My 2005 santa fe 3.5 suddenly started running very rough the other day. the tac started jumping up and down and there was a bad odor i could smell then the engine light came on. i had it checked at auto zone and there are 7 codes that came up twice. P0300,P0301 through P0306. The guy at auto zone said that with 150,000 miles i probably have bad plugs, coils and wires. so i replaced them all and cleared the codes. NOT FUN! the car ran perfectly for about 20 miles then the same exact thing happened and thesame codes came up x2. what could be the problem?????

SOURCE: start and diesss

p0456: evap system. sensor failure
p0172: evap system. intake blocked
p0778: exaust valve control. solenoid/ecu faukt
p0300: cylinders misfire. check ht/ignition leads
p0301,303,304,305,306: same ht leads

hope this helps..

PAUL MC G

• 1280 Answers
• Posted on Jul 01, 2011

SOURCE: Hey there, 2005 Hyudai Santa Fe, with multiple

Each one of the codes indicate misfire, except p0320.

1. Check IG failure sensor (1) Connect IG failure sensor and PCM connector (2) Engine "ON" (3) Check that RPM meter on instrument panel is operating correctly and the signal waveform of IG failure sensor at terminal 4.

(4) Is the IG failure sensor normal? YES ??¶ Substitute with a known - good PCM and check for proper operation. If the problem is corrected, replace PCM and go to "Verification of Vehicle Repair" procedure. NO ??¶ Substitute with a known - good IG failure sensor and check for proper operation. If the problem

Testimonial: "looks like I had a bad IG sensor because I just drove it 10 miles and no check enigne klight. I will plug the old one in and see if it kicks a code."