P2236

O2 Sensor Signal Circuit Shorted to Heater Circuit Bank 2 Sensor 3

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 idling
Reduced engine power
Possible misfires

Causes

Damage to the oxygen sensor wiring harness
Short circuit in the sensor connector
Malfunction of the oxygen sensor itself
Damage to wire insulation near the exhaust system
Problems with the engine control unit

How to Fix

Visual inspection of the oxygen sensor wiring harness
Checking the integrity of wire insulation
Oxygen Sensor Resistance Testing
Check connectors for corrosion or damage
Replacing the oxygen sensor if necessary

Related codes

P2235 P2237 P2238