What Does P2241 Mean?
The PCM detected abnormally low current in the positive control circuit for Bank 2 Sensor 1 oxygen sensor heater. This indicates insufficient current flow through the heater element, preventing proper sensor operation.
Common Causes
35%
High resistance in O2 sensor heater circuit wiring or connections
30%
Partially failed oxygen sensor with degraded heater element
20%
Poor ground connection for O2 sensor heater circuit
10%
Weak voltage supply from O2 heater relay or fuse
5%
PCM driver circuit providing insufficient current
Diagnostic Steps
1
Step 1: Check all connections at Bank 2 Sensor 1 O2 sensor for corrosion and proper seating
2
Step 2: Measure voltage drop across positive and ground circuits while heater is active (should be minimal)
3
Step 3: Test O2 sensor heater element resistance (should be within manufacturer specification, typically 3-10 ohms)
4
Step 4: Check ground circuit continuity and resistance to chassis ground (should be less than 1 ohm)
5
Step 5: Monitor actual heater current with amp clamp and compare to specifications
Estimated Repair Cost
$150 - $450
Parts + labor, varies by vehicle and location
The PCM detected abnormally low current in the positive control circuit for Bank 2 Sensor 1 oxygen sensor heater. This indicates insufficient current flow through the heater element, preventing proper sensor operation.
The most common cause of P2241 (O2 Sensor Positive Current Control Circuit Low Bank 2 Sensor 1) is: High resistance in O2 sensor heater circuit wiring or connections
Typical repair costs for P2241 range from $150 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive temporarily but may cause extended warm-up time, poor fuel economy, and increased emissions. Prolonged operation can damage catalytic converter.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2241 to identify the root cause.
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Quick Info
Category
Powertrain
System
Emissions Control
Difficulty
Type
Generic (SAE)
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