P0445 Mercedes-Benz Code - Evaporative Emission Control System Purge Control Valve Circuit Shorted
Quick Answer
The Evaporative Emission System (EVAP) Canister Purge Volume Control Solenoid Valve controls flow rate of fuel vapor from the EVAP canister. Common causes include Faulty Evaporative Emission (EVAP) Purge Solenoid Control, Evaporative Emission (EVAP) Purge Solenoid Control harness is open or shorted, Evaporative Emission (EVAP) 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
- P0445 Mercedes-Benz indicates Evaporative Emission Control System Purge Control Valve Circuit Shorted.
- Common causes
- Common causes include Faulty Evaporative Emission (EVAP) Purge Solenoid Control, Evaporative Emission (EVAP) Purge Solenoid Control harness is open or shorted, Evaporative Emission (EVAP) 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 P0445 Mercedes-Benz Description
The EVAP canister purge volume control solenoid valve uses a ON/OFF duty to control the flow rate of fuel vapor from the EVAP canister. The EVAP canister purge volume control solenoid valve is moved by ON/OFF pulses from the ECM. The longer the ON pulse, the greater the amount of fuel vapor that will flow through the valve.
What are the Possible Causes of the DTC P0445 Mercedes-Benz?
- Faulty Evaporative Emission (EVAP) Purge Solenoid Control
- Evaporative Emission (EVAP) Purge Solenoid Control harness is open or shorted
- Evaporative Emission (EVAP) Purge Solenoid Control circuit poor electrical connection
How to Fix the DTC P0445 Mercedes-Benz?
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 P0445 Mercedes-Benz 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 P0445 Mercedes-Benz Code
1. What does the OBDII code P0445 mean on a Mercedes-Benz?
P0445 indicates a problem in the evaporative emission control system, specifically a short circuit in the purge control valve circuit.
2. What are the symptoms of P0445 on a Mercedes-Benz?
Symptoms may include an illuminated check engine light, rough idle, decreased fuel efficiency, or a noticeable fuel smell.
3. What causes the P0445 code on a Mercedes-Benz?
Common causes include a faulty purge control valve, damaged wiring, a short circuit, or issues with the ECM.
4. Can I drive my Mercedes-Benz with the P0445 code?
While the car may still be drivable, it is not recommended as it could lead to increased emissions, poor performance, and potential damage to the EVAP system.
5. How do you diagnose the P0445 code on a Mercedes-Benz?
Diagnosis typically involves scanning for codes, inspecting the purge valve and wiring for damage, and testing the valve's electrical resistance.
6. How is the P0445 code fixed on a Mercedes-Benz?
Repairs may include replacing the purge control valve, repairing damaged wiring, or addressing ECM-related issues if necessary.
7. What is the cost to fix the P0445 code on a Mercedes-Benz?
Costs vary but typically range from $150 to $300, depending on whether the purge valve or wiring needs replacement.
8. Can a loose gas cap cause the P0445 code on a Mercedes-Benz?
No, a loose gas cap usually triggers a different EVAP-related code, such as P0457 or P0456.
9. Will clearing the P0445 code solve the problem permanently?
Clearing the code without addressing the underlying issue will not fix the problem, and the code is likely to return.
10. How can I prevent the P0445 code on my Mercedes-Benz?
Regular maintenance, including inspecting the EVAP system components and ensuring wiring is intact, can help prevent this code.
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