Now the check engine light has come on again, with the same O2 sensor low voltage and I do not know what
Mode $06 - On-Board Monitoring -
Component Id $00 - TID $72 - Manufacturer Defined - 0 - 40 - N/A - Fail
See attached full report
Thanks for any help
- Diagnostic Report 2017-05-10.pdf
- (144.87 KiB) Downloaded 13 times
p0137 is B1S2 that is POST cat sensor "downstream".
I will check BUT I think $72 is EVAP and I see the monitor not complete - there is a PENDING file for codes can you check it?
As for looking at codes live data will help -
look at the voltages for ALL o2 sensors
I am not sure if it is a Mitsubishi
I will pull live data - I do not know how to find the pending code - I thought it was the same
if p0137 is downstream that must be the issue?
SWAG a wiring issue at sensor.
To set a code Evap system requires several tests and there are conditions to be meet -some as unrelated to EVAP as fuel level, ECT, Speed and other issues.
Ask the manufacturer of scanner about pending codes they are all different.
Lets work that (P0137) and recheck.
See updated OBD log
- Diagnostic Report 2017-05-22.pdf
- (144.81 KiB) Downloaded 7 times
need to know what the voltage is - then try to manipulate it rich (hugher viltage) to confirm wiring is ok.
how do I manipulate it rich?
Doesn't the report show the Mode 1 powertrain data show the 02 bank2 sensor 1 voltage .5 and sensor 2 as .94 volts? what is the range?
Thank you so much for your help
- Diagnostic Report 2017-05-23a.pdf
- (30.47 KiB) Downloaded 5 times
•2.7L V6 VIN R Automatic
•2.7L V6 VIN R Standard
•2.7L V6 VIN R U/K
•2.7L V6 VIN T Automatic
•2.7L V6 VIN T Standard
•2.7L V6 VIN T U/K
Trouble Code: P0137 (2.7L V6 VIN R Auto)
O2 (B1 S2) Sensor Circuit Low
Engine running; battery voltage over 10.9v; O2 heater temperature below 484ºF (251C) or ECT above 170F from previous key off. The PCM detected the O2 Sensor signal voltage was less than 2.402v for 9 seconds
•O2 return circuit is shorted to ground
•O2 signal circuit is shorted to ground, or to O2 return circuit, or O2 heater ground circuit
•O2 Sensor has failed
•PCM has failed
I have replaced the upstream and downstream O2 sensor
in Mode 6 - I have a fail on
Component Id $00
TID $72 - Manufacturer Defined
Reads 0 - should be 40 min
Do you know what that is measuring
Thanks again for all the help
- Diagnostic Report 2017-05-30.pdf
- (30.38 KiB) Downloaded 2 times
CID - Component id
TID - Test id
It's failing test $72 - could not find out what test is it.
what is strange as one time it passes...
Component Id $7F TID $72 - Manufacturer Defined 65535 65535 N/A Pass
other time failing...
Component Id $00 TID $72 - Manufacturer Defined 0 40 N/A Fail
difference between them are cid values $7f and $00, then values, "value, minimum, maximum"
value, minimum, maximum and result
65535, 65535 , N/A, Pass
0, 40 , N/A, Fail
SAE 0x15 O2 voltage (Bank 1, Sensor 2) 1.27 V
SAE 0x19 O2 voltage (Bank 2, Sensor 2) 1.27 V
why is failing just bank 2 as bank 1 has same values also, confusing.....
I notice that as well, sometimes it passes, other times it fails
I have no idea what $72 is
I was wondering is bank 1 the upstream and bank 2 the downstream O2 sensor -or how to tell witch is witch
what is sensor 1 verse sensor 2? (Is that some systems have two sensors? in this case there is only one o2 sensor per bank?
Please have a look at this:
https://www.densoproducts.com/learning- ... tion-guide
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