What Does P2180 Mean?
The PCM has detected an excessively rich fuel mixture on bank 2 during off-idle operating conditions. The long-term and short-term fuel trims have reached their maximum correction limits trying to compensate.
Common Causes
30%
Leaking fuel injector(s) on bank 2
25%
Failed or contaminated oxygen sensor(s) bank 2
20%
Excessive fuel pressure from failed regulator
15%
Restricted air intake or dirty MAF sensor
10%
Engine mechanical issues causing oil consumption
Diagnostic Steps
1
Step 1: Monitor live fuel trim data at idle and various RPMs to confirm rich condition and identify when it occurs
2
Step 2: Check fuel pressure with gauge - compare to specifications (typical 40-60 psi depending on system)
3
Step 3: Inspect oxygen sensor data for proper switching and response time using scan tool graphing
4
Step 4: Perform fuel injector balance test or cylinder contribution test to identify leaking injectors
5
Step 5: Check MAF sensor readings against known good values and inspect air filter for restrictions
Estimated Repair Cost
$200 - $1,200
Parts + labor, varies by vehicle and location
The PCM has detected an excessively rich fuel mixture on bank 2 during off-idle operating conditions. The long-term and short-term fuel trims have reached their maximum correction limits trying to compensate.
The most common cause of P2180 (System Too Rich Off Idle Bank 2) is: Leaking fuel injector(s) on bank 2
Typical repair costs for P2180 range from $200 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Rich conditions cause poor fuel economy, rough running, and catalyst damage over time. Vehicle is generally safe to drive short distances but requires prompt repair.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2180 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel System
Difficulty
Type
Generic (SAE)
Recommended Tools
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