P0112 2003 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 2003 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 2003 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 2003 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 2003 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 2003 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 2003 Nissan Altima Sedan Code
1. What are the common symptoms of OBDII code P0112 on a 2003 Nissan Altima Sedan?
- The common symptoms include poor engine performance, rough idling, decreased fuel efficiency, and in some cases, the Check Engine Light may illuminate.
2. What does the OBDII code P0112 indicate on a 2003 Nissan Altima Sedan?
- OBDII code P0112 indicates that the Intake Air Temperature (IAT) sensor circuit is reporting a low input, which can affect the engine's performance.
3. What are the possible causes of OBDII code P0112 on a 2003 Nissan Altima Sedan?
- The possible causes include a faulty IAT sensor, damaged wiring or connectors in the IAT circuit, or issues with the engine control module (ECM).
4. How can I diagnose the OBDII code P0112 on my 2003 Nissan Altima Sedan?
- You can diagnose the code by visually inspecting the IAT sensor and its wiring, testing the sensor's resistance, and using a scan tool to monitor the sensor's readings.
5. Can a dirty air filter cause OBDII code P0112 on a 2003 Nissan Altima Sedan?
- While a dirty air filter can affect the engine's performance, it is not a direct cause of OBDII code P0112. Focus on checking the IAT sensor and related components.
6. Is it safe to continue driving with OBDII code P0112 on a 2003 Nissan Altima Sedan?
- It is not recommended to drive with this code as it can lead to poor engine performance and potential damage. It is best to address the issue promptly.
7. How can I repair OBDII code P0112 on my 2003 Nissan Altima Sedan?
- Repair options include replacing the faulty IAT sensor, repairing damaged wiring or connectors, or resetting the ECM after addressing the issue.
8. Can I fix OBDII code P0112 on a 2003 Nissan Altima Sedan myself?
- Depending on your automotive repair skills, you may be able to replace the IAT sensor or check the wiring yourself. However, for complex issues, it's best to consult a professional mechanic.
9. Will resetting the Check Engine Light resolve OBDII code P0112 on a 2003 Nissan Altima Sedan?
- Resetting the Check Engine Light may temporarily turn it off, but if the underlying issue causing P0112 is not fixed, the light will likely come back on.
10. How much does it cost to repair OBDII code P0112 on a 2003 Nissan Altima Sedan?
- The cost of repairing P0112 can vary depending on the specific issue. Replacing an IAT sensor can cost around $50-$150, while addressing wiring or ECM problems may be more expensive.
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