B0159

Outside Temperature Sensor Range/Performance

Moderate severity

The HVAC control module reports an out-of-range or implausible reading from the outside air temperature sensor. The displayed value may be stuck or impossibly high/low.

Common causes

Outside temperature sensor failed
One of the most commonly reported causes for this code — check this first.
high
Typical part cost: $30-170
Wiring or connector fault
A plausible cause — test and verify before replacing parts.
medium
Typical part cost: $30-170
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First things to check

1Confirm the code with a scan tool and check for additional related codes.
2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.

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Related codes

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Frequently asked questions

What does B0159 mean?

B0159 means "Outside Temperature Sensor Range/Performance". It is a generic OBD-II code that points to a fault in the body.

What are the most common causes of B0159?

outside temperature sensor failed; wiring or connector fault; sensor element aged beyond calibration window — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.

Can I keep driving with this code?

The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.

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