2003 Hyundai Sonata: check engine light

6 of the 199 complaints about the 2003 Hyundai Sonata describe check engine light.

owner complaints: 6
of this car's complaints: 3%
typical mileage: 106,111
recalls: 0

Is there a fix? 18 service bulletins cover this area of the car. See below

Check engine light by model year

2025
1
2023
17
2022
14
2021
17
2020
32
2019
21
2018
80
2017
137
2016
142
2015
217
2014
86
2013
163
2012
133
2011
183
2010
16
2009
31
2008
19
2007
14
2006
39
2005
5
2004
2
2003
6
2002
13
2001
7
2000
12
1999
7
1998
1
1997
7
1995
1
1993
1

What owners say

Filed Dec 5, 2017 · Engine · 139,000 miles · FL

Tl* the contact owns a 2003 hyundai sonata. The contact stated that the vehicle failed to start when attempted to drive. The check engine warning indicator illuminated. The failure recurred once. The vehicle was taken to potamkin hyundai (6200 nw 167th st, miami lakes, fl 33014, phone: (305) 728-5030), but was not diagnosed or repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 139,000.

Filed Feb 2, 2016 · Fuel system · 106,111 miles · IL

Took car to dealer for oil change, front brakes and check engine light... Was told tech wouldn't touch evap canister or purge valve because fuel lines were too corroded in the vicinity of the needed repair that they may fracture... This car is only 12 years old... Coincidently my mother-in-law had a 2004 hyundai xg350l in which the fuel tank and fuel lines were corroded to the point that they were leaking and she had to replace the vehicle d/t the cost of repairs... I too am now faced with replacing my vehicle d/t high repair costs... I have driven many automobiles, of note a 1967 vw beetle (during the years 1997 thru 2002) in chicago with the snow and salt and never had issues with corrosion of any lines and I did all the work on that car! It was clean... What materials is hyundai using for it's fuel lines and fuel tanks that they are corroding/rusting out... My car, the 2003 hyundai sonata was 100% garage kept!

Filed Feb 21, 2011 · Engine · 85,000 miles · KS

2003 hyundai sonata egr issues (check engine light 401)- I've been having persistent issues with my vehicle's egr system for over a year now. I have replaced the entire egr system including the egr valve, solenoid, etc. I have also had to replace other parts that have failed due to the malfunctioning egr - ignition coils, spark plugs. Even after replacing all these parts, my vehicle still complains about the egr with check engine light constantly on (401). I have also been getting very poor mileage. I contacted hyundai about a tsb they sent out to dealers for egr diagnosis. Hyundai denied assistance with this issue and asked me to contact the dealership directly. The dealer wants to charge me a diagnostic fee to look into the issue + fees for parts. Searching on the internet, I found several cases of egr malfunctioning with 2003 models. Hyundai needs to look into this.

Filed May 18, 2010 · Electrical · 123,289 miles · KY

Air bag light stays on, was intermittent at first but now stays on all the time. Have an appointment at the dealer to check to see if the system is working properly. Also the check engine light is intermittent. Also the antenna has now stopped going up and down.

Filed Dec 15, 2009 · Fuel system · FL

I own a 2003 sonata the engine light came on, I have an emission leak the machine says. I need help has this happened to any one else. Also my gas problems, when putting gas in my car the gas cap clicks as if the tank was full when talking to local dealer all they want to do is quote prices!!!!!!!!! No explanation of why these thing are happening.

Filed Aug 10, 2009 · Engine · 90,000 miles · IL

While driving car just stops. It has done this several times but starts back up once you put in park. However this time it stop while driving and did not start back up. The first it happen I took it to the shop and they said they could not find anything wrong. Even though the "check engine" light was on. Now it will not start at all.