Question about 2002 Hyundai Santa Fe

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Catalytic converter needs replaced

I just had a timing belt blow on me which ended up costing $2500 in valve work to be done. Now, less than two weeks later, I sit in the mechanics shop while he replaces the catalytic converter, claiming that it couldn't possibly have anything to do with the recent engine work. Am I getting ripped off here?

Posted by wildchild5 on


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No the Cat may have failed due to the timing belt failure (high exhaust tempertures), but not due to the work they did to replace it, I have 30 years of being a technician to back me up on this one.

Posted on Sep 01, 2008


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Recommendation for replacing the catalic converters for 1997 MBE 540i

The average cost for a Catalytic Converter Replacement is between $552 and $1097. Labor costs are estimated between $196 and $248 while parts are priced between $356 and $849.Get a personalized estimate based on your location and specific car. Estimate does not include taxes and fees.
some good after market cats can be had for less then half the prices stated above. press the helpful button

540i Catalytic Converter options

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Feb 04, 2016 | Cars & Trucks

1 Answer

Catalytic Converter Replacement Repair Cost

code p0420 refers to catalytic converter system bank 1 --efficiency below threshold ===causes -- catalytic converter ---wiring---HO2S 2 sensor
The cheapest part to replace is the HO22S sensor so I would do that first. Bump the cat converter soundly with the heal of your hand and if it rattles it needs replacing as it will be cracked internally. Dismiss any tinny rattle as that will be the heat shield loose
The time taken to replace both in an accredited shop will be less than 1 hour so it may pay to shop around and compare prices on the converter and labour costs.

Feb 15, 2014 | 2005 Toyota Highlander

2 Answers

What does No ppm mean?failed e-test

Here is some info for you to read, besides me explaining what ppm is, i also gave you some info of how to solve this, Ain't that special LOL. Mike

Overall Result: PASS or FAIL. A vehicle with a properly operating engine and catalytic converter will have very low HC and CO readings. However as a vehicle ages the HC and CO emissions will increase and may become erratic. As a vehicle ages it becomes increasingly important to be sure that the engine and converter are fully warmed up before the test to have the best chance of passing the test.

HC (PPM): The parts per million of hydrocarbons (unburned or partially burnt gasoline) in the exhaust.

CO (%): The percentage of the exhaust that is carbon monoxide (CO).

CO +CO2 (%): Complete combustion in the engine or catalytic converter will result in very little carbon monoxide (CO) and a high percentage (up to about 16%) of carbon dioxide (CO2) in the exhaust.

O2 (%): When there is complete combustion in the engine or catalytic converter there is a very little oxygen (O2) in the exhaust. Usually less than one percent. A higher reading indicates a problem with the engine, the exhaust system, the sampling system or the catalytic converter. Vehicles do not pass or fail because of the O2 reading; it is only diagnostic information.

RPM: The engine speed in revolutions per minute (RPM) or N/A.

Cruise Limit: The maximum allowable HC and CO emissions at 2500 rpm. The CO+CO2 (%) must equal or exceed 6. This verifies an adequate sample of the exhaust has been obtained. N/A for O2 and RPM.

Cruise Emissions: The emission readings measured at 2500 rpm.

Cruise Result: PASS, FAIL or N/A.

Idle Limit: The maximum allowable HC or CO emissions at idle. The CO+ CO2 (%) must equal or exceed 6. This verifies an adequate sample of the exhaust has been obtained. N/A for O2 and RPM.

These are the possible problems:

bad o2 sensor
bad EGR valve
bad cat
bad timing
dirty injectors
bad plugs or wires
the less costly fixes include replacement of the o2 sensor and EGR valve i would not clean the EGR I would buy a new one there are very cheap you can pick these up at any local parts store .
also run some injector cleaner through your car at least a full tank of gas and one bottle of injector cleaner should be ran through.
you can also have your timing checked for a relatively low price.
and when you go into to have the vehicle checked make sure the car is been running because your cat convertor has to be warm in order to preform at it peak so do not do it when the car is cold.
all of the above are pretty reasonable fixes the general rule of thumb when you work on your own vehicle is start with the cheapest fix first then go on to the next.

