P0110
Fix within 1-2 weeksThe engine computer is not receiving a proper signal from the Intake Air Temperature (IAT) sensor.
Code P0110 means your engine computer isn't getting a proper signal from the Intake Air Temperature sensor. Common causes: Faulty IAT sensor (60%), wiring issues (25%), or a bad MAF sensor (10%). Drivability: Yes, safe to drive, but fix within 1-2 weeks. Repair cost: $15-$150 DIY, $100-$350 professional.
Can I Drive With P0110?
Yes, safe to drive
No restrictions, but expect reduced fuel economy and performance.
Stop driving immediately if: Flashing Check Engine Light, significant loss of power, loud engine noises, or a strong smell of fuel or rotten eggs.
Symptoms of P0110
- 1Check Engine Light is on
- 2Rough idle or stalling
- 3Poor fuel economy
- 4Reduced engine power or sluggish acceleration
- 5Hard starting, especially in extreme hot or cold weather
- 6Black smoke from the exhaust (indicating a rich fuel mixture)
Common Causes of P0110
Parts most likely causing this code, ranked by probability
The IAT sensor itself has failed internally, sending an incorrect or no signal to the engine computer.
60% of P0110 cases are fixed by replacing this part
Damaged, corroded, or loose wires and connectors leading to the IAT sensor prevent a proper signal transmission.
25% of P0110 cases are fixed by repairing wiring or connectors
On many vehicles, the IAT sensor is integrated into the MAF sensor, so a failing MAF sensor can trigger an IAT circuit code.
10% of P0110 cases are fixed by replacing the MAF sensor
A rare internal fault within the engine computer's IAT sensor circuit can cause this code.
5% of P0110 cases are fixed by replacing the ECM/PCM
Check These First (Before Buying Parts)
- Visually inspect the IAT sensor and its electrical connector for any obvious damage, corrosion, or loose connections.
- Check the air filter for cleanliness and ensure the air intake ducting is securely connected and free of cracks.
- Use an OBD-II scan tool to monitor the IAT sensor's live data. Compare the reading to ambient temperature when the engine is cold.
How to Diagnose P0110
- 1Visually inspect the IAT sensor and its electrical connector for any signs of damage, corrosion, or loose connections.
- 2Use an OBD-II scan tool to monitor the IAT sensor's live data. Compare the reading to the ambient air temperature when the engine is cold. If it's stuck at an extreme value (e.g., -40°F or 300°F), the sensor or circuit is faulty.
- 3Check the air filter for excessive dirt or obstructions, as this can sometimes indirectly affect air temperature readings.
- 4If the IAT sensor is a standalone unit, test its resistance with a multimeter and compare to manufacturer specifications. If integrated into the MAF sensor, focus on MAF sensor diagnostics.
- 5Check for proper voltage supply and ground at the IAT sensor connector using a multimeter.
P0110 on Popular Vehicles
Toyota Camry
2002-2024On many Camry models, the IAT sensor is part of the Mass Airflow (MAF) sensor assembly. Diagnosis should include checking the MAF sensor and its connector.
70% fixed by replacing MAF sensor or repairing wiring
Honda Accord
2003-2024Similar to Toyota, the IAT sensor is frequently integrated into the MAF sensor on Honda Accord vehicles. Check the MAF sensor and its electrical connections thoroughly.
70% fixed by replacing MAF sensor or repairing wiring
Ford F-150
2004-2024Ford F-150s can have either a standalone IAT sensor or one integrated into the MAF. Wiring issues, especially corrosion or damage from engine bay heat, are common for both types.
65% fixed by replacing IAT sensor or repairing wiring
Frequently Asked Questions
What does P0110 mean?
P0110 indicates that the engine's computer has detected a malfunction in the Intake Air Temperature (IAT) sensor circuit, meaning it's not receiving a valid signal from the sensor.
Can I drive with P0110?
Yes, you can drive safely with a P0110 code. The engine computer will use a default value for air temperature, but you will experience reduced fuel economy and possibly rough running. Fix this within 1-2 weeks to prevent further issues.
Will P0110 clear itself?
