P3459 Chrysler Code - Cylinder 8 Deactivation Control Circuit Low
Quick Answer
The P3459 Chrysler diagnostic trouble code (DTC) specifically refers to an issue with the Cylinder 8 Deactivation Control Circuit being detected as low. Common causes include Faulty deactivation solenoid: A malfunctioning deactivation solenoid can prevent cylinder 8 from deactivating as intended, Wiring issues: Damaged or corroded wiring connections can disrupt the control circuit and prevent proper cylinder deactivation, ECM/PCM failure: A malfunction in the engine control module or powertrain control module can cause communication issues with the deactivation control circuit. 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
- P3459 Chrysler indicates Cylinder 8 Deactivation Control Circuit Low.
- Common causes
- Common causes include Faulty deactivation solenoid: A malfunctioning deactivation solenoid can prevent cylinder 8 from deactivating as intended, Wiring issues: Damaged or corroded wiring connections can disrupt the control circuit and prevent proper cylinder deactivation, ECM/PCM failure: A malfunction in the engine control module or powertrain control module can cause communication issues with the deactivation control circuit.
- 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 P3459 Chrysler Description
The P3459 Chrysler diagnostic trouble code (DTC) specifically refers to an issue with the Cylinder 8 Deactivation Control Circuit being detected as low. In Chrysler vehicles equipped with cylinder deactivation technology, the engine is designed to deactivate certain cylinders under light load conditions to improve fuel efficiency. Cylinder deactivation helps reduce fuel consumption by essentially turning off specific cylinders when they are not needed, such as during cruising or low-demand driving situations. This process is controlled by the engine control module (ECM) or powertrain control module (PCM) through the deactivation solenoids.
Common Causes of P3459 Chrysler
- Faulty deactivation solenoid: A malfunctioning deactivation solenoid can prevent cylinder 8 from deactivating as intended.
- Wiring issues: Damaged or corroded wiring connections can disrupt the control circuit and prevent proper cylinder deactivation.
- ECM/PCM failure: A malfunction in the engine control module or powertrain control module can cause communication issues with the deactivation control circuit.
- Poor electrical connections: Loose or poor electrical connections at the solenoid or ECM/PCM can lead to low circuit voltage readings.
Symptoms of P3459 Chrysler
- Poor fuel economy: Since cylinder deactivation plays a crucial role in improving fuel efficiency, a fault in the control circuit can lead to decreased gas mileage.
- Rough idling or engine misfires: The engine may run rough or experience misfires due to improper cylinder deactivation.
- Check Engine Light: The illumination of the Check Engine Light is a common symptom associated with this code.
- Reduced power: The vehicle may experience a loss of power or acceleration due to cylinder deactivation not functioning properly.
How to Fix P3459 Chrysler
- Diagnose the issue: Use a scan tool to retrieve the trouble code and perform a thorough inspection of the deactivation control circuit, solenoid, wiring, and connectors.
- Replace faulty components: Replace the faulty deactivation solenoid, repair damaged wiring connections, or replace the ECM/PCM if necessary.
- Clear the trouble code: After repairing the issue, clear the DTC from the ECM/PCM memory to reset the Check Engine Light.
- Test drive: Take the vehicle for a test drive to ensure that the cylinder deactivation system is functioning properly and that the symptoms have been resolved.
Cost to Fix P3459 Chrysler
The typical repair costs for addressing the Cylinder 8 Deactivation Control Circuit Low code can vary depending on the specific cause of the issue. Replacement of the deactivation solenoid or repair of wiring connections may cost between $200 to $500, including parts and labor. If the ECM/PCM needs to be replaced, the cost can range from $500 to $1000 or more. Additionally, diagnostic time and labor rates at auto repair shops can vary, with hourly rates typically ranging between $80 and $150. It is recommended to consult with a certified mechanic or dealership to obtain an accurate cost estimate based on the vehicle make and model.
Tech Notes for P3459 Chrysler
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