P0171 on Chevrolet Cruze
System Too Lean Bank 1
Methodology: Reviewed against the SAE J2012 generic DTC definition and NHTSA owner-complaint patterns, then scoped to Chevrolet Cruze context without treating complaints as confirmed diagnoses.
Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).
- SAE J2012 Diagnostic Trouble Code Definitions — Generic diagnostic trouble code definition reference for P0171.
- NHTSA recalls, complaints, and manufacturer communications — Used to check public owner complaint context, recall status, and safety-related manufacturer communications by VIN or vehicle.
Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.
What P0171 Means on Your Chevrolet Cruze
P0171 is a diagnostic trouble code indicating: System Too Lean Bank 1. This code relates to the fuel and air metering system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.
Real Chevrolet Cruze Owner Reports
Source: NHTSA Complaints Database
"Mil p0171 code, replaced 3 valve covers because of the pcv and now i've been informed the intake manifold is defective."
"Stability trac and traction control light appears, vehicle experiences immediate loss of power. experienced while driving on freeway attempting to change lanes. due to the sudden loss of power i was nearly struck by a big rig."
"Everything that has to do with the air in cabin and air intake for engine fails. Have issues all the time with it , told I need to fix one part then that fails again. Can’t use the AC in this car more than half the time if not an issue arises."
"Even after free repair due to being covered under warranty, the new pcv valve and cover are leaking again. engine idles roughly, both in park and in drive. this is a known issue with chevrolet cruze, but my vin is not part of the recall."
"Mil came on while driving, vehicle set p0171 p0106 codes, idles rough. valve cover cracked at pcv housing and pcv valve stuck open resulting in air leak."
All reports filed by vehicle owners directly with the U.S. Department of Transportation.
📊 Complaint Trend by Model Year
Common Causes on Chevrolet Cruze
Based on NHTSA complaint component analysis for this vehicle.
What To Do Next
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1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
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2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50–$150) pinpoints the root cause before you spend money on parts.
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3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.