OBD Guide

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

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

Related codes

Error P2236 by Vehicle Brand