AutoCodes – RAM – P229F RAM

P229F RAM Code - NOx Sensor Circuit Range/Performance Bank 2

Quick Answer

The reductant system uses two Nitrogen Oxide (NOx) sensors to monitor the amount of NOx in the engine's exhaust gas. Common causes include Faulty Nitrogen Oxide (NOx) Sensor Bank 2, Nitrogen Oxide (NOx) Sensor Bank 2 harness is open or shorted, Nitrogen Oxide (NOx) Sensor Bank 2 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: P229F RAM indicates NOx Sensor Circuit Range/Performance Bank 2.
Common causes: Common causes include Faulty Nitrogen Oxide (NOx) Sensor Bank 2, Nitrogen Oxide (NOx) Sensor Bank 2 harness is open or shorted, Nitrogen Oxide (NOx) Sensor Bank 2 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 3,689

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 Dec 23, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P229F RAM Description

The reductant system uses two Nitrogen Oxide (NOx) sensors to monitor the amount of NOx in the engine's exhaust gas. The first sensor is located at the outlet of the turbocharger and monitors the engine out NOx level. The second NOx sensor is located between the Selective Catalytic Reduction (SCR) and the Diesel Particulate Filter (DPF) and monitors NOx levels downstream of the SCR. The second NOx sensor also provides the Engine Control Module (ECM) with information on the exhaust oxygen level during DPF regeneration.
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 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 (DEF) or reductant added by varying the reductant injector duty cycle in response to changes in engine exhaust out 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.

OBDII Code P229F RAM - NOx Sensor Circuit Range/Performance Bank 2 - AutoCodes.com — P229F RAM Code - NOx Sensor Circuit Range/Performance Bank 2

What does this mean?

What are the Possible Causes of the DTC P229F RAM?

Faulty Nitrogen Oxide (NOx) Sensor Bank 2
Nitrogen Oxide (NOx) Sensor Bank 2 harness is open or shorted
Nitrogen Oxide (NOx) Sensor Bank 2 circuit poor electrical connection

How to Fix the DTC P229F 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 P229F 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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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 P229F RAM Code

1. What are common symptoms of OBDII code P229F RAM (NOx Sensor Circuit Range/Performance Bank 2)?

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

2. What are the possible causes of OBDII code P229F RAM (NOx Sensor Circuit Range/Performance Bank 2)?

- Possible causes include a faulty NOx sensor, damaged wiring or connectors in the sensor circuit, or issues with the engine control module.

3. How can I diagnose OBDII code P229F RAM (NOx Sensor Circuit Range/Performance Bank 2)?

- Diagnosis typically involves using a diagnostic scanner to read the code, conducting a visual inspection of the sensor and its connections, and testing the sensor's functionality using appropriate tools.

4. Can driving with OBDII code P229F RAM (NOx Sensor Circuit Range/Performance Bank 2) cause further damage to the vehicle?

- Continuing to drive with this code may lead to increased emissions, potential damage to the catalytic converter, and ultimately affect the vehicle's overall performance.

5. How can I repair OBDII code P229F RAM (NOx Sensor Circuit Range/Performance Bank 2)?

- Repair options may include replacing the NOx sensor, repairing or replacing damaged wiring or connectors, or reprogramming the engine control module.

6. Are there any DIY tips for resolving OBDII code P229F RAM (NOx Sensor Circuit Range/Performance Bank 2)?

- While some basic checks like inspecting wiring connections can be done by DIY enthusiasts, it is recommended to seek professional help for accurate diagnosis and repair.

7. How much does it typically cost to fix OBDII code P229F RAM (NOx Sensor Circuit Range/Performance Bank 2)?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Can resetting the check engine light resolve OBDII code P229F RAM (NOx Sensor Circuit Range/Performance Bank 2)?

- Simply resetting the check engine light will not fix the underlying issue causing the code. It is crucial to diagnose and repair the problem to prevent it from reoccurring.

9. How long can I safely drive with OBDII code P229F RAM (NOx Sensor Circuit Range/Performance Bank 2) before getting it repaired?

- It is best to address the issue promptly to prevent any potential damage to the vehicle's emission system and to ensure optimal engine performance.

10. Does OBDII code P229F RAM (NOx Sensor Circuit Range/Performance Bank 2) affect vehicle safety?

- While this code primarily relates to emissions control, unresolved issues can impact overall engine performance and efficiency, which may indirectly affect vehicle safety.