P0112 2004 Nissan Altima Sedan Code - Intake Air Temperature Circuit Low Input
Quick Answer
The Intake Air Temperature (IAT) sensor is variable temperature sensitive resistor that measures the temperature of the air in the intake system. 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 2004 Nissan Altima Sedan indicates Intake Air Temperature Circuit Low Input.
- 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.
Code P0112 2004 Nissan Altima Sedan Description
IAT sensor values are used by the ECM processor to assist with the calculation of idle speed, fuel mixture and spark advance.
Inaccurate voltages from the IAT sensor may affect pulse-width, idle quality, and tail pipe emissions. Intermittent signals may cause hesitation, stumble and surging. If an IAT sensor failure accompanies an Engine Coolant Temperature (ECT) sensor failure, cooling fan operation may also be affected.
The Intake Air Temperature (IAT) sensor is part of the Mass Air Flow (MAF) sensor (Air Flow Meter).
What are the Possible Causes of the DTC P0112 2004 Nissan Altima Sedan?
- 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 2004 Nissan Altima Sedan?
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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0112 2004 Nissan Altima Sedan 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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Frequently Asked Questions about P0112 2004 Nissan Altima Sedan Code
1. What are the common symptoms of OBDII code P0112 in a 2004 Nissan Altima Sedan?
The common symptoms include poor engine performance, rough idling, decreased fuel efficiency, and the illumination of the check engine light.
2. What does the OBDII code P0112 for a 2004 Nissan Altima Sedan indicate?
The code P0112 indicates an issue with the Intake Air Temperature (IAT) sensor circuit, specifically a low input signal.
3. What are the possible causes of the P0112 code in a 2004 Nissan Altima Sedan?
Possible causes include a faulty IAT sensor, damaged wiring or connectors in the IAT circuit, a disconnected or corroded sensor connector, or a problem with the engine control module (ECM).
4. How can I diagnose the P0112 code in my 2004 Nissan Altima Sedan?
You can diagnose the P0112 code by visually inspecting the IAT sensor and its wiring, testing the sensor for proper resistance values, and using a scan tool to monitor IAT sensor data.
5. Is it safe to drive my 2004 Nissan Altima Sedan with the P0112 code?
It is generally not recommended to drive the vehicle with the P0112 code active, as it can lead to poor engine performance and potential damage over time. It is best to address the issue promptly.
6. Can I repair the P0112 code in my 2004 Nissan Altima Sedan myself?
Depending on your mechanical skills, you may be able to repair the P0112 code yourself by replacing the faulty IAT sensor, repairing damaged wiring, or addressing connector issues. However, professional help may be needed for more complex issues.
7. How much does it typically cost to repair the P0112 code in a 2004 Nissan Altima Sedan?
The cost of repairing the P0112 code can vary depending on the underlying cause. Simple fixes like replacing the IAT sensor may cost around $50-$100, while more complex issues could cost several hundred dollars at a repair shop.
8. Will resetting the check engine light resolve the P0112 code in my 2004 Nissan Altima Sedan?
Resetting the check engine light may temporarily clear the code, but it will not fix the underlying issue causing the P0112 code. It is important to diagnose and address the root cause of the problem.
9. Can a malfunctioning IAT sensor cause other problems in a 2004 Nissan Altima Sedan?
Yes, a malfunctioning IAT sensor can cause issues such as incorrect air/fuel mixture, poor engine performance, and potential damage to engine components if left unresolved.
10. How often should the IAT sensor be inspected or replaced in a 2004 Nissan Altima Sedan?
The IAT sensor should be inspected during regular maintenance checks, and it should be replaced if any issues are detected or if it fails diagnostic tests related to the P0112 code.
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