P0112 Mercedes-Benz Code - Intake Air Temperature Circuit Low Input
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 Mercedes-Benz 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 Mercedes-Benz Description
What are the Possible Causes of the DTC P0112 Mercedes-Benz?
- 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 Mercedes-Benz?
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 Mercedes-Benz 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 Mercedes-Benz Code
1. What are the common symptoms of OBDII code P0112 in a Mercedes-Benz?
- Common symptoms include stalling, rough idle, poor fuel economy, and a noticeable decrease in engine performance.
2. What does the OBDII code P0112 for Intake Air Temperature Circuit Low Input mean in a Mercedes-Benz?
- This code indicates that the Engine Control Module (ECM) has detected a lower-than-expected voltage from the intake air temperature sensor.
3. What are the possible causes of OBDII code P0112 in a Mercedes-Benz?
- Potential causes include a faulty intake air temperature sensor, damaged wiring or connectors, a disconnected sensor, or issues with the ECM.
4. How can I diagnose the issue causing OBDII code P0112 in my Mercedes-Benz?
- You can use a multimeter to test the intake air temperature sensor for proper voltage output, inspect the wiring and connectors for damage, and check for any loose connections.
5. Can a dirty air filter trigger OBDII code P0112 in a Mercedes-Benz?
- Yes, a clogged or dirty air filter can disrupt the intake air temperature readings, potentially leading to a P0112 fault code.
6. Is it safe to continue driving my Mercedes-Benz with OBDII code P0112 present?
- It is not recommended to drive your vehicle with this code as it can lead to further engine damage and decreased performance.
7. How can I reset the OBDII code P0112 in my Mercedes-Benz after making repairs?
- You can reset the code using an OBDII scanner or by disconnecting the car's battery for a few minutes.
8. Are there any DIY repair tips for fixing OBDII code P0112 in a Mercedes-Benz?
- DIY repair tips include checking and cleaning the intake air temperature sensor, inspecting and repairing damaged wiring, and ensuring all connections are secure.
9. Will OBDII code P0112 cause my Mercedes-Benz to fail an emissions test?
- Yes, this code can cause your vehicle to fail an emissions test due to increased emissions and poor engine performance.
10. How much can I expect to pay to repair OBDII code P0112 in a Mercedes-Benz at a mechanic or dealership?
- Repair costs can vary depending on the exact cause of the issue, but you can expect to pay anywhere from $100 to $300 for parts and labor.
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