✅ Fixed
Cleaned MAF sensor with dedicated MAF cleaner spray. Also found small cracked vacuum hose near intake manifold. Replaced hose $8. P0171 cleared and has not returned.
Hyundai Santa Fe 2021 Check engine light P0171 lean mixture
Safe to Drive?
⚠️ Drive with Caution
Urgency Level
🟠 Fix Soon
Hyundai Santa Fe 2021 check engine light on with P0171 lean bank 1 code. Rough idle and slightly worse fuel economy noticed. 107625 km. This fault code is stored when the engine control unit detects a specific fault condition. Common causes include sensor failures, wiring faults, and component wear. Always read additional fault codes before replacing parts — multiple codes together provide a clearer diagnosis. Clear the code after repair and test drive to confirm the fault does not return.
🔍 Symptoms
📍 Hyundai Santa Fe
⚠️ P0171 fault code
⚙️ Possible Causes
Fault code P0171 detected
Hyundai Santa Fe
Possible: Cleaned MAF sensor with dedicated MAF cleaner spray. Also found small cracked vacuum hose near intake manifold. Replaced hose $8. P0171 cleared and has not returned.
Onarım / Çözüm
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