P0112 2002 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 2002 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 2002 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 2002 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 2002 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 2002 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 2002 Nissan Altima Sedan Code
1. What are the common symptoms of OBDII code P0112 in a 2002 Nissan Altima Sedan?
The common symptoms of code P0112 in a 2002 Nissan Altima Sedan include rough idling, decreased fuel efficiency, and potential engine stalling.
2. What does the OBDII code P0112 on a 2002 Nissan Altima Sedan mean?
Code P0112 indicates that the Intake Air Temperature (IAT) sensor is sending a low input signal to the Engine Control Module (ECM).
3. What are the possible causes of OBDII code P0112 in a 2002 Nissan Altima Sedan?
Possible causes of code P0112 in a 2002 Nissan Altima Sedan include a faulty IAT sensor, damaged wiring or connectors in the IAT circuit, or issues with the ECM.
4. How can I diagnose the cause of OBDII code P0112 in my 2002 Nissan Altima Sedan?
To diagnose code P0112, you can start by checking the IAT sensor's electrical connections, inspecting the sensor for damage, and using a multimeter to test the sensor's resistance.
5. Can a dirty air filter trigger OBDII code P0112 in a 2002 Nissan Altima Sedan?
Yes, a dirty air filter can affect the IAT sensor readings and potentially trigger code P0112 due to inaccurate temperature readings.
6. How can I reset OBDII code P0112 in my 2002 Nissan Altima Sedan?
Resetting code P0112 involves using an OBDII scanner to clear the code from the ECM's memory after addressing and fixing the underlying issue with the IAT sensor.
7. Is it safe to continue driving with OBDII code P0112 present in a 2002 Nissan Altima Sedan?
While the vehicle may still be operable with code P0112, it is recommended to address the issue promptly to prevent further engine performance problems and potential damage.
8. Can I replace the IAT sensor myself to fix OBDII code P0112 in a 2002 Nissan Altima Sedan?
Yes, replacing the IAT sensor is a relatively straightforward DIY repair that can help resolve code P0112 in a 2002 Nissan Altima Sedan.
9. Are there any aftermarket IAT sensor options available for a 2002 Nissan Altima Sedan to address code P0112?
Yes, there are aftermarket IAT sensor options available for a 2002 Nissan Altima Sedan that can be a cost-effective solution for fixing code P0112.
10. How can proper maintenance help prevent OBDII code P0112 in a 2002 Nissan Altima Sedan?
Regularly inspecting and replacing the air filter, checking the IAT sensor connections, and ensuring the intake system is clean can help prevent issues that lead to code P0112 in a 2002 Nissan Altima Sedan.
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