Fuel Trim System Stuck Rich (Bank 1)
The P2180 code means the vehicle's onboard diagnostic system has detected: Fuel Trim System Stuck Rich (Bank 1). This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- moderate
- Estimated cost
- $100 - $600 (parts and labor)
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Common Symptoms
- Check Engine Light on
- Engine runs rich on Bank 1
- Black smoke from exhaust
- Strong fuel smell
- Reduced fuel economy
Probable Causes (Ranked by Likelihood)
- Leaking fuel injector on Bank 1 Very High
- Faulty front oxygen sensor on Bank 1 reading lean High
- Fuel pressure regulator leaking Moderate
- EVAP system purge valve stuck open Low
Step-by-Step Diagnostic Procedure
-
Monitor Bank 1 fuel trims and O2 sensor data
-
Check fuel injectors for leaks using a balance test
-
Test fuel pressure regulator for internal leaks
-
Inspect EVAP purge valve operation
Frequently Asked Questions
What does P2180 mean?
P2180 indicates: Fuel Trim System Stuck Rich (Bank 1). The ECM has identified an abnormal condition that needs attention.
Can I drive with P2180?
Drive short distances only and schedule repair.
What is the most common fix?
The most common fix depends on the root cause. Start with basic checks like vacuum leaks, sensor conditions, and fluid levels before replacing components.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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