AutoCodes – Dodge – P2208 Dodge

P2208 Dodge Code - NOx Sensor Heater Sense Circuit Bank 1

Quick Answer

The Nitrogen Oxides (NOx) sensors are part of the selective catalytic reduction system, a device used to reduce NOx emission on diesel engines. Common causes include Faulty Nitrogen Oxides (NOx) Sensor, Nitrogen Oxides Sensor harness is open or shorted, Nitrogen Oxides 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: P2208 Dodge indicates NOx Sensor Heater Sense Circuit Bank 1.
Common causes: Common causes include Faulty Nitrogen Oxides (NOx) Sensor, Nitrogen Oxides Sensor harness is open or shorted, Nitrogen Oxides 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 5,304

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jul 24, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2208 Dodge Description

The Nitrogen Oxides (NOx) sensors are part of the selective catalytic reduction system, a device used to reduce NOx emission on diesel engines. There are two NOx sensors, one placed upstream of selective catalytic reduction, to measure inlet NOx concentration, and one placed downstream. They are connected with the control module via CAN and all the information is exchanged through it. Since it is a smart sensor, all the electrical monitoring is performed inside the sensor and only the results are sent to the Engine Control Module (ECM). Each NOx sensor contains a sensing cell, a pumping cell, and a heater. A sample of exhaust gas passes through a diffusion gap between the sensing cell and the pumping cell. The NOx sensor maintains a constant reference voltage across the sensing cell. An electronic circuit within the sensor controls the pump current through the pumping cell in order to maintain a constant voltage in the sensing cell. The amount of current required to maintain the reference voltage in the sensing cell is proportional to the concentration of NOx in the exhaust. The ECM varies the amount of diesel exhaust fluid (reductant) added by varying the reductant injector duty cycle in response to changes in engine exhaust NOx levels. The smart NOx sensors consist of two components, the NOx module and the NOx sensor element that are serviced as a unit. A circuit or performance condition with a NOx sensor is detected by the NOx sensor module. The smart NOx sensor module communicates the condition to the ECM over the serial data line. The ECM sets a DTC when a serial data message is received from the NOx sensor module. The Diagnostic Trouble Code (DTC) will be set if the ECM software detects a fault in the NOx sensor circuitry or a performance fault in the NOx sensor for greater than 2 s.

OBDII Code P2208 Dodge - NOx Sensor Heater Sense Circuit Bank 1 - AutoCodes.com — P2208 Dodge Code - NOx Sensor Heater Sense Circuit Bank 1

What does this mean?

What are the Possible Causes of the DTC P2208 Dodge?

Faulty Nitrogen Oxides (NOx) Sensor
Nitrogen Oxides Sensor harness is open or shorted
Nitrogen Oxides Sensor circuit poor electrical connection

How to Fix the DTC P2208 Dodge?

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 P2208 Dodge 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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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 P2208 Dodge Code

1. What does the OBDII code P2208 mean on a Dodge vehicle?

P2208 indicates an issue with the NOx sensor heater sense circuit on Bank 1. The sensor is responsible for monitoring nitrogen oxide levels in the exhaust, and the heater circuit helps it function properly.

2. What are the common symptoms of code P2208 on a Dodge?

Symptoms may include the check engine light turning on, reduced fuel efficiency, poor engine performance, or a failed emissions test.

3. What causes the P2208 code on a Dodge vehicle?

Common causes include a faulty NOx sensor, damaged wiring or connectors in the sensor circuit, a blown fuse, or an issue with the engine control module (ECM).

4. Is it safe to drive with the P2208 code active on my Dodge?

While the vehicle may still be drivable, it can lead to reduced performance, higher emissions, and potential damage to the catalytic converter if not addressed promptly.

5. How can I fix the P2208 code on my Dodge?

Repairs may include replacing the NOx sensor, repairing or replacing damaged wiring, checking and replacing fuses, or updating/reprogramming the ECM if necessary.

6. How do I diagnose the P2208 code on a Dodge vehicle?

Diagnosis typically involves using an OBDII scanner to confirm the code, visually inspecting the NOx sensor and wiring, testing the sensor heater circuit with a multimeter, and checking for blown fuses.

7. How much does it cost to repair a P2208 code on a Dodge?

The cost can vary depending on the cause, but replacing a NOx sensor typically costs between $200 and $500, while wiring repairs may be less expensive.

8. Can a dirty or clogged NOx sensor cause the P2208 code?

No, the P2208 code specifically relates to the heater sense circuit of the NOx sensor, not the sensor's ability to detect nitrogen oxides.

9. What is the function of the NOx sensor heater in a Dodge vehicle?

The heater helps the NOx sensor reach its optimal operating temperature quickly, which is essential for accurate readings of nitrogen oxide levels in the exhaust.

10. Can I clear the P2208 code without fixing the issue?

Clearing the code with an OBDII scanner may temporarily turn off the check engine light, but the issue will likely reoccur until the underlying problem is resolved.