P2234

O2 Sensor Signal Circuit Shorted to Heater Circuit 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
Increased fuel consumption
Unstable engine operation
Reduced engine power
Dips during acceleration

Causes

Damage to the oxygen sensor wiring harness
Short circuit in heating circuit
Oxygen sensor malfunction
Connector pin corrosion
Damage to wire insulation

How to Fix

Visual inspection of sensor wiring and connectors
Checking the resistance of the heating circuit
Checking the voltage in the signal circuit
Replacing the oxygen sensor if necessary
Repair or replacement of damaged wires

Related codes

P2235 P2236 P2237