AutoCodes – Generic – P112C

P112C Code - Oxygen Sensor Negative Current or Positive Current Control Circuit/Open Bank 1 Sensor 1

Quick Answer

The Engine Control Module (ECM) monitors the Oxygen (O2) Sensor Bank 1 Sensor 1. Common causes include Faulty Oxygen (O2) Sensor Bank 1 Sensor 1, O2 Sensor Bank 1 Sensor 1 harness is open or shorted, O2 Sensor Bank 1 Sensor 1 circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P112C indicates Oxygen Sensor Negative Current or Positive Current Control Circuit/Open Bank 1 Sensor 1.
Common causes: Common causes include Faulty Oxygen (O2) Sensor Bank 1 Sensor 1, O2 Sensor Bank 1 Sensor 1 harness is open or shorted, O2 Sensor Bank 1 Sensor 1 circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 11,012

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 25, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P112C Description

The Engine Control Module (ECM) monitors the Oxygen (O2) Sensor Bank 1 Sensor 1. The ECM sets the OBDII code when the Oxygen (O2) Sensor Bank 1 Sensor 1 is not to factory specifications.

OBDII Code P112C - Oxygen Sensor Negative Current or Positive Current Control Circuit/Open Bank 1 Sensor 1 - AutoCodes.com — P112C Code - Oxygen Sensor Negative Current or Positive Current Control Circuit/Open Bank 1 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P112C?

Faulty Oxygen (O2) Sensor Bank 1 Sensor 1
O2 Sensor Bank 1 Sensor 1 harness is open or shorted
O2 Sensor Bank 1 Sensor 1 circuit poor electrical connection

How to Fix the DTC P112C?

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P112C code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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Information for Specific Makes

P112C BMW — Upstream Oxygen Sensor Open Circuit Monitoring Virtual Ground Failure or Pumping Current Failure Bank 1
P112C Buick — Intake Air Temperature Sensor 3 Circuit Low Voltage
P112C Cadillac — Intake Air Temperature Sensor 3 Circuit Low Voltage
P112C Chevrolet — Intake Air Temperature Sensor 3 Circuit Low Voltage
P112C GMC — Intake Air Temperature Sensor 3 Circuit Low Voltage
P112C MINI — Upstream Oxygen Sensor Open Circuit Monitoring Virtual Ground Failure or Pumping Current Failure Bank 1

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.