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2007 Hyundai Santa Fe P0300, P0303, P0305, 2A00 and 2196 - Diagnosis and Repair Guidance

Model: 2007 Hyundai Santa Fe Fault Code: P0300 Posted: 2015-10-28 08:38

My girlfriend recently experienced severe running issues with her 2007 Hyundai Santa Fe 3.3L engine. The vehicle would run roughly at times, then suddenly become stable again. After she called me, I advised her to visit an auto repair shop for a diagnostic scan. The results showed the following trouble codes: P0300 (Random/Multiple Cylinder Misfire), P0303 (Cylinder 3 Misfire), P0305 (Cylinder 5 Misfire), 2A00, and 2196. Based on these codes, I suspect a faulty oxygen sensor or worn spark plugs and ignition wires. The vehicle has approximately 70,000 miles, with only oil changes performed during maintenance. No other servicing has been done. Given the age and mileage, I'm concerned about potential underlying issues but want to avoid unnecessary repairs. I’m looking for a systematic approach to diagnosing and fixing this issue—especially which oxygen sensor(s) might be failing, whether spark plugs or wires need replacement, and what parts to use (OEM vs. aftermarket). Any insights from experienced users or technical sources would be greatly appreciated.

Related fault codes
P0300P0303P0305
Comments (6)
Anonymous 2015-10-28 09:47

There is a Technical Service Bulletin (TSB) available for this issue: TSB #08 FL 002-1. It specifically addresses the symptoms and diagnostic codes you're seeing. I recommend discussing it with your local Hyundai dealer. If replacement sensors are needed, use only original Hyundai parts to ensure compatibility and warranty coverage. Note: A TSB is not typically provided free of charge by dealerships.

Anonymous 2015-10-28 11:16

Thanks for the tip, kev2! I checked the TSB and confirmed it matches our vehicle's symptoms and codes. I also contacted two nearby Hyundai dealerships—both require ordering parts, with a total cost of $128 plus tax. I'm wondering why the recommendation is to use only Hyundai OEM parts? Can't we consider aftermarket brands like Denso or Bosch instead? Are they equally reliable and more affordable locally?

Anonymous 2015-10-28 11:42

It's a risk when choosing aftermarket parts—quality can vary, and we often avoid comebacks that could lead to repeated failures. In automotive repair, OEM parts are generally preferred for reliability. Your call: the TSB includes part numbers, so you can search online or at retailers using those codes. Our dilemma: when OEM prices are high, we consider aftermarket; but when aftermarket quality appears poor, we go back to OEM.

Anonymous 2015-10-28 11:43

It's a risk when choosing aftermarket parts—quality can vary, and we often avoid comebacks that could lead to repeated failures. In automotive repair, OEM parts are generally preferred for reliability. Your call: the TSB includes part numbers, so you can search online or at retailers using those codes. Our dilemma: when OEM prices are high, we consider aftermarket; but when aftermarket quality appears poor, we go back to OEM.

Anonymous 2015-10-28 13:40

Got it—after a quick online search, I found the parts on Amazon. Both OEM-grade sensors (same part number) are available there. The dealer price is $128 and $110, but Amazon offers them for just $61 and $16 respectively. For example, the right front oxygen sensor (P/N 29210-3C300) costs only $16 at Amazon—compared to $128 from dealers. That’s a huge difference. What could be the catch? Are there hidden issues with using non-dealer sources?

Anonymous 2015-10-28 14:55

kev2 wrote: 'When I see the price of OEM, I think aftermarket. When I see the quality of aftermarket, I think OEM.' Ain't that the truth!