What Does P2192 Mean?
The PCM has detected an overly rich air/fuel mixture on Bank 1 cylinders when the engine is under higher load conditions. This indicates too much fuel or insufficient air during acceleration or sustained power demands.
Common Causes
30%
Excessive fuel pressure from faulty fuel pressure regulator or blocked return line
25%
Leaking fuel injectors on Bank 1 over-delivering fuel under load
20%
Contaminated or failing MAF sensor over-reporting airflow under load
15%
Faulty oxygen sensors on Bank 1 providing incorrect rich signal
10%
Restricted air intake or clogged air filter limiting airflow under load
Diagnostic Steps
1
Step 1: Monitor fuel pressure during acceleration and high load to check for excessive pressure (above specs)
2
Step 2: Review fuel trim data on Bank 1 under load conditions (expect large negative STFT values)
3
Step 3: Perform cylinder contribution test to identify if specific injectors are over-fueling
4
Step 4: Inspect air filter and intake system for restrictions that could limit airflow
5
Step 5: Test MAF sensor output at various engine loads and compare to known-good specifications
Estimated Repair Cost
$150 - $900
Parts + labor, varies by vehicle and location
The PCM has detected an overly rich air/fuel mixture on Bank 1 cylinders when the engine is under higher load conditions. This indicates too much fuel or insufficient air during acceleration or sustained power demands.
The most common cause of P2192 (System Too Rich at Higher Load Bank 1) is: Excessive fuel pressure from faulty fuel pressure regulator or blocked return line
Typical repair costs for P2192 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 poor fuel economy, carbon buildup, and potential catalytic converter damage. May produce black smoke from exhaust under acceleration.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2192 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel System and Emissions
Difficulty
Type
Generic (SAE)
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