P2047 OBD-II Trouble Code: Reductant Injector Circuit/Open Bank 1 Unit 1

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P2047 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P2047 code

P2047 is a diagnostic trouble code (DTC) for "Reductant Injector Circuit/Open Bank 1 Unit 1". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$20.00
Toyota$20.00
BMW$20.00
SCHEDULE P2047 DIAGNOSTIC Get a fair and transparent estimate upfront

P2047 trouble code definition

The P2047 code is a general OBD2 trouble code that points to a fault within the reductant injector circuit.

What the P2047 code means

The P2047 code means a fault is present in the reductant injection valve circuit, bank 1 unit 1. The reductant injector is used to reduce emissions gases exiting the exhaust by injecting either air or chemicals depending on the usage and vehicle. When the ECU detects the fault in the reductant injector circuit, it will set the P2047 code and the Check Engine Light will be displayed on the dashboard.

What causes the P2047 code?

  • Poor electrical connection
  • Open or short in the reductant injector circuit
  • EGT sensor failure
  • Exhaust leaks

What are the symptoms of the P2047 code?

The Check Engine Light is the most common symptom of the P2047 code. In rare cases, the driver may notice black smoke under heavy acceleration.

How does a mechanic diagnose the P2047 code?

Using this step by step diagnostic procedure technicians may successfully diagnose the P2047 code:

  • Hook up a scan tool to the DLC port and check for any codes present.

  • Note the codes and freeze frame data from all the codes.

  • Clear the stored codes from the ECU.

  • Perform a road test under similar conditions as the freeze frame data indicated.

  • Check that the P2047 is the code that has come back after the test drive.

  • A visual inspection will be done looking for signs of exhaust leaks or damaged wiring for either the sensor itself of the harness.

  • Using a multimeter, the OHMs will be checked to the exhaust gas temperature sensor.

  • The vehicle will be ran and the presence of exhaust leaks will be checked.

Common mistakes when diagnosing the P2047 code

Commonly an exhaust leaks is often overlooked as the cause of the P2047 code. When an exhaust leak is present it causes air to enter the exhaust and this changes the readings of the oxygen sensors and the exhaust gas temperature readings.

How serious is the P2047 code?

  • The P2047 code will generally not have any drivability concerns that would prevent the vehicle from being driven.

  • This code will cause the vehicle to fail emissions testing and may cause more exhaust emissions to exit the exhaust.

What repairs can fix the P2047 code?

  • Fixing poor electrical connection issues
  • Repairing or replacing the reductant injector wiring harness
  • Replacing the exhaust gas temperature sensor
  • Repairing of exhaust leaks

Additional comments for consideration regarding the P2047 code

Exhaust leaks can cause strange symptoms in modern cars. A easy way to find if the exhaust is leaking is to inspect the exhaust system while the vehicle is running. Caution should be taken when doing this as the exhaust can easily burn you.

Exhaust leaks can have a whistling sound or can be felt. In some cases the exhaust leak will leave a black sooty mark on the exhaust pipe right where the leak is making it very easy to find.

Need help with a P2047 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

trouble codes
P2047
Check Engine Light

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P2047 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.8/5

Number of Reviews

4,743

Rating Summary
4,361
185
47
28
122
4,361
185
47
28
122

Oreste

12 years of experience
108 reviews
Oreste
12 years of experience
Nissan Altima - Check Engine Light is on - Hialeah, Florida
Showed up quick, and went straight to inspecting a brake light on the dash issue. He found the issue, fixed it, and showed me exactly what was wrong. Thank you!

Daniel

9 years of experience
58 reviews
Daniel
9 years of experience
Honda Fit - Check Engine Light is on - Chicago, Illinois
Told me everything I needed to know and switch out after the inspection. So, I scheduled another service the next day for all the fixes, or fluid maintenance.

Patrick

31 years of experience
1032 reviews
Patrick
31 years of experience
Hyundai Santa Fe - Check Engine Light is on - Austin, Texas
Even after working on my car, he took the time to explain what he did, the parts, and any next steps. Very knowledgeable!

Joe

12 years of experience
22 reviews
Joe
12 years of experience
Toyota 4Runner - Check Engine Light is on - Sacramento, California
Joe was very thorough in his inspections, and his knowledge & experience was clear in his explanations of what was wrong with my car. I really appreciated his recommendations, and the fact that he worked so efficiently that it cut down on time... I would definitely book with him again.

More related articles

P2159 OBD-II Trouble Code: Vehicle Speed Sensor B Range/Performance
Diagnostic Trouble Code (DTC): P2159 P2159 code definition Vehicle Speed Sensor B Range/Performance Related Trouble Codes: P2158: Vehicle Speed Sensor B...
What are the Car Pool Rules in Hawaii?
Hawaii Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all states, freeways are an integral part of life...
P0608 OBD-II Trouble Code: Control Module VSS Output "A" Malfunction
P0608 means there is an malfunction in the vehicle speed sensor A control module often due too faulty speed sensor or shorted electrical wiring.

Related questions

Code P0340

The P0340 problem code references a camshaft position sensor malfunction. The ability to restart the engine suggests it is failing versus has failed. There was an issue with this engine with the cam chain tensioner - which also affects cam...

P2047 lost power when accelerating

I am working on this

Check Engine Light is flashing. My truck only starts after 5 seconds - 2006 Dodge Ram 1500

Hi and thanks for contacting YourMechanic. When the Check Engine Light flashes, it means that there is an intermittent problem making the light flash on and off. When the light flashes, it is best to pull off the road and...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com