Aug 11, 2011 | 2000 Saturn Ls 4dr Sedan

2 Answers

Difficulty accelerating and it simply sounds rough

The Timing Belt runs from the Crankshaft of the engine.
In turn, it goes around the Camshaft gear, or gears.

The Camshaft opens the Valves in the Cylinder Head.

These valves open to bring in the air/fuel mixture, (Intake Valve/s), and let out the Exhaust.
(Exhaust valves)

These must be done in a precise fashion.

If the Intake valve closes too late, you will lose compression, hence power.
If the Exhaust valve opens too early, you will early you will lose power.

When a timing belt stretches due to wear, it allows the above conditions to happen.

(The Timing Belt has teeth on the inside of it. These teeth match notches on the timing gears. One gear for the Camshaft, or Each camshaft, and one for the Crankshaft.

The teeth wear down, and the belt also stretches. All it takes, is a discrepancy of a few thousandths of an inch.

An average human hair is .003 thick. Three thousandths.
60 thousandths stretch of the belt will cause these problems. 60 thousandths is approximately 1/16th of an inch)

This animation may help to explain how your Four Stroke engine in your Volkswagon works. This way you can see the Cylinder Head, Camshaft, Crankshaft, and Valves that I have been referring to,

Doesn't show the Timing gears, or timing belt.
The animation at the top right of the page, shows an engine with dual overhead camshafts.

Two camshafts.

This shows how a timing belt is incorporated,

Yes, if the timing belt is known to be bad, this will definitely cause a power problem.

A clogged Catalytic Converter will also.
There are pellets inside a catalytic converter.
These pellets would remind you of small peas.

Over time they break down, and form clumps. The clumps can restrict the exhaust gases from escaping out of the catalytic converter, and cause back pressure.

This will rob the vehicle of power. After time the restriction may be so great, that no exhaust gases will be allowed to escape, and the vehicle will not run.

Dec 19, 2009 | 1999 Volkswagen Beetle

2 Answers

Renault modus dashboard warning light 'check emissions' and rotten egg pong and lumpy drive. Car has done less than12K but did fill up at Asda previous evening before problem started.

Not necessarily catalytic convertor. this happened on mine recently and it just needed a coil replacing. Costs about £87 at a Renault garage if this is the case

Jun 07, 2009 | 2005 Renault 181

1 Answer

Pricing on a timing belt for a 2004 odyssey

If you're asking for pricing on parts and labor, it's a approximately $500 to $600. BUT remember, it's still a small price to pay when replacing the timing belt before it breaks. First, your Odyssey is an interference motor(once the belt breaks, it damages your intake and exhaust valves). Secondly, you don't want to be stuck in the middle of highway and face towing charges. The cost to do the valve job and timing belt could run you in the mill of $2500 when all said and done. Hope this helps

Apr 27, 2009 | 2004 Honda Odyssey

1 Answer

I have a 1995 Jeep Wrangler. I needed a new muffler and a good tune up. The mechanic replaced the catalytic converter and muffler, including a tune up. The check engine light remained on (steady light) and...

If work was performed either without permission from you, ie: o2 sensor? they cannot charge you for it. If work done is sub- standard, you have the right to a refund or correction to problem (at no charge) If any work done fails within 60 days, Same applies. (this is common to most state laws)
Noise and discharging sounds like a broken serpentine belt or bad alternator but I can't see/hear it from where I'm sitting. In my opinion, if the shop did not adress this problem, shame on them. But since they did no repairs related to this, they have no liability pertaining to that issue. Best thing to do is to have them resolve problems they caused, then find a more reliable shop to service your vehicle in the future!
Your state may have a complaint resolution department as part of DMV. It wouldn';t hurt to get them involved in this>
Good luck, RS

Dec 15, 2008 | 1994 Jeep Wrangler

2 Answers

2001 jetta wont rev past 3,00 rpm

sounds like something was set up wrong.timing belt sensor/ or work on mechanicals not clean..valves/piston damage...or....alot of junk went through motor when this occurred and your catalytic converter is clogged

Dec 08, 2008 | 2001 Volkswagen Jetta TDI

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