P2629

O2 Sensor Pumping Current Trim Circuit/Open Bank 2 Sensor 1

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine light comes on
Possible increase in fuel consumption
Unstable engine operation at idle
Reduced engine power
Increased level of harmful emissions

Causes

Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Malfunction of the oxygen sensor itself
Wiring harness damage
Problems with the engine control unit

How to Fix

Check the integrity of the sensor wiring and connectors
Measure the resistance and voltage in the sensor circuit
Check the functionality of the oxygen sensor
Replace sensor if necessary
Clear error codes and check if error is returned

Related codes

P2630 P2628 P0135