P2194 Fault Code

System Too Rich at Higher Load Bank 2

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

The P2194 fault code indicates that the Engine Control Module (ECM) has detected a condition where the air-fuel mixture is too rich at higher loads specifically on bank 2 of the engine. This condition can lead to increased fuel consumption, higher emissions, and potential engine damage if not addressed promptly.

What are the symptoms of the P2194 code?

• Poor fuel economy due to excessive fuel being consumed.
• Increased exhaust emissions that can lead to failing emissions tests.
• Rough idling or engine stalling under certain conditions.
• Check Engine Light (CEL) illuminated in the dashboard.

What causes the P2194 code?

• Malfunctioning fuel injectors delivering excess fuel.
• Faulty oxygen sensors not accurately measuring exhaust gases.
• Vacuum leaks leading to an improper air-fuel ratio.
• Issues with the mass airflow sensor (MAF) providing incorrect data to the ECM.
• Problems with the engine control module itself.

How to fix P2194?

• Inspect and replace any faulty fuel injectors.
• Test and, if necessary, replace oxygen sensors to ensure accurate readings.
• Check for and repair any vacuum leaks in the intake system.
• Clean or replace the mass airflow sensor to ensure proper air measurement.
• If all else fails, consider reprogramming or replacing the ECM after professional diagnosis.