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

Our certified mechanics come to you · Get a fair and transparent estimate upfront


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 $154.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $50.0 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 $154.99 $50.0
Toyota $154.99 $50.0
BMW $164.99 $50.0

*Estimates may vary by market

SCHEDULE P2059 DIAGNOSTIC Get a fair and transparent estimate upfront

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.

Check Engine Light
trouble codes
P2059

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P2059 code.

SCHEDULE P2059 DIAGNOSTIC
Get a $50 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(8600)

Rating Summary
8017
273
65
46
199
8017
273
65
46
199
 at YourMechanic

Brandon

9 years of experience
133 reviews
Brandon
9 years of experience
Ford Escort L4-2.0L - Check Engine Light is on - Nashville, Tennessee
Brandon showed up ahead of schedule, was very personable and diagnosed my problems. He also scheduled my next appointments which will be with him.
 at YourMechanic

William

23 years of experience
33 reviews
William
23 years of experience
Lexus IS250 V6-2.5L - Check Engine Light is on - Mableton, Georgia
Arrived early which was great. William was courteous, and attentive to the issue. Even though it took several attempts I'm so happy he was determined to fix it and he did!
 at YourMechanic

Dan

40 years of experience
1080 reviews
Dan
40 years of experience
Plymouth Grand Voyager - Check Engine Light is on - Lawrenceville, Georgia
Mr. Dan Barber was quite patient, courteous and quite knowledgeable. From my observation, Mr. Barber appears to be quite professional.
 at YourMechanic

Christopher

9 years of experience
120 reviews
Christopher
9 years of experience
Ford Fiesta L4-1.6L - Check Engine Light is on - Smyrna, Georgia
Chris communicated with us each step of the way up until his arrival. He listened well, was knowledgeable, and was prepared. He took the time to diagnose the problem, explained the what, why and how and provided a solution. I would definitely recommend him and will use him again.


More related articles

P0757 OBD-II Trouble Code: Shift Solenoid B Stuck On
P0757 code means the PCM has registered an irregularity within the shift solenoid B often due too hydraulic blockages internally or malfunctioning.
P0782 OBD-II Trouble Code: 2-3 Shift Malfunction
P0782 code means the PCM has detected a problem with the 2-3 shift function often due too faulty solenoids or transmission failure.
P0586 OBD-II Trouble Code: Cruise Control Vent Control Circuit/Open
P0586 means that there is an electrical fault in the cruise control vent control circuit due to faulty electrical components or cruise control switch.

Related questions

Where is temperature sensor
The engine coolant temperature sensor should be located on the radiator hose fitting on the front of the engine. The connector is locked in place by a clip lock on the connector housing that needs to be depressed at the...
Start issue
The maintenance reminder light generally refers to the need to change the engine oil and filter. That would not be relevant to the present no start. If the check engine light is on, or even if it is off, there...
My 2008 Mini Cooper S has a check engine light on and the code is P0977.
The code P0977 (https://www.yourmechanic.com/article/p0977-obd-ii-trouble-code-shift-solenoid-b-control-circuit-high-by-brady-klopfer) will set if the transmission control module (TCM) records an abnormal voltage reading from a shift solenoid in the transmission. A vehicle with the P0977 trouble code will generally be driveable but due to the potential...

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 (855) 347-2779 · hi@yourmechanic.com