2004 Accord 2.4... How much mileage have you clocked up so far?

Price on O2 sensors varies from car to car. My B14 Sentra's O2 sensor (Bosch) cost around RM300, but some may cost higher depending on make and model.

Dude, I suggest you take your Accord to another trusted mechanic to check if it's really the O2 sensor that's giving problems. If he can confirm that, only then go to buy the part.

As to which shop to go to, it really depend on where you are, man. If you're in PJ area, by all means go to PH Auto.

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Added on March 13, 2008, 11:31 amO2 Sensor failures

Normally, the lifetime of an unheated sensor is about 30,000 to 50,000 miles. Heated sensor lifetime is typically 100,000 miles. Failure of an unheated sensor is usually caused by the buildup of soot on the ceramic element, which lengthens its response time and may cause total loss of ability to sense oxygen. For heated sensors, normal deposits are burned off during operation and failure occurs due to catalyst depletion, similar to the reason a battery stops producing current. The probe then tends to report lean mixture, the ECU enriches the mixture, the exhaust gets rich with carbon monoxide and hydrocarbons, and the mileage worsens.

Leaded gasoline contaminates the oxygen sensors and catalytic converters. Most oxygen sensors are rated for some service life in the presence of leaded gasoline but sensor life will be shortened to as little as 15,000 miles depending on the lead concentration. Lead-damaged sensors typically have their tips discolored light rusty.

Another common cause of premature failure of lambda probes is contamination of fuel with silicones (used in some sealings and greases) or silicates (used as corrosion inhibitors in some antifreezes). In this case, the deposits on the sensor are colored between shiny white and grainy light gray.

Leaks of oil into the engine may cover the probe tip with an oily black deposit, with associated loss of response.

An overly rich mixture causes buildup of black powdery deposit on the probe. This may be caused by failure of the probe itself, or by a problem elsewhere in the fuel rationing system.

Applying an external voltage to the zirconia sensors, e.g. by checking them with some types of ohmmeter, may damage them.

i have a GA16DE factory service manual with me. to check the O2 sensor u not just need to use the palm/diagnostic tool to check but u also need a voltmeter to test the O2 terminal. problem is how professional is TC mechanic. hehe.............. some of the TC mechanic talk as if they are god one. they say no rosak means no rosak. haha.......... and how experience are they in checking O2 sensor is another question. i saying so because not much people wil actually ask mechanic to test their O2 sensor. majority people thinks that O2 sensor has a span life of life time including me until i found out that this O2 can be bad as early as before 100,000km mileage. the life time for heated O2 sensor is 100,000miles roughly 160,000km. after u mentioned u only need 1 sec to start ur car, just like my fren n16, 1 sec to start his car. i start to fear that my O2 sensor is actually bad.