Cadillac Catera (1998) Replaced Bank 1 Sensor 1 and Bank 2 Sensor one, codes P0135 AND P0155. Check Engine light came right back on Replaced ECM, 13 miles later the light is back on, replacing the aftermarket sensors with Factory ones from GM because the aftermarket sensors aren't working, Any ideas?
The codes have been cleared and while waiting on the Factory parts arrival we are going to clear them out and reset it again and see how long it takes for it to come back on.The codes have been cleared and while waiting on the Factory parts arrival we are going to clear them out and reset it again and see how long it takes for it to come back on.
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If they are codes P0135 and P0155 they refer to both O2 sensors nearest the engine on the exhaust. The ones before the catalytic converter on each exhaust pipe.
P0135 = O2 Sensor Heater Circuit Bank 1 Sensor 1 P0155 = O2 Sensor Heater Circuit Bank 2 Sensor 1
Your checking for generic codes only & throwing
parts at it
You get a couple possible worn or failed parts & have
a few less codes
There is no need to clear ALL Data every time you change a part
You need to STOP
You need professional scan tool software to look at ALL data & go for a road test first
You keep clearing stored data ,so now the process will take longer
You work one code & one system at a time
NO PARTS get replaced that are not tested & found to fail
a test,thus a worn out part.
You need both Factory Emission & Diagnostic Manual, as well
as Wiring Diagram Book-- BEFORE-- you can even walk to the vehicle (Helm.Com)
You have nothing to go by,no system knowledge & no trouble charts,& no wiring diagrams to start your testing
If you got no scan tool & no volt meter & no oscilloscope,
your done,vehicles have to be tested to find a problem,any
problem,resolve it & continue on.
kia ora Mark , greetings , sorry bro these code things are beyond me ive been driving around with a p0161. i believe its a bank2 down stream sensor for 2 years , maybe you can help me , 2002 grand cherokee 4.7 Ho , do you know what brand of sensor or part numbers i need , an idea of cost for same . i forgot to mention i am in New Zealand and auto parts are so much more expensive here , no idea at all , much help needed everyone thank you all , hope you get sorted Mark cheers mate
DTC P0125 - Insufficient Coolant Temperature For Closed Loop Fuel Control
The simplest thing to do is to reset the code and see if it comes back. If the code comes back, the problem is likely going to be the result of the above causes (faulty thermostat, faulty ECT sensor, or a low coolant level).
HO2S no. 1 heater circut is open or shorted
HO2S no. 1 is defective
Defective ECM
Using a scan tool, read freeze frame data. Freeze fram data records engine conditions when a malfunction is detected.
Access ECM behind glove box. Turn ignition on. Using DVOM, backprobe
ECM harness connector. If DTC P0135 is set, measure voltage between
ground and terminal No. 3 (Blue/Black wire) at ECM harness connector
E10. If DTC P0155 is set, measure voltage between ground and terminal
No. 4 (Yellow/Red wire) at ECM harness E10. Voltage should be 9-14
volts at each terminal. If voltage is as specified, replace ECM.
If not, Disconnect suspect HO2S No. 1 harness connector. Measure
resistance between terminals B+ (Black/Yellow wire) and HT (Blue/Black
wire on bank No. 1 ; Yellow/Red wire on bank No. 2) at HO2S connector
(component side). Resistance should be 11-16 ohms at 68 degrees F and
23-32 ohms at 1472 degrees F. If resistance are not specified, replace
appropriate HO2S. If resistance are specified, Repair wiring between
ECM and appropriate HO2S, or between appropriate HO2S and EFI main relay
(Black/Yellow wire at HO2S and Red wire at EFI main relay)
with those codes showing, it could be either bad O2 sensors or there is a problem with the wiring to those sensors. Also, the wrong sensors may be installed. I'm assuming codes P0134, P0135, P0155.
The codes have been cleared and while waiting on the Factory parts arrival we are going to clear them out and reset it again and see how long it takes for it to come back on.
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