Code P0153 Help

[96Z28SS]

I have installed the SLP
header and Now I am getting a
P0153 02 engine code.

Can any one help?


thanks

[Joe 1320]

Here is a list of generic OBDII trouble codes from autotap's website:

http://www.autotap.com/generic_trouble_codes.html

P0153 - HO2S Slow Response Bank 2 Sensor 1


Most likely the sensor became fouled from either a penetrating lubricant or it was on it's way out anyway. You could try to clean the harness connections with dedicated contact cleaning spray, but I suspect a new sensor will be needed.

[Rob B (shoebox)]

After reading many posts about header installations, it looks like the fumes from new headers curing is apt to foul O2 sensors. Use old sensors until the headers are burned in and then put some new ones in.

[Injuneer]

Following up on Rob's post.... are your SLP headers ceramic coated (e.g. Jot Hot, Airborn, Swain, etc.)? The SLP's are stainless steel, and many people assume they don't need the coatings, but they are still a good idea.

I've been pursuing the "slow response after installing coated headers" on the Advanced Tech forum of CZ28.com, but we weren't able to reach any significant conclusion other than that a lot of people who install coated headers end up with the O2 sensor slow response code shortly thereafter.

Conversely, someone on CZ28.com has suggested that this problem is due to people slathering the incorrect anti-sieze on new sensors. If you used AC/Delco sensors, the package clearly indicates that the correct CONDUCTIVE anti-sieze was applied to the sensor threads at the factory, and no further anti-sieze is needed. Did you use an anti-sieze compound?

Do you have extensions? Commercially made or self-made?

Did you use any RTV in any part of the header install? Was the RTV marked "sensor safe"?

Did you use penetrating oil to remove the sensors from your old exhaust? The outside of the sensor housing can be contaminated, and this can cause problems if the contaminant enters the inner chamber where outside "air" is exposed to the outside surface of the sensor membrane.

[96Z28SS]

Fred,

I have installed the polished aluminum-CERAMIC COATED 4-into-1 headers from SLP part# 30017C

Did you use an anti-sieze compound?
I am using the old sensors and the
anti sieze used is sensors safe.

Do you have extensions? No.
I installed the short headers.

Did you use any RTV in any part of the header install?

What is RTV?
Any sealent used I made sure was sensor save.

Did you use penetrating oil ?

Yes I used Blaster PB.
This may have caused my problem.

The car has been setting for about
5 months with 3/4 tank of gas, could this have caused the sensor problem.

After the headers are burned in, I will replace the sensors.
What type do you recommend?

Thanks very much for you help.

ed

[Joe 1320]

Originally posted by 96Z28SS
What is RTV?
Any sealent used I made sure was sensor save.

Did you use penetrating oil ?

Yes I used Blaster PB.
This may have caused my problem.

The car has been setting for about
5 months with 3/4 tank of gas, could this have caused the sensor problem.

After the headers are burned in, I will replace the sensors.
What type do you recommend?

RTV is silicone sealer. Even trace amounts that end up burning in the exhaust will coat the sensor, rendering it useless. There are 02 sensor safe silicone sealers.

The PBlaster is great stuff but that will foul the sensor.

The car sitting should not have caused the problem.

The stock Delco sensors work just fine in stock to moderately modified.