P2627

O2 Sensor Pumping Current Trim Circuit Low Bank 1 Sensor 1

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine Light Is On
Increased fuel consumption
Unstable engine idling
Reduced engine power
Possible misfires

Causes

Faulty oxygen sensor Bank 1 Sensor 1
Open or short circuit in the wiring to the sensor
Poor contact in sensor connectors
Corroded contacts or damaged wire insulation
Malfunction of the engine control unit (rare)

How to Fix

Check the integrity of the sensor wiring and connectors
Measure the resistance and voltage in the sensor circuit
Clean connector contacts from corrosion
Replace a faulty oxygen sensor
If necessary, check and replace damaged wires

Related codes

P2626 P2628 P2630