P2235 Fault Code

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

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2235 fault code indicates a malfunction in the oxygen sensor signal circuit. Specifically, it refers to an issue where the signal circuit of the O2 sensor is shorted to the heater circuit. This problem is associated with Bank 2 Sensor 2, typically found in vehicles with a V-type engine configuration.

What are the symptoms of the P2235 code?

Symptoms that may accompany the P2235 fault code are:

• Illuminated check engine light on the dashboard.
• Reduced engine performance or power.
• Increased fuel consumption due to incorrect fuel-mixture readings.
• Failed emissions tests due to improper sensor readings.

What causes the P2235 code?

The common causes of the P2235 code include:

• Damaged wiring or connectors in the O2 sensor circuit.
• A faulty oxygen sensor that is shorted internally.
• Damaged ECM (Engine Control Module) affecting the sensor's operation.
• Poor vehicle maintenance leading to excessive carbon build-up.

How to fix P2235?

To resolve the P2235 fault code, you should:

• Inspect the wiring and connectors for any visible damage or corrosion and repair or replace as needed.
• Test the oxygen sensor with a multimeter to determine if it is functioning correctly; replace it if it is defective.
• Check for short circuits in the O2 sensor circuit and resolve any shorts found.
• Clear the fault codes and perform a test drive to verify if the issue has been resolved.