P2A00

O2 Sensor Circuit Range/Performance Bank 1 Sensor 1

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Check Engine light comes on
Increased fuel consumption
Reduced engine power
Unstable engine idling
Dips during acceleration

Causes

Faulty oxygen sensor
Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Leaks in the exhaust system
Fuel system problems (too rich or lean mixture)

How to Fix

Check the integrity of the wiring to the sensor
Check the sensor connector for corrosion or damage.
Check the exhaust system for leaks
Check the sensor readings using a scanner
If necessary, replace the oxygen sensor

Related codes

P0130 P0131 P0132 P0133