P2277 - OBD II Trouble Code

Our automotive experts have put together the following information about the P2277 diagnostic trouble code. We've provided the common symptoms that occur when this code is set along with the frequent repairs that address the issues related to the P2277 code.

OBD II Fault Code

• OBD II P2277

OBD-II Code Decreased engine performance is defined as a O2 Sensor Signal Biased/Stuck Rich

The oxygen sensor measures the amount of oxygen in the exhaust between the engine and the catalytic converter. This sensor is supposed to fluctuate a minimum of 10 times per second within a specified voltage. If the engine's control module (PCM) does not see the correct fluctuations, the PCM will set code P2277.

Decreased engine performance Symptoms

• Decreased engine performance
• Increased fuel consumption

Common Problems That Trigger the P2277 Code

• Clogged air filter
• Oxygen sensor failure
• Powertrain Control Module (PCM) failure
• Wiring issue

Common Repairs Needed for the P2277 Code

• Oxygen Sensor Replacement