Hyundai Tucson Iii C3023 Engine Trouble Code
What is Hyundai Tucson Iii C3023?
Hyundai Tucson Iii C3023 indicates potential catalytic converter failure. If completely failed, your vehicle may not run properly and fuel economy will suffer significantly. Average replacement cost is $2,000–$2,140. This repair requires professional service and should not be delayed.
C3023 on the Hyundai Tucson Iii
Service bulletins for the Hyundai Tucson Iii specifically mention C3023 as a symptom of failed purge solenoid valves in the EVAP system. The solenoid body on this platform degrades in high-humidity environments and should be inspected whenever this code appears.
Code Information
| Code Type: | OBD-II Chassis (C) Trouble Code |
| System: | Chassis |
| Vehicle: | Hyundai Tucson Iii |
| Brand: | Hyundai |
| Model: | Tucson Iii |
| Code: | C3023 |
C3023 Hyundai Tucson Iii Symptoms
Check Engine Light
Illuminated Hyundai Tucson Iii dashboard warning
Engine Stalling
Engine stops unexpectedly or misfires
Performance Issues
Reduced power or acceleration on the Hyundai Tucson Iii
Starting Problems
Difficulty starting the engine
Poor Fuel Economy
Increased fuel consumption on the Hyundai Tucson Iii
Increased Emissions
Failed emissions test due to C3023
C3023 Code Structure
Understanding what each digit means in the C3023 chassis trouble code:
| C | 3 | 0 | 2 | 3 |
|---|---|---|---|---|
| Chassis Code | Ignition System Or Misfire | Ambient Air Temperature Sensor Circuit Low | Turbocharger Boost Sensor A Circuit Low | Exhaust Gas Recirculation Sensor B Circuit High |
How to Fix Hyundai Tucson Iii C3023
Diagnostic Steps:
The catalytic converter has oxygen sensors before and after it. When warm and in closed-loop mode, the upstream O2 sensor reading should fluctuate, while downstream should remain steady.
Repair Solution:
Disconnected, dirty, or fouled spark plugs commonly prevent proper engine operation. Replace spark plugs every season or 25 hours. Verify proper spark plug gap. If plugs are good, check ignition components: spark plug wires, coils, and ignition module.
Technical Notes:
Parts or components should not be replaced based solely on C3023 DTC. Consult your vehicle service manual for proper diagnostic procedures, possible causes, and required testing before replacement.
Hyundai Tucson Iii C3023 Repair Cost
PCV system overhaul on the Hyundai Tucson Iii — which resolves oil-mist contamination of the MAF sensor — costs $100–$200. The MAF sensor should be cleaned ($15–$25 DIY) or replaced ($80–$150) at the same time to ensure accurate fuelling after the fix.
C3023 Description
C3023 engine trouble code is related to Exhaust Gas Recirculation Sensor B Circuit High.
Main Cause
The primary reason for C3023 OBD-II Engine Trouble Code is: Ambient Air Temperature Sensor Circuit Low.
Common C3023 Misdiagnosis on the Hyundai Tucson Iii
Workshop technicians sometimes replace the entire ignition coil assembly on the Hyundai Tucson Iii when C3023 accompanies a cylinder-specific misfire. In many cases, only the spark plug in the misfiring cylinder has fouled; a $8 plug replaces a $140 coil pack.
DIY Repair Guide: C3023 on Hyundai Tucson Iii
Replacing the oxygen sensor on the Hyundai Tucson Iii requires an O2 sensor socket (22mm or 7/8") and penetrating oil applied 24 hours in advance. On vehicles over five years old, the sensor threads often corrode into the bung; heat from a propane torch (briefly applied) is usually sufficient to free them.
Preventing C3023 on the Hyundai Tucson Iii
Transmission fluid degradation on the Hyundai Tucson Iii directly affects solenoid operation. Replacing ATF at 40,000-mile intervals (rather than the often-quoted 'lifetime fill' recommendation) is the best insurance against shift-solenoid codes including C3023.
Frequently Asked Questions — Hyundai Tucson Iii C3023
A: C3023 is a standardised OBD-II code that can appear on any make and model. However, the specific components and circuits that trigger this code, and the repair procedures involved, vary significantly between vehicles. The information on this page is focused on the Hyundai Tucson Iii.