AutoCodes – Honda – P0112 1999 Honda Civic

P0112 1999 Honda Civic Code - Intake Air Temperature Circuit Low Voltage

Quick Answer

The Intake Air Temperature (IAT) sensor is built into mass air flow sensor or in some vehicles mounted to the air filter duct housing. Common causes include Faulty Intake Air Temperature (IAT) sensor, Dirty air filter, Intake Air Temperature (IAT) sensor harness is open or shorted. 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: P0112 1999 Honda Civic indicates Intake Air Temperature Circuit Low Voltage.
Common causes: Common causes include Faulty Intake Air Temperature (IAT) sensor, Dirty air filter, Intake Air Temperature (IAT) sensor harness is open or shorted.
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 5,795

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0112 1999 Honda Civic Description

The Intake Air Temperature (IAT) sensor is built into mass air flow sensor or in some vehicles mounted to the air filter duct housing. The sensor detects intake air temperature and transmits a signal to the Engine Control Module (ECM).The temperature sensing unit uses a thermistor which is sensitive to the change in temperature. Electrical resistance of the thermistor decreases in response to the temperature rise. The Intake Air Temperature signal is used as an input for various systems in the vehicle.

OBDII Code P0112 1999 Honda Civic - Intake Air Temperature Circuit Low Voltage - AutoCodes.com — P0112 1999 Honda Civic Code - Intake Air Temperature Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0112 1999 Honda Civic?

Faulty Intake Air Temperature (IAT) sensor
Dirty air filter
Intake Air Temperature (IAT) sensor harness is open or shorted
Intake Air Temperature (IAT) sensor circuit poor electrical connection

How to Fix the DTC P0112 1999 Honda Civic?

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 P0112 1999 Honda Civic 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 P0112 1999 Honda Civic code?

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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.

Frequently Asked Questions about P0112 1999 Honda Civic Code

1. What are the common symptoms of OBDII code P0112 on a 1999 Honda Civic?

- Common symptoms include poor engine performance, rough idling, decreased fuel efficiency, and potential stalling.

2. What causes the intake air temperature circuit to register low voltage in a 1999 Honda Civic?

- Possible causes include a faulty intake air temperature sensor, damaged wiring or connectors, or a problem with the Engine Control Module (ECM).

3. How can I diagnose the intake air temperature sensor on my 1999 Honda Civic to verify if it's causing the P0112 code?

- Use a multimeter to test the sensor's resistance, check for proper voltage supply, and inspect the sensor's wiring and connector for any signs of damage.

4. Can a dirty air filter trigger the P0112 code on a 1999 Honda Civic?

- Yes, a heavily clogged air filter can disrupt the intake air temperature readings and potentially lead to the P0112 code.

5. What are some DIY repair tips for addressing the P0112 code on a 1999 Honda Civic?

- Check and clean the intake air temperature sensor, inspect and repair any damaged wiring, and ensure the air filter is clean and properly installed.

6. Is it safe to continue driving a 1999 Honda Civic with the P0112 code triggered?

- It is not recommended to drive the vehicle with the P0112 code active, as it can lead to further engine problems and potential safety hazards.

7. Can resetting the OBDII system clear the P0112 code on a 1999 Honda Civic?

- Resetting the system may temporarily clear the code, but if the underlying issue is not fixed, the code is likely to reappear after driving the vehicle.

8. How much does it typically cost to repair the intake air temperature circuit low voltage issue on a 1999 Honda Civic?

- The cost of repairing the P0112 code can vary depending on the exact cause, but it may range from $100 to $300 for parts and labor.

9. Will the P0112 code prevent my 1999 Honda Civic from passing a state emissions test?

- Yes, the P0112 code can cause your vehicle to fail an emissions test, as it indicates a problem with the intake air temperature circuit.

10. Can a mechanic easily fix the P0112 code on a 1999 Honda Civic, or is it a complex repair?

- A qualified mechanic should be able to diagnose and repair the issue causing the P0112 code, as long as they have the necessary tools and expertise in automotive diagnostics.