📖 What Does P0174 Mean?
The engine is running with too much air and not enough fuel on bank 2. Similar to P0171 but affects the second bank of cylinders.
Symptoms
Rough idle, hesitation during acceleration, lack of power, backfiring, hard starting, check engine light.
Common Causes
Vacuum leaks on bank 2, faulty mass airflow sensor, clogged fuel injectors, weak fuel pump, intake manifold gasket leak.
Possible Solutions
Find and repair vacuum leaks on bank 2, clean or replace mass airflow sensor, clean fuel injectors, test fuel pump pressure.
Recommended Parts & Tools
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📦 Parts Needed
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Frequently Asked Questions about P0174
How serious is P0174?
This code has a medium severity level. This should be diagnosed and repaired soon to prevent further issues.
Can I drive with P0174?
You can typically drive short distances, but have it diagnosed as soon as possible.
How much does it cost to fix P0174?
Repair costs vary depending on the root cause, but typically range from $100-300 including parts and labor.
Related Diagnostic Codes
Other codes that may appear with P0174
System Too Lean Bank 1
Cylinder 1 Misfire Detected
Cylinder 2 Misfire Detected
Cylinder 3 Misfire Detected
Cylinder 4 Misfire Detected
Catalyst System Efficiency Below Threshold Bank 1
💡 Why These Codes Are Related:
- • Similar Issues: Same root cause or component failure
- • Related Problems: Often occur together due to system interactions
- • Sequential Codes: Progressive failure stages or multiple sensors
- • Same System: Components within the same automotive system