulty wiring or connectors in the pressure control valve circuit, Malfunctioning pressure control valve assembly, Issues with the transmission control module. 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
- P1879 indicates Problem in CVT Start Clutch Pressure Control Valve Assembly Circuit.
- Common causes
- Common causes include Faulty wiring or connectors in the pressure control valve circuit, Malfunctioning pressure control valve assembly, Issues with the transmission control module.
- 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 P1879 Description
The diagnostic trouble code P1879 indicates a problem in the CVT (Continuously Variable Transmission) Start Clutch Pressure Control Valve Assembly Circuit. In vehicles equipped with a CVT, the start clutch is responsible for engaging and disengaging the transmission to allow the vehicle to start moving smoothly. The pressure control valve assembly plays a crucial role in regulating the pressure within the start clutch system, ensuring proper operation and smooth shifting.
Common Causes of P1879
- Faulty wiring or connectors in the pressure control valve circuit
- Malfunctioning pressure control valve assembly
- Issues with the transmission control module
- Electrical problems in the CVT system
- Wear and tear on transmission components
Symptoms of P1879
- Rough or jerky shifting
- Delayed engagement when starting the vehicle
- Transmission slipping
- Reduced fuel efficiency
- Illumination of the Check Engine Light
How to Fix P1879
- Diagnose the exact cause of the issue using a scan tool to pinpoint the source of the problem within the CVT start clutch pressure control valve assembly circuit.
- Inspect the wiring, connectors, and pressure control valve assembly for any damage or malfunction.
- Replace any faulty components, such as damaged wiring, connectors, or the pressure control valve assembly.
- Clear the diagnostic trouble codes and reset the transmission control module to ensure proper operation.
- Test drive the vehicle to verify that the issue has been resolved and that the CVT system is functioning correctly.
Cost to Fix P1879
The typical repair costs for addressing a P1879 code related to the CVT start clutch pressure control valve assembly circuit can vary depending on the specific cause of the issue and the vehicle's make and model. In general, the cost of parts for this repair can range from $200 to $500, while labor costs can be between $200 to $400. Overall, the total repair cost can amount to anywhere from $400 to $900. It is important to note that these are rough estimates, and actual costs may vary based on the factors mentioned earlier. It is advisable to consult with a trusted auto repair shop for a more accurate cost estimate.
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Code P1879 Information for Specific Makes
- P1879 Acura — Problem in CVT Start Clutch Pressure Control Valve Assembly Circuit
- P1879 Honda — Problem in CVT Start Clutch Pressure Control Valve Assembly Circuit
- P1879 Mitsubishi — Gear Block 4th
Frequently Asked Questions about P1879 Code
1. What does OBDII code P1879 indicate?
Code P1879 indicates a problem in the CVT start clutch pressure control valve assembly circuit, which affects the transmission's ability to regulate pressure for smooth clutch engagement.
2. What are the symptoms of the P1879 code?
Symptoms may include transmission slippage, rough shifting, decreased acceleration, warning lights on the dashboard, or the vehicle going into limp mode.
3. What causes the P1879 code to appear?
Common causes include a faulty CVT start clutch pressure control valve, damaged wiring or connectors in the circuit, low or dirty transmission fluid, or a failing transmission control module (TCM).
4. Can driving with the P1879 code damage the vehicle?
Yes, continuing to drive with this code active can cause further damage to the transmission or related components, leading to costly repairs.
5. How is the P1879 code diagnosed?
A technician will inspect the wiring and connectors, check the transmission fluid condition, test the CVT start clutch pressure control valve, and use a scan tool to monitor live data from the transmission system.
6. Can low transmission fluid trigger the P1879 code?
Yes, low or contaminated transmission fluid can cause improper pressure regulation, leading to the activation of this code.
7. How do you fix the P1879 code?
Repairs may involve replacing the CVT start clutch pressure control valve, repairing or replacing damaged wiring, flushing and refilling the transmission fluid, or reprogramming the TCM if necessary.
8. What tools are needed to troubleshoot the P1879 code?
Basic tools include a scan tool, multimeter, and transmission fluid testing equipment. Advanced diagnostics may require manufacturer-specific tools.
9. Is the P1879 code specific to any particular vehicle?
This code is commonly associated with vehicles equipped with continuously variable transmissions (CVTs) and may be more prevalent in certain makes and models. Check your vehicle's service manual for details.
10. How much does it cost to repair the P1879 code?
Repair costs vary depending on the root cause, but they typically range from $150 to $1,000, with valve replacement or wiring repairs being less expensive than major transmission work.
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