What Does P2254 Mean?
The PCM has detected an open circuit or malfunction in the oxygen sensor negative current control circuit for Bank 2 Sensor 1 (pre-catalytic converter). This affects the ability to properly control the wideband/air-fuel ratio oxygen sensor's pumping current.
Common Causes
35%
Faulty oxygen sensor internal circuitry or heater element failure
30%
Damaged or corroded wiring harness and connector between PCM and oxygen sensor
20%
Poor ground connection in oxygen sensor circuit
10%
PCM internal driver circuit failure
5%
Water intrusion or corrosion in sensor connector
Diagnostic Steps
1
Step 1: Visually inspect Bank 2 Sensor 1 oxygen sensor connector and wiring for damage, corrosion, or looseness
2
Step 2: Check voltage supply and ground circuits at O2 sensor connector with DVOM
3
Step 3: Measure resistance of oxygen sensor heater element (typically 2-14 ohms when cold)
4
Step 4: Monitor oxygen sensor negative current control circuit with scan tool data PIDs while engine running
5
Step 5: If all circuits test normal, replace oxygen sensor and retest
Estimated Repair Cost
$200 - $500
Parts + labor, varies by vehicle and location
The PCM has detected an open circuit or malfunction in the oxygen sensor negative current control circuit for Bank 2 Sensor 1 (pre-catalytic converter). This affects the ability to properly control the wideband/air-fuel ratio oxygen sensor's pumping current.
The most common cause of P2254 (O2 Sensor Negative Current Control Circuit/Open Bank 2 Sensor 1) is: Faulty oxygen sensor internal circuitry or heater element failure
Typical repair costs for P2254 range from $200 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive short distances but may experience reduced fuel economy and increased emissions. Continued operation may 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 P2254 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel System / Emissions Control
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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