I think the first thing I would do is clear the codes and see how many come back after you drive it.
Code 30 and 36 are for the heater circuit in the O2 sensors on bank one. I doubt it would be both sensors, so it may be a wiring problem.
Code 102 is for a low signal from the mass air flow meter which could also be a wiring problem or the sensor or a dirty air filter.
Code 443 is for a problem with the evap purge solenoid circuit which again could be a wiring problem or the solenoid.
Thank you very much to all of you , i cleared the code but it popped back on again , and then i started looking for any cuts in the wire , all wires appeared to be ok and then looked at the fuse box , found that one of the fuse was blown # 19 on my van replaced it and cleared the code . and its gone lets see if it blows up again. then i would have to figured out why does it blow up . but for now looks good . thank you for all your help guys .
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SOURCE: codes p0030 p0036 p0050 p0056
May be errant codes from losing power, erase them and see if they come back - [ I'm betting they won't.]
SOURCE: 1995 Cadi SLS Codes, P0030
Hi there,
P0030 = HO2S Heater Control Circuit (Bank 1 Sensor 1) - No.1 Heated Oxygen sensor on bank 1.
P0036 = HO2S Heater Control Circuit (Bank 1 Sensor 2) - No. 2 Heated Oxygen sensor on bank 1
For both of these to trigger on the same bank, means most likely an Open or Short to Ground condition (somewhere on the Bank 1 circuit) stopping the HO2 sensors from reaching their working temperature.
Check the following in this order:
1) Using a multimeter, check 'continuity' of the Oxygen circuit FUSE terminals (don't rely on visual inspection alone) or replace fuse with a known good one.
2) Check for moisture getting into both oxygen sensor connector terminals (bank 1).
3) Check for good connection at Oxygen sensors (bank 1).
3) Have both heated oxygen sensors on Bank 1 tested (ensure their values are to specification).
4) Check HO2 pin-outs of the PCM for correct voltage.
Only replace the HO2 sensors as a last resort (if out of spec).
Then engine department relay centre & fusebox location is behind the washer bottle, but I believe the HO2 sensors are connected direct to the PCM, not a relay.
Cheers,
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Thank you very much .
Were you able to fix it?
I also have a 2007 Uplander with the exact same codes.
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