Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. P2058 OBD-II Trouble Code: Reductant Injector Circuit High Bank 2 Unit 2

P2058 OBD-II Trouble Code: Reductant Injector Circuit High Bank 2 Unit 2

Check Engine Light

Diagnostic Trouble Code (DTC): P2058

P2058 code definition

Reductant Injector Circuit High Bank 2 Unit 2

What the P2058 code means

P2058 is an OBD-II generic code for the engine control module (ECM) detecting the reductant injection air pump control circuit for bank 2 unit 2 having an open or short in the circuit.

What causes the P2058 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 short to power in the control circuit from the ECM to the reductant injector air pump.

  • The high voltage battery supply is shorted to the control circuit return wire.

What are the symptoms of the P2058 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 illuminated Check Engine Light.

How does a mechanic diagnose the P2058 code?

  • Scans for codes and documents the codes in the ECM; looks at the 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 or shorts in the pump circuit.

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

Common mistakes when diagnosing the P2058 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 P2058 code?

Code P2058 is a code that may not cause any drive complaints but will illuminate the Check Engine Light and cause a vehicle to fail an emission test.

What repairs can fix the P2058 code?

  • Replacing the air pump

  • Repairing the connector pins of shorted harness, and repairing corrosion or loose connections at the reductant injector and air pump

  • Replacing an ECM as directed from manufacturer pinpoint tests.

Additional comments for consideration regarding the P2058 code

Code P2058 is for an open or shorted circuit for the reductant injector air pump. This is a code only used by a couple of different manufacturers, so 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.

Need help with a P2058 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.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

P0291OBD-II Trouble Code: Cylinder 11 Injector Circuit Low
P0291 code definition When your vehicle’s PCM registers the P0291 code, it means that a voltage reading came from the fuel injector circuit – for cylinder number 11’s fuel injector –...
P0359 OBD-II Trouble Code: Ignition Coil I Primary/Secondary Circuit Malfunction
P0359 code definition The P0359 code indicates that a fault has been detected in one of the vehicle’s ignition coils, generally the number 9 coil. This code can also be associated...
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

Q: What exactly does the code P3fff mean?

Hi there. The code P3fff means that there is an issue with the PCM (the computer to the vehicle). The codes regarding gas recirculation flow and mass air flow are coming on either due to the PCM failure or due...

Q: Check Engine light flashing.

The check engine light flashing is most likely from your engine miss firing on one or more cylinders. The computer should be scanned to see what cylinder is miss firing and that cylinder checked for a failing weak coil pack,...

Q: P0301 and P0411 codes on vw Passat 2003 1.8lt turbo

Fault code P0301 is a misfire on cylinder # 1 and P0411 is a fault for Incorrect Secondary Air Injection. Trouble code P0301 is most likely due to a faulty ignition coil. To verify before purchasing one, try swapping say...