AutoCodes.com | All About OBDII Engine Codes
AutoCodes - Generic - P2038

P2038 Code - Reductant Injection Air Pressure Sensor 'A' Circuit Range/Performance

- Code Popularity: 14,604 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
Share on Facebook   Share on Twitter   Share on Linkedin

What are the Possible Causes of the DTC P2038?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Reductant Injection Air Pressure Sensor
  • Reductant Injection Air Pressure Sensor harness is open or shorted
  • Reductant Injection Air Pressure Sensor circuit poor electrical connection
  • Faulty Reductant Pump Assembly
⚠ Does your Car have Safety Recalls? → Check here

How to Fix the DTC P2038?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Search for P2038 Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2038 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P2038 Description

The reductant system uses a selective reduction catalyst to improve exhaust emissions and fuel efficiency by injecting a reductant into the exhaust system. The reductant also referred to as diesel exhaust fluid is a 32.5% solution of urea in deionized water. The reductant system reduces Nitrogen Oxides (NOx) present in the exhaust stream to nitrogen and water.
The Reductant Injection Air Pressure Sensor sends voltage reading information to the Powertrain Control Module (PCM). The PCM interprets these readings as pressure or exhaust gas temperature. The code is set when the voltage sent from the sensor to the PCM is out of factory specifications.

OBDII Code P2038 - Reductant Injection Air Pressure Sensor 'A' Circuit Range/Performance - AutoCodes.com
P2038 Code - Reductant Injection Air Pressure Sensor 'A' Circuit Range/Performance

Need More Information on the Code?

Need more information on how to fix the P2038 code? Get Access to Factory Service Manuals

Information for Specific Makes

  • P2038 Chevrolet Reductant Injection Air Pressure Sensor 'A' Circuit Range/Performance
  • P2038 Dodge Reductant Injection Air Pressure Sensor 'A' Circuit Range/Performance
  • P2038 Ford Reductant Injection Air Pressure Sensor 'A' Circuit Range/Performance
  • P2038 GMC Reductant Injection Air Pressure Sensor 'A' Circuit Range/Performance
  • P2038 Mercedes-Benz Reductant Injection Air Pressure Sensor 'A' Circuit Range/Performance

Need Help with the Code?

Get the P2038 code diagnosed by a professional: Find a repair shop in your area

Code P2038 comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the P2038 code? Have you replaced any parts?
Any information is appreciated. Thanks