Did all the repairs Cat converter, spark plugs & wires, oil change, intake manifold, idle control, starter, coolant temperature, O2 sensors ACDelco, all filters, fuel pump, gas cap mass air flow, EGR
You sent a ton of money replacing all those parts ! For what ? The original problem ? Who replaced them ?
DTC P0138 HO2S Circuit High Voltage Bank 1 Sensor 2
Oxygen sensor has been rich (534 mV (0.534V) or greater) for 40 out of 50 seconds.
DTC P0135 HO2S Heater Performance Bank 1 Sensor 1
The PCM monitors the rear heated oxygen sensor input to determine when its voltage becomes either 151 millivolt less than or 151 millivolt greater than average rear heated oxygen sensor bias voltage for 0.1 second. If it takes too long, DTC P0135 will set.
DTC P0141 HO2S Heater Performance Bank 1 Sensor 2
The PCM monitors the pre-converter heated oxygen sensor input to determine when its voltage becomes either 151 millivolts less than or 151 millivolts greater than average pre-converter heated oxygen sensor bias voltage for 0.1 seconds. If it takes too long, DTC P0141 will set.
DTC P0155 HO2S Heater Performance Bank 2 Sensor 1
An intermittent open in CKT 39 or 250 may cause DTC P0155 to set. Additionally, a malfunctioning front oxygen sensor heater may be the cause.
If you replaced the O2 sensors an the codes came back you have wiring or computer problems . Did you test the heater electrical circuits , can use a volt meter , can all so check circuit for O2 sensor singal to PCM with volt meter . Is the fuse that powers the O2 heater good ? OXY SEN 1 fuse 10amp located in the engine compartment fuse box ? Did you check the wires for melting on manifolds or anywhere for that matter ?
All of those codes listed have a common fault listed and that is the ECM
substitute it with a known good unit and then see what happens
Testimonial: "with a new computer right"
A new computer right?
I never advocate new as that is a cost that may not rectify the problem
I say a known good unit ( wreckers or mates car)
Put a reprogramed PCM by vin number in my car drove for two hours the service engine lite came back on with the same codes...I don't know what else to do
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