Engine-Codes - Hyundai - P1166 2002 HYUNDAI SANTA FE

P1166 2002 HYUNDAI SANTA FE - O2 Sensor System Lambda Controller at the Limit Bank 1

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3  What is this?
Table of contents

P1166 2002 HYUNDAI SANTA FE Possible Causes

  • Air leakage or restriction in intake or exhaust system
  • Dirty engine oil or oil level too high
  • Front HO2S or MAFS contamination
  • Fuel system
  • EVAP system
  • Faulty sensor signals

How is the P1166 2002 HYUNDAI SANTA FE code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

What is the cost to diagnose the P1166 2002 HYUNDAI SANTA FE code

Labor: 1.0

The cost to diagnose the P1166 2002 HYUNDAI SANTA FE code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
How much do you know about cars?

Take the AutoCodes.com automotive tests and turbo-charge your car repair knowledge

Play Now

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1166 2002 HYUNDAI SANTA FE Meaning

The Lambda closed-loop control system is included in the engine's control system. The control system regulates the lambda upstream with the HO2S signal. Rich mixtures generate high concentrations of CO, H2, and HC. Lean mixtures generate the high concentrations of NOx, and free oxygen.

If the lambda controller reaches the maximum or minimum threshold, then feedback control is no longer possible and emissions will be increased. The ECM sets DTC P1166 if no proportional fuel adaptation occurs for a defined time after the lambda controller has reached its minimum or maximum threshold.

More Information

Need more information on how to fix the P1166 2002 HYUNDAI SANTA FE code?
Get Access to Factory Service Manuals

Need more help?

Get the P1166 2002 Hyundai Santa Fe code diagnosed by a professional: Find a repair shop in your area