AutoCodes – Mercedes-Benz – P220E Mercedes-Benz

P220E Mercedes-Benz Code - NOx Sensor Heater Control Circuit Range/Performance Bank 1 Sensor 1

Quick Answer

This fault code is stored when a malfunction is detected with the NOx sensor circuit. Common causes include Faulty NOx Sensor, NOx Sensor harness is open or shorted, NOx Sensor 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: P220E Mercedes-Benz indicates NOx Sensor Heater Control Circuit Range/Performance Bank 1 Sensor 1.
Common causes: Common causes include Faulty NOx Sensor, NOx Sensor harness is open or shorted, NOx Sensor 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 10,215

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 Jul 09, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P220E Mercedes-Benz Description

This fault code is stored when a malfunction is detected with the NOx sensor circuit. Some lean burn and direct injection vehicles will use a Selective Catalytic Reduction system (SCR), which uses a NOx accumulator to store oxides of Nitrogen and allows them to be reduced at a suitable time. A NOx sensor is used to detect when a regeneration is required and when the regeneration is complete. The NOx sensor will have a module located close to the sensor which communicates with the engine control module. A heater circuit is required to get the NOx sensor up to operating temperature quickly to allow for reliable performance in a timely manner.

OBDII Code P220E Mercedes-Benz - NOx Sensor Heater Control Circuit Range/Performance Bank 1 Sensor 1 - AutoCodes.com — P220E Mercedes-Benz Code - NOx Sensor Heater Control Circuit Range/Performance Bank 1 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P220E Mercedes-Benz?

Faulty NOx Sensor
NOx Sensor harness is open or shorted
NOx Sensor circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P220E 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 P220E 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.

Need more information about the P220E Mercedes-Benz code?

Need more information on how to fix the P220E Mercedes-Benz code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 P220E Mercedes-Benz Code

1. What are common symptoms of OBDII code P220E in a Mercedes-Benz?

- Common symptoms include poor engine performance, decreased fuel efficiency, and the illumination of the check engine light.

2. What causes the OBDII code P220E in a Mercedes-Benz?

- The code P220E is typically triggered by a malfunction in the NOx sensor heater control circuit for Bank 1 Sensor 1, often due to a faulty sensor or wiring issue.

3. How can I diagnose the OBDII code P220E in my Mercedes-Benz?

- Diagnosis involves using an OBDII scanner to retrieve the code, inspecting the NOx sensor and its connections for any visible damage, and testing the sensor's resistance.

4. Can I continue driving my Mercedes-Benz with the OBDII code P220E present?

- While the vehicle may still be drivable, it is not recommended to ignore the code as it can lead to decreased engine performance and potential long-term damage if left unresolved.

5. How can I repair the OBDII code P220E in my Mercedes-Benz?

- Repair options include replacing the faulty NOx sensor, repairing any damaged wiring or connections, and clearing the code with an OBDII scanner.

6. Are there any preventive measures to avoid the OBDII code P220E in a Mercedes-Benz?

- Regular maintenance, such as inspecting and cleaning the NOx sensor, checking the sensor connections, and addressing any issues promptly, can help prevent the code from appearing.

7. Can a DIY enthusiast fix the OBDII code P220E in a Mercedes-Benz?

- While some basic troubleshooting and repairs can be done by DIY enthusiasts, it is recommended to have a professional technician diagnose and repair complex issues related to the NOx sensor heater control circuit.

8. How long does it take to repair the OBDII code P220E in a Mercedes-Benz?

- The repair time can vary depending on the exact cause of the code and the extent of the repair needed. It can range from a quick sensor replacement to a more involved wiring repair.

9. Will resetting the check engine light clear the OBDII code P220E in a Mercedes-Benz?

- Resetting the check engine light may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear once the system detects the problem again.

10. Should I take my Mercedes-Benz to a dealership for the OBDII code P220E repair?

- While a dealership can provide specialized knowledge and OEM parts, independent auto repair shops with experience in Mercedes-Benz vehicles can often offer competitive pricing and quality service for resolving the code P220E.