P0070
Fix when convenientAmbient Air Temperature Sensor Circuit Malfunction
Code P0070 means your car's outside air temperature sensor circuit has a problem. Common causes: faulty sensor (70%), wiring issues (20%). Drivability: Yes, safe to drive. Repair cost: $20-$100 DIY, $75-$200 professional.
Can I Drive With P0070?
Yes, safe to drive
No restrictions
Stop driving immediately if: No critical symptoms associated with this code that require stopping.
Symptoms of P0070
- 1Incorrect outside temperature display on dashboard
- 2Automatic climate control system not working correctly
- 3Air conditioning system not cooling or heating properly
- 4Check Engine Light is on
Common Causes of P0070
Parts most likely causing this code, ranked by probability
The sensor itself has failed and is sending incorrect or no data to the engine computer.
70% of P0070 cases are fixed by replacing this part
Damaged, corroded, or open wiring in the AAT sensor circuit prevents the signal from reaching the computer.
20% of P0070 cases are fixed by repairing this part
A corroded, loose, or damaged electrical connector at the AAT sensor or PCM causes an intermittent or complete loss of signal.
8% of P0070 cases are fixed by repairing this part
The engine computer has an internal fault, which is a rare occurrence.
2% of P0070 cases are fixed by replacing this part
Check These First (Before Buying Parts)
- Visually inspect the Ambient Air Temperature sensor and its wiring for any obvious damage, cuts, or corrosion. The sensor is usually located in the front bumper, grille, or sometimes in the side mirror.
- Ensure the sensor's electrical connector is securely plugged in and free of dirt or moisture.
How to Diagnose P0070
- 1Visually inspect the Ambient Air Temperature sensor and its wiring harness for any obvious damage, corrosion, or loose connections. The sensor is usually located behind the front bumper or grille.
- 2Disconnect the AAT sensor and check the electrical connector for corrosion or bent pins.
- 3Use a multimeter to test the resistance of the AAT sensor. Compare readings to factory specifications (resistance changes with temperature).
- 4Check for proper voltage supply and ground at the AAT sensor connector using a multimeter.
- 5If the sensor and wiring check out, a professional diagnostic scan tool can monitor the AAT sensor's live data to confirm its readings.
P0070 on Popular Vehicles
Toyota Camry
2007-2024The AAT sensor is commonly located behind the front bumper cover, often clipped into the grille or a bracket. Corrosion in the connector is a frequent cause.
75% fixed by Ambient Air Temperature (AAT) Sensor
Honda Accord
2003-2024The AAT sensor is typically in the front bumper area. Wiring damage from minor front-end bumps or road debris is a common culprit.
70% fixed by Ambient Air Temperature (AAT) Sensor
Ford F-150
2004-2024On F-150s, the AAT sensor is often integrated into the grille or behind the bumper. Exposure to elements can lead to sensor failure or wiring corrosion.
65% fixed by Ambient Air Temperature (AAT) Sensor
Frequently Asked Questions
What does P0070 mean?
P0070 indicates a malfunction in the Ambient Air Temperature (AAT) sensor circuit, meaning your vehicle's computer is not receiving a correct signal from the sensor that measures the outside air temperature.
Can I drive with P0070?
Yes, safe to drive. This code does not affect engine performance or safety systems. You might experience incorrect outside temperature readings or issues with your automatic climate control.
Will P0070 clear itself?
No, P0070 will not clear itself. The Check Engine Light will remain on until the underlying issue with the Ambient Air Temperature sensor circuit is diagnosed and repaired.
How do I fix P0070 myself?
Start by visually inspecting the AAT sensor and its wiring for damage. If no damage is found, replace the Ambient Air Temperature sensor. This is often a simple plug-and-play replacement.
How much does it cost to fix P0070?
A DIY fix for P0070 typically costs $20-$100 for a new Ambient Air Temperature sensor. Professional repair at a shop will cost $75-$200, including parts and labor.
P0070 keeps coming back - why?
If P0070 returns after replacing the sensor, the issue is likely in the wiring harness or the electrical connector leading to the sensor. Inspect these components thoroughly for corrosion, breaks, or loose pins.
Will P0070 fail emissions/smog test?
Yes, P0070 will cause your vehicle to fail an emissions or smog test. Any active Check Engine Light indicates a fault in the system and prevents passing the inspection.
What's the difference between P0070 and P0073?
P0070 indicates a general malfunction in the Ambient Air Temperature sensor circuit. P0073 specifically means the circuit voltage is too high, suggesting an open circuit or a short to voltage, causing the sensor to report an extremely low temperature.
P0070 on Honda Accord?
On many Honda Accord models, the Ambient Air Temperature sensor is located behind the front bumper, often near the passenger side fog light or lower grille. Corrosion in the connector is a common cause for P0070 on these vehicles.
Questions to Ask Your Mechanic
Did you check the wiring harness for the ambient air temperature sensor for any damage or corrosion?
Good answer: Yes, I visually inspected the wiring and checked for continuity. The live data showed the sensor stuck at -40 degrees F, indicating an open circuit.
What were the live data readings from the ambient air temperature sensor when you scanned the vehicle?
Good answer: The live data showed the sensor stuck at a constant value, like -40°F or 185°F, which indicates a circuit malfunction or a failed sensor.
Repair Cost Estimate
DIY Repair
Parts only
$20-$100
Shop Repair
Parts + labor
$75-$200
Save $55-$100 by doing it yourself
Difficulty
beginner
Time
0.5-1 hour
Beginner-friendly - replacing the AAT sensor is often a simple plug-and-play job requiring minimal tools and no specialized knowledge.
Cost of Waiting
Ignoring P0070 will not cause engine damage. The primary consequences are an inaccurate outside temperature display and potentially malfunctioning automatic climate control, leading to discomfort.
While You're In There...
Cleaning the electrical connector pins can resolve intermittent connection issues and prevent future corrosion, especially if the sensor is exposed to the elements.
Tools You'll Need
- Basic hand tools (screwdriver, pliers)
- Multimeter (for diagnosis)
- Wire strippers/crimpers (if wiring repair needed)
P0070 is a straightforward code that indicates a problem with a non-critical sensor. The repair is typically inexpensive and easy to do yourself, restoring your climate control and temperature display.
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Your Next Steps
Step 1: Check the Ambient Air Temperature sensor's location (usually front bumper/grille) and visually inspect the sensor and its wiring for any damage or corrosion.
Step 2: If the visual inspection doesn't reveal an obvious issue, disconnect the sensor and check the connector for bent pins or corrosion. If the sensor looks good, replace the Ambient Air Temperature sensor.
Step 3: Parts you'll likely need: A new Ambient Air Temperature sensor.