P0459 RAM Code - Evaporative Emission Purge Solenoid Control Circuit High Voltage
Quick Answer
The Evaporative Emission System (EVAP) canister purge volume control solenoid valve uses an ON/OFF duty to control the flow rate of fuel vapor from the EVAP canister. Common causes include Faulty Evaporative Emission (EVAP) Purge Solenoid Control, Evaporative Emission Purge Solenoid Control harness is open or shorted, Evaporative Emission Purge Solenoid Control circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
- What it means
- P0459 RAM indicates Evaporative Emission Purge Solenoid Control Circuit High Voltage.
- Common causes
- Common causes include Faulty Evaporative Emission (EVAP) Purge Solenoid Control, Evaporative Emission Purge Solenoid Control harness is open or shorted, Evaporative Emission Purge Solenoid Control circuit poor electrical connection.
- Severity
- Low - monitor the vehicle and repair when practical.
- Can I drive?
- The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
Code P0459 RAM Description
What are the Possible Causes of the DTC P0459 RAM?
- Faulty Evaporative Emission (EVAP) Purge Solenoid Control
- Evaporative Emission Purge Solenoid Control harness is open or shorted
- Evaporative Emission Purge Solenoid Control circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0459 RAM?
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 P0459 RAM 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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Frequently Asked Questions about P0459 RAM Code
1. What does the OBDII code P0459 mean on my RAM vehicle?
P0459 indicates a high voltage issue in the Evaporative Emission (EVAP) Purge Solenoid Control Circuit, which is part of the system that prevents fuel vapors from escaping into the atmosphere.
2. What are the common symptoms of the P0459 code?
Symptoms may include an illuminated check engine light, a fuel odor, reduced fuel efficiency, and in some cases, difficulty starting the engine.
3. What causes the P0459 code to appear?
Common causes include a faulty EVAP purge solenoid, damaged wiring or connectors in the purge solenoid circuit, or a malfunctioning powertrain control module (PCM).
4. Can I continue driving my RAM with a P0459 code?
While the vehicle may still be drivable, ignoring the code can lead to increased emissions and potential damage to other components, so it’s best to address it promptly.
5. How can I diagnose the P0459 code?
Start by visually inspecting the EVAP purge solenoid, connectors, and wiring for damage or corrosion. Use a multimeter to check for proper voltage and continuity in the circuit and test the solenoid for functionality.
6. How do I fix the P0459 code on my RAM?
Repairs may involve replacing the EVAP purge solenoid, repairing or replacing damaged wiring or connectors, or reprogramming the PCM if necessary.
7. What tools are needed to fix a P0459 code?
You may need a scan tool to clear and diagnose the code, a multimeter to test the circuit, and basic hand tools to replace the purge solenoid or repair wiring.
8. How much does it cost to fix a P0459 code?
The cost varies depending on the issue, but replacing an EVAP purge solenoid typically costs $50–$150 for parts, plus labor if done by a mechanic.
9. Can a loose gas cap cause the P0459 code?
While a loose gas cap is a common cause of EVAP-related codes, it is unlikely to cause the specific high voltage issue associated with P0459.
10. Will clearing the code with a scan tool fix the problem?
Clearing the code may turn off the check engine light temporarily, but the underlying issue must be repaired to prevent the code from returning.
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