What Does P2244 Mean?
The PCM detected abnormal performance in the reference voltage circuit for Bank 1 Sensor 1 oxygen sensor. The reference voltage is present but not within expected parameters for proper sensor operation.
Common Causes
35%
Intermittent connection or high resistance in O2 sensor wiring or connectors
30%
Degraded oxygen sensor with weak or erratic signal output
20%
Poor ground connection affecting reference voltage stability
10%
Electromagnetic interference affecting signal circuit
5%
PCM reference voltage circuit degradation or instability
Diagnostic Steps
1
Step 1: Check all connections at Bank 1 Sensor 1 for looseness, corrosion, or intermittent contact
2
Step 2: Monitor reference voltage with scan tool or multimeter while wiggling harness to identify intermittent issues
3
Step 3: Measure resistance of signal wire from sensor to PCM (should be very low, less than 5 ohms)
4
Step 4: Check for proper ground circuit integrity and voltage drop (should be minimal)
5
Step 5: Monitor O2 sensor voltage response during snap throttle test; replace sensor if response is sluggish
Estimated Repair Cost
$150 - $450
Parts + labor, varies by vehicle and location
The PCM detected abnormal performance in the reference voltage circuit for Bank 1 Sensor 1 oxygen sensor. The reference voltage is present but not within expected parameters for proper sensor operation.
The most common cause of P2244 (O2 Sensor Reference Voltage Performance Bank 1 Sensor 1) is: Intermittent connection or high resistance in O2 sensor wiring or connectors
Typical repair costs for P2244 range from $150 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive but may experience intermittent poor fuel economy, hesitation, and increased emissions. PCM may switch to open-loop operation periodically.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2244 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel System / Emissions Control
Difficulty
Type
Generic (SAE)
Recommended Tools
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