What Does P2194 Mean?
The PCM has detected an overly rich air/fuel mixture on Bank 2 cylinders during higher engine load conditions. This indicates excessive fuel delivery or insufficient air intake when the engine is under increased power demand.
Common Causes
30%
Excessive fuel pressure from stuck or failed fuel pressure regulator
25%
Leaking or stuck-open fuel injectors on Bank 2 cylinders
20%
Faulty MAF sensor over-reporting airflow causing excessive fuel delivery
15%
Contaminated or failing oxygen sensors on Bank 2 reading false rich condition
10%
Restricted air intake system limiting airflow under load
Diagnostic Steps
1
Step 1: Measure fuel pressure under load and verify it doesn't exceed manufacturer specifications
2
Step 2: Review Bank 2 fuel trim data under high load conditions (expect large negative values)
3
Step 3: Perform injector balance test on Bank 2 cylinders to identify leaking injectors
4
Step 4: Check air filter condition and inspect intake system for restrictions or collapsed ducts
5
Step 5: Monitor MAF sensor output under various load conditions and verify accuracy
Estimated Repair Cost
$150 - $900
Parts + labor, varies by vehicle and location
The PCM has detected an overly rich air/fuel mixture on Bank 2 cylinders during higher engine load conditions. This indicates excessive fuel delivery or insufficient air intake when the engine is under increased power demand.
The most common cause of P2194 (System Too Rich at Higher Load Bank 2) is: Excessive fuel pressure from stuck or failed fuel pressure regulator
Typical repair costs for P2194 range from $150 to $900, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive but will experience significantly reduced fuel economy and may damage catalytic converter. Black exhaust smoke may be visible under acceleration.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2194 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel System and Emissions
Difficulty
Type
Generic (SAE)
Recommended Tools
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