P2190 Fault Code

System Too Rich at Idle Bank 2

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

The P2190 fault code indicates that there is an issue with the air-fuel mixture in the engine, specifically that the system is running too rich at idle for Bank 2. This means that there is an excessive amount of fuel in the air-fuel mixture, leading to inefficient combustion and potential damage to engine components if not addressed promptly.

What are the symptoms of the P2190 code?

Common symptoms associated with the P2190 fault code include:

• Rough idling or engine stalling
• Reduced fuel efficiency
• Decreased engine performance
• Engine misfires
• Unusual exhaust emissions, potentially visible black smoke
• Triggered check engine light.

What causes the P2190 code?

Several factors can contribute to the P2190 code, including:

• Faulty oxygen (O2) sensor readings on Bank 2
• Fuel injectors that are leaking or malfunctioning
• A malfunctioning mass air flow (MAF) sensor
• Problems with the fuel pressure regulator
• Vacuum leaks affecting the air-fuel mixture
• Issues with the engine control unit (ECU) or engine software.

How to fix P2190?

To resolve the P2190 code, the following steps may be necessary:

• Perform a thorough diagnosis to confirm the fault code and identify the underlying issue.
• Inspect and test the oxygen sensors to ensure they are functioning properly and replace if faulty.
• Check the fuel injectors for proper operation and replace any that are leaking or malfunctioning.
• Examine the mass air flow sensor and clean or replace it as needed.
• Inspect the fuel pressure regulator for proper pressure levels.
• Look for any vacuum leaks in hoses or intake components and repair as necessary.
• Update or reprogram the engine computer if the software is outdated.