AutoCodes – Generic – P112B

P112B Code - Engine Coolant Temperature Too Low

Quick Answer

The Engine Control Module (ECM) monitors the Engine Coolant Temperature Sensor signal. Common causes include Low engine coolant, Faulty Thermostat, Faulty Engine Coolant Temperature Sensor. 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: P112B indicates Engine Coolant Temperature Too Low.
Common causes: Common causes include Low engine coolant, Faulty Thermostat, Faulty Engine Coolant Temperature Sensor.
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 11,070

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 P112B Description

The Engine Control Module (ECM) monitors the Engine Coolant Temperature Sensor signal. The ECM sets the OBDII code when the Engine Coolant Temperature Sensor is out of factory specifications.

OBDII Code P112B - Engine Coolant Temperature Too Low - AutoCodes.com — P112B Code - Engine Coolant Temperature Too Low

What does this mean?

What are the Possible Causes of the DTC P112B?

Low engine coolant
Faulty Thermostat
Faulty Engine Coolant Temperature Sensor
Engine Coolant Temperature Sensor harness is open or shorted
Engine Coolant Temperature Sensor circuit poor electrical connection

How to Fix the DTC P112B?

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 P112B 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.

Need more information about the P112B code?

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Need Help with the Code?

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Information for Specific Makes

P112B BMW — Engine Coolant Temperature Too Low
P112B Buick — Intake Air Temperature Sensor 3 Performance
P112B Cadillac — Intake Air Temperature Sensor 3 Performance
P112B Chevrolet — Intake Air Temperature Sensor 3 Performance
P112B GMC — Intake Air Temperature Sensor 3 Performance
P112B MINI — Engine Coolant Temperature Too Low

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.