OBD-II Generic Error Code P2244: How to Fix It

Q: What does P2244 mean on my car?

P2244 means the Powertrain Control Module (PCM) has detected that the reference voltage signal from the upstream heated oxygen sensor on Bank 1 (B1S1) is not performing within the expected range. This reference voltage is used by the PCM to interpret the sensor's output signal for fuel mixture control.

Q: Can I drive my car with a P2244 code?

You can usually drive short distances with a P2244 code, but it is not recommended for extended driving. An improperly functioning upstream oxygen sensor can cause the engine to run rich or lean, reducing fuel economy, increasing emissions, and potentially damaging the catalytic converter over time. Address the fault as soon as possible.

Q: What is the most common cause of a P2244 code?

The most common causes are a faulty B1S1 oxygen sensor, damaged or corroded wiring and connector at the sensor, or an exhaust leak near the sensor. Less commonly, the fault originates in the PCM's reference voltage circuit itself.

Q: How much does it cost to fix a P2244 code?

If the fix is simply replacing the upstream oxygen sensor, parts typically cost between $30 and $150 depending on the vehicle, with labor adding $50 to $150 at a shop. If the fault involves wiring repair it may cost slightly more. PCM repair or replacement is significantly more expensive, ranging from $300 to over $1,000 depending on the vehicle.

Q: Will P2244 cause my car to fail an emissions test?

Yes, in most cases a stored P2244 fault code will cause a vehicle to fail an OBD2-based emissions inspection because the check engine light will be illuminated. Even if the light is cleared before the test, the readiness monitors may not complete in time, which can also result in a failure. Fix the underlying cause before attempting an emissions test.

Abstract

Error code P2244 indicates a problem with the heated oxygen sensor (HO2S) reference voltage performance on Bank 1, Sensor 1 — the upstream oxygen sensor on the same side of the engine as cylinder number one. This means the PCM (Powertrain Control Module) has detected that the reference voltage signal from this sensor is outside the expected range, which can affect fuel trim and emissions control. Left unaddressed, this fault can cause poor fuel economy, rough running, and potential catalytic converter damage over time.