P2A07

O2 Sensor Negative Voltage Bank 1 Sensor 2

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Increased fuel consumption
Deterioration in acceleration dynamics
Check Engine Light Is On
Unstable engine idling
Dips during acceleration

Causes

Malfunction of the oxygen sensor (lambda probe)
Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Malfunction of the catalytic converter
Sensor circuit grounding problems

How to Fix

Check the continuity and resistance of the sensor circuit
Inspect the sensor connector and contacts for oxidation
Check the functionality of the oxygen sensor
If necessary, replace the oxygen sensor
Check the condition of the catalytic converter

Related codes

P2A00 P2A03 P2A04 P2A05