OBD-II Code Lookup

Your check engine light came on and a scanner gave you a code. Look it up here to see what it means, how serious it is, whether it's safe to keep driving, and what the common repairs should cost at a fair shop. Repair ranges are US market averages for parts and labor; your quote will vary by vehicle and region.

Common check engine codes

• P0300 — Random / Multiple Cylinder Misfire Detected (serious; typical fixes $100–$900)
• P0301 — Cylinder 1 Misfire Detected (serious; typical fixes $90–$600)
• P0420 — Catalyst System Efficiency Below Threshold (Bank 1) (moderate; typical fixes $100–$2,500)
• P0430 — Catalyst System Efficiency Below Threshold (Bank 2) (moderate; typical fixes $100–$1,200)
• P0171 — System Too Lean (Bank 1) (moderate; typical fixes $15–$900)
• P0174 — System Too Lean (Bank 2) (moderate; typical fixes $60–$900)
• P0442 — Evaporative Emission Control System Leak (Small) (low; typical fixes $0–$300)
• P0455 — Evaporative Emission Control System Leak (Large) (low; typical fixes $20–$300)
• P0128 — Coolant Temperature Below Thermostat Regulating Temperature (low; typical fixes $100–$450)
• P0401 — EGR Insufficient Flow Detected (moderate; typical fixes $100–$800)
• P0135 — O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1) (moderate; typical fixes $60–$450)
• P0700 — Transmission Control System Malfunction (serious; typical fixes $150–$1,200)
• P0011 — Intake Camshaft Position Timing Over-Advanced (Bank 1) (moderate; typical fixes $60–$3,000)
• P0014 — Exhaust Camshaft Position Timing Over-Advanced (Bank 1) (moderate; typical fixes $60–$2,000)
• P0102 — Mass Airflow Sensor Circuit Low Input (moderate; typical fixes $15–$400)
• P0113 — Intake Air Temperature Sensor Circuit High Input (low; typical fixes $50–$200)
• P0446 — Evaporative Emission Control System Vent Control Circuit (low; typical fixes $100–$600)
• P0121 — Throttle / Pedal Position Sensor Circuit Range/Performance (moderate; typical fixes $80–$900)
• P0141 — O2 Sensor Heater Circuit (Bank 1, Sensor 2) (low; typical fixes $60–$400)
• P0500 — Vehicle Speed Sensor 'A' Malfunction (moderate; typical fixes $80–$400)
• P0325 — Knock Sensor Circuit Malfunction (Bank 1) (moderate; typical fixes $100–$650)
• P0016 — Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A) (serious; typical fixes $60–$3,500)

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