What Does P2252 Mean?
The negative current control circuit for Bank 1 Sensor 1 oxygen sensor is reading lower than expected. This indicates a short to ground or excessive current draw in the wideband sensor's pumping cell control circuit.
Common Causes
35%
Negative current control wire shorted to ground
35%
Failed wideband oxygen sensor with internal short to ground
15%
Damaged wiring harness near exhaust or heat shields
10%
Corroded connector causing intermittent short to ground
5%
ECM internal short in negative current driver circuit
Diagnostic Steps
1
Step 1: Disconnect Bank 1 Sensor 1 wideband O2 sensor and check for short to ground on negative current control wire using ohmmeter
2
Step 2: Measure resistance between negative current control circuit and ground with sensor disconnected (should be high resistance/open)
3
Step 3: Inspect wiring harness routing and condition, particularly near exhaust components where heat damage is common
4
Step 4: If wiring tests good, measure internal resistance of O2 sensor negative current circuit per manufacturer specifications
5
Step 5: Replace O2 sensor if internal resistance is out of specification or wiring shows no faults
Estimated Repair Cost
$180 - $600
Parts + labor, varies by vehicle and location
The negative current control circuit for Bank 1 Sensor 1 oxygen sensor is reading lower than expected. This indicates a short to ground or excessive current draw in the wideband sensor's pumping cell control circuit.
The most common cause of P2252 (O2 Sensor Negative Current Control Circuit Low Bank 1 Sensor 1) is: Negative current control wire shorted to ground
Typical repair costs for P2252 range from $180 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive but will experience reduced fuel economy and performance. Extended operation may damage catalytic converter due to improper air-fuel mixture control.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2252 to identify the root cause.
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Quick Info
Category
Powertrain
System
Emissions Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
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