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Q: oxygen sensors for trouble codes P0300 and P0341 on 2002 Hyundai Accent

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Actually, it's a Daewoo Lanos 2002, 1.6 L, engine
made by Hyundai. I'm at 95000. One of my neighbors has told me that before I buy these sensors ( P0300 upstream and P0341 camshaft
position sensor A Bank1, CKT range/performance ) I should clean them with
a toothbrush, and then gently wipe them down
with a proper solvent. Is he correct, or should I just go ahead and buy them, seeing that I'm
at 95K ?
Also what does Bank 1 mean ... driver or passenger side ? and CKT ?

Finally, I want to replace the timing belt that's
getting ready to fall apart. The price of the timing belt is not that bad, but the 3 piece kit
is pretty expensive. These other two metallic parts, do they wear out too, just like the timing belt ? If so, how do you check for wear ?
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Let's get this right.
Daewoo was an independent manufacturer in S. Korea until they went bankrupt and GM bought them, now they are still manufactured and distributed under a Chevrolet emblem in various countries.

The codes you posted has nothing to do with O2 sensor failure.
The P0300 is a multiple misfire code, which could be the result of the Camshaft Position Sensor failure, so forget about O2 sensors and focus on the Cam Sensor and its circuits now. There is a big chance that the sensor is failed and needs to be replaced, but wiring or computer problem could also cause this.
Here is how the CMP sensor works:

The Camshaft Position (CMP) Sensor is used to correlate crankshaft to camshaft position so that the powertrain control module (PCM)/engine control module (ECM) can determine which cylinder is ready to be fueled by the injector. The CMP is also used to determine which cylinder is misfiring when misfire is present. If the PCM/ECM receives an intermittent signal from the CMP, then the CMP Resync Counter will increment. When the PCM/ECM cannot use the information from the CMP sensor, a Diagnostic Trouble Code (DTC) is set, and the PCM/ECM will fuel the engine using the Alternating Synchronous Double Fire (ASDF) method.

Since you said the timing belt is in a very bad condition it may jumped on the sprocket and this may be the cause of the cam alignment. You can check this by lining up the cam and crank marks .

The good news is that there was a recall on the cam sensors (they tend to melt and cause fire) on the 1998-2002 engines and the dealership should replace them for free. The bad news: good luck to find a GM dealership who will honor the recall and do this repair for you.
You can call the NHTSA and ask them about the problem, they may be able to help you. Here is the recall info - including the NHTSA phone number:

Recall 04V357000: Cam Position Sensor Melting

Make / Models : Model/Build Years:

Daewoo / Lanos 1998-2002

Daewoo / Leganza 1998-2002

Daewoo / Nubira 1998-2002

MANUFACTURER: GM Daewoo Auto & Technology Company

NHTSA CAMPAIGN ID Number : 04V357000 Recall Date : JUL 12, 2004


Potential Number Of Units Affected : 11576
On certain passenger vehicles, the camshaft position sensor may melt resulting in a burning smell and visible smoke, which may subsequently lead to the melting of the camshaft cover and the camshaft position sensor wire harness.

This could possibly cause an underhood fire.

Dealers will replace the camshaft position sensors and install an additional fuse. The recall began on September 7, 2004. Owners should contact Daewoo at 1-877-362-1234, option 6, or find a local dealer through their website at

Customers can also contact The National Highway Traffic Safety Administration's Auto Safety Hotline at 1-888-DASH-2-DOT (1-888-327-4236).

Now back to the timing belt question.
You should replace ALL of the TIMING COMPONENTS. The idle and the tensioner pulley,water pump, cam and crank shaft seals also - beside the timing belt.
They all could cause a potential engine damage in the case of a failure.

In case you need instructions you can find great repair manuals with step-by-step instructions, diagrams, parts locations and other important information here:
Or here:

BTW, the replacement interval is 60,000 miles on the timing components.

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Thank you Zee. It took me a while to get back to you ...
I finally found the reply link. I found it kind of odd, that my Daewoo repair manuel didn't have a diagram of the timing belt removal and installation procedure. I've never worked
on one before, and I'm thinking that maybe it's standard for all newer cars. Am I correct on that ? If so, is there a place on the internet, that shows this diagram ?
Also, I found a website called Auto 7, that has the least expensive engine gasket kit ( it didn't say if it was a kit
for the engine, right down to the bottom ) , and here's
what I've copied and pasted for you :

Part #: AU76400130

Availability: In StockAUTO 7 ENGINE FULL GASKET SET -- An original equipment quality engine full gasket set.

List Price:$136.71
Our Price: $115.86
You Save: $20.85 (15%)

I'm just wondering if this is the kit I'll need ...
Could you give me some feedback on that ?

P.S. I noticed above, a link to Mitchells repair manuels
online, and I haven't been there yet. Do you think they might have some diagrams, concerning the timing belt
and engine gaskets ?
I know Alldata has a very detailed repair info for the Daewoo, including the timing belt.
Why do you need to reseal the engine? Any reason to buy the engine gasket kit?
For the timing belt job - beside the timing belt, tensioner, idler pulley, water pump - all you need is the 2 front camshaft seals and the front crankshaft seal. For the 3 seals I wouldn't buy the complete engine gasket kit, of course unless there are oil leaks from all over.
Here is the link for Alldata:

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