No, P0110 will not clear itself. The Check Engine Light will remain on until the underlying circuit malfunction is diagnosed and repaired. Once fixed, you may need to clear the code with a scan tool.
How do I fix P0110 myself?
Start by visually inspecting the IAT sensor and its wiring for damage. If the sensor looks good, use a scan tool to check live data. If the reading is incorrect, replace the IAT sensor (or the MAF sensor if it's integrated). If that doesn't work, you'll need to test the wiring with a multimeter.
How much does it cost to fix P0110?
DIY repair costs for P0110 typically range from $15-$150 for a new IAT sensor or MAF sensor. Professional repair at a shop will cost between $100-$350, including parts and labor.
P0110 keeps coming back - why?
If P0110 keeps returning, it indicates the initial repair didn't address the root cause. This often points to a persistent wiring issue, a faulty connector, or a rare problem with the engine computer itself, rather than just the sensor.
Will P0110 fail emissions/smog test?
Yes, a P0110 code will cause your vehicle to fail an emissions or smog test. The Check Engine Light being on is an automatic failure, and the incorrect IAT readings can lead to higher emissions.
What's the difference between P0110 and P0113?
P0110 indicates a general circuit malfunction for the IAT sensor, meaning the signal is unreliable or absent. P0113 specifically means the IAT sensor circuit has a 'High Input,' which usually points to an open circuit or a sensor reading extremely cold temperatures.
P0110 on Honda Civic?
On many Honda Civic models, the IAT sensor is integrated into the Mass Airflow (MAF) sensor. If you get a P0110 on a Civic, you should inspect the MAF sensor and its wiring, as replacing the entire MAF sensor assembly is often the fix.
Questions to Ask Your Mechanic
Did you check the IAT sensor's live data with a scan tool, and what were the readings compared to ambient temperature?
Good answer: Yes, I saw the IAT reading was stuck at -40°F (or 300°F) even when the engine was warm, indicating an open (or shorted) circuit.
What were the voltage and resistance readings at the IAT sensor connector and the sensor itself?
Good answer: I measured 5 volts reference and a good ground at the connector, but the sensor's resistance was out of spec (or infinite/zero), confirming an internal sensor failure.
Repair Cost Estimate
DIY Repair
Parts only
$15-$150
Shop Repair
Parts + labor
$100-$350
Save $85-$200 by doing it yourself
Difficulty
beginner
Time
0.5-1.5 hours
Beginner-friendly if the IAT sensor is a standalone, easily accessible part. Intermediate if it's integrated into the MAF sensor or requires electrical diagnosis with a multimeter.
Cost of Waiting
Ignoring P0110 will lead to consistently poor fuel economy and increased emissions. Over time, an engine running too rich can damage your catalytic converter, turning a simple $50 sensor replacement into a $1,200-$2,500 repair.
While You're In There...
If the air filter is dirty, it can restrict airflow and sometimes indirectly affect sensor readings or simply be due for replacement during intake system access.
If the IAT sensor is integrated into the MAF sensor, cleaning the MAF sensor can sometimes resolve issues and is good preventative maintenance.
While accessing the IAT or MAF sensor, inspect the surrounding intake hoses for cracks or leaks that could affect air measurement.
Tools You'll Need
- OBD-II scan tool
- Multimeter
- Basic hand tools (screwdriver, socket set)
- IAT sensor socket (if applicable)
P0110 is a common sensor code. Most repairs are straightforward and involve replacing an inexpensive sensor, restoring your engine's performance and fuel economy.
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Your Next Steps
Step 1: Visually inspect the IAT sensor and its wiring connector for any obvious damage, corrosion, or loose connections. Ensure the air filter is clean.
Step 2: Use an OBD-II scan tool to check the IAT sensor's live data. If the reading is stuck at an extreme value (-40°F or 300°F) or doesn't change, proceed to test the sensor or its circuit.
Step 3: If the IAT sensor is standalone, test its resistance with a multimeter. If it's integrated into the MAF sensor, consider testing or replacing the MAF sensor. You'll likely need a new IAT sensor or MAF sensor.