Generic OBDII Live Data you can get from your Aston Martin DB9

Aston Martin DB9 PCMUsing an OBDII code reader you can retrieve a substantial amount of data from your DB9’s Powertrain Control Modules (PCMs).   In an earlier blog post I explained how to connect an aftermarket OBDII code reader to the car.   In this post I want to detail the 45 pieces of Live Data information that will be accessible using the generic OBDII codes.

Selecting Live Data on my OBDII ReaderAfter linking my Autel MaxiDiag Elite MD802 to the OBD port, and selecting OBDII Scan, I can select Live Data.   Below is a list of:

  • The powertrain parameter name as shown on the code reader
  • My verbose explanation of what it is if I could figure it out.  I certainly don’t know what all of them mean, but I will add to them as I learn.
  • The value and unit of measure shown for my car (in case you want to compare to yours).  My car was warmed up and at idle while I ran through the codes.

Live Data Available

  • DCT_CNT [diagnostic trouble code count – how many issues your car has at the moment]   0
  • FUELSYS1 [Fuel System Status (Open/Closed Loop) – Bank 1]   CL
  • FUELSYS2 [Fuel System Status (Open/Closed Loop) – Bank 2]   —
  • LOAD_PCT [load percentage]   26.7 %
  • ECT [engine coolant temperature]   192 °F
  • SHRTFT1 [short term fuel trim 1]   6.3 %
  • LONGFT1 [long term fuel trim 1]   -8.6 %
  • SHRTFT2 [short term fuel trim 2]   6.3 %
  • LONGFT2 [long term fuel trim 2]   -8.6 %
  • RPM [engine RPM]   807 RPM
  • VSS [vehicle speed sensor]   0 mph
  • SPARKADV [spark advance]   13.0 °
  • IAT [intake air temperature]   86 °F
  • MAF [mass air flow]   0.01 lb/s
  • TP [throttle position]   12.2 %
  • O2SLOC   B1 S1 2 –B2 S1 2 —
  • O2B1 S1   0.310 V
  • SHRTFTB1 S1  [short term fuel trim bank 1 S1]   0.310 V
  • SHRTFTB1 S1  [short term fuel trim bank 1 S1]   0.8 %
  • O2B1 S2   0.100 V
  • SHRTFTB1 S2  [short term fuel trim bank 1 S2]   99.2 %
  • O2B2 S1   0.485 V
  • SHRTFTB2 S1  [short term fuel trim bank 2 S1]   -0.8 %
  • O2B2 S1   0.855 V
  • SHRTFTB2 S2  [short term fuel trim bank 2 S2]   99.2 %
  • OBDSUP [OBD Language Supported]   EOBD&OBDII
  • RUNTM [runtime since engine start]   905 sec
  • MIL_DIST [distance since MIL lamp triggered]   0 miles
  • FRP [fuel rail pressure]   52.8 psi
  • EVAP_PCT   0.0 %
  • FLI  [fuel level indicator]   94.1 %
  • WARM_UPS [engine warm ups since last time error codes erased]   0
  • CLR_DIST [distance since error codes erased]   0 miles
  • EVAP_VP   -0.138 in H2O
  • BARO [barometric pressure]   14.8 psi
  • CATTEMP11 [catalyst temperature 11]   1032 °F
  • CATTEMP21 [catalyst temperature 21]   1032 °F
  • VPWR [module supply voltage]   15.038 V
  • LOAD_ABS   19.6 %
  • EQ_RAT   0.999
  • TP_R   1.6 %
  • AAT [ambient air temperature]   63 °F
  • TP_B   12.5 %
  • APP_D   20.0 %
  • APP_E  9.8%

Ford LogoIf you have a more advanced OBDII reader that can speak native ‘Ford’ communication codes, there is a lot more information available to you, and I detail how to access it in this blog post, plus I have a list of all the available data in this other blog post.  All of the generic OBDