P2059 OBD-II Trouble Code: Reductant Injection Air Pump Control Circuit/Open

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

SCHEDULE P2059 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P2059 code

P2059 is a diagnostic trouble code (DTC) for "Reductant Injection Air Pump Control Circuit/Open". 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 for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 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$70.00$30.00
Toyota$70.00$30.00
BMW$70.00$30.00
SCHEDULE P2059 DIAGNOSTIC Get a fair and transparent estimate upfront

Check Engine Light

P2059 code definition

Reductant Injection Air Pump Control Circuit/Open

What the P2059 code means

P2059 is an OBD-II generic code indicating that the Engine Control Module (ECM) detects that the reductant injection air pump control circuit has an open in the circuit.

What causes the P2059 code?

  • The ECM controls the reductant injection air pump. The ECM can detect open circuits or high resistance in the control circuit and will turn on the Check Engine Light if it detects a fault.

  • A broken wire in the control circuit from the ECM to the reductant injector air pump.

What are the symptoms of the P2059 code?

  • The Check Engine Light will be illuminated and the code set in ECM memory as a fault.

  • The exhaust emission may be richer than expected.

  • The vehicle will fail any emission tests due to the Check Engine Light being on.

How does a mechanic diagnose the P2059 code?

  • Scans and documents the codes in the ECM; looks at the corresponding freeze frame data for failure

  • Checks the air pump wiring connections for problems with loose or corroded connections

  • Checks the air pump for the proper resistance

  • Follows the manufacturer pinpoint tests for the diagnosis and replacement of the reductant injector and air pump

Common mistakes when diagnosing the P2059 code?

  • Clearing ECM memory codes before checking the freeze frame data for the main failure problem, so the failure may be duplicated and repaired.

  • Failing to clear the ECM codes after the codes are fixed so the ECM will enable the system to normal again.

How serious is the P2059 code?

Code P2059 is a code that may not cause any drive complaints but will put on the Check Engine Light and cause a vehicle to fail an emission test.

What repairs can fix the P2059 code?

Additional comments for consideration regarding the P2059 code

Code P2059 is for an open circuit for the reductant injector air pump. This is a code only used by a couple of different manufacturers; meanings may be different from your vehicle than this article implies. Follow the pinpoint test for the vehicle you are working on to determine if your vehicle uses the reductant injection system. In some vehicles, this code is used for O2 sensor problems.

Need help with a P2059 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
Check Engine Light
P2059

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

SCHEDULE P2059 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

4.5/5

Number of Reviews

3,815

Rating Summary
3,485
164
43
24
99
3,485
164
43
24
99

Joe

40 years of experience
576 reviews
Joe
40 years of experience
Joe was extremely knowledgeable and friendly. He went above and beyond to resolve my issue. I would definitely use him again for any future repair issues.
2008 SATURN AURA - CHECK ENGINE LIGHT IS ON - CLEARWATER, FLORIDA

Oscar

21 years of experience
66 reviews
Oscar
21 years of experience
Really good experience. Very knowledgeable and tried to explain everything that was needed and everything that was done and why.
2008 DODGE CHARGER - CHECK ENGINE LIGHT IS ON INSPECTION - SILVER SPRING, MARYLAND

Peter

33 years of experience
346 reviews
Peter
33 years of experience
Peter went above and beyond to help me with my issue. I would recommend this mechanic to anyone.
2008 CHEVROLET EQUINOX - CHECK ENGINE LIGHT IS ON - SAN DIEGO, CALIFORNIA

Brett

7 years of experience
167 reviews
Brett
7 years of experience
Brett was very knowledgeable and professional.
2009 LAND ROVER RANGE ROVER SPORT - CHECK ENGINE LIGHT IS ON - KYLE, TEXAS

More related articles

Insurance Requirements for Car Registration in Kentucky
The Kentucky Transportation Cabinet requires that all drivers in Kentucky carry liability automotive insurance, or “financial responsibility” in order to operate a vehicle legally and maintain vehicle...
How to Transfer a Car Title in Idaho
In order to prove ownership of a car, you must have the title. However, when a car is sold, given away or inherited, the title needs...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...

Related questions

Q: The Check Engine Light comes back on after I reset it

When the Check Engine Light comes on without any specific warning, this can indicate a variety of possible issues. Unfortunately, without more specific symptoms, this can be tough to diagnose without the use of a scanning tool and the skill...

Q: DTC Help Request

You might have a problem with fretting corrosion in the connectors of the modules of the vehicle. There is a technical bulletin out for your Saturn VUE: 09-06-03-004D, dated December 2010 for corrosion in the small connector pins of the...

Q: Multiple trouble codes, no spark, no start.

You are getting codes to each and every major sensor on the engine that is needed to run your motor. You either have a major malfunction with the ECU or a problem with the harness not being wired correctly. You...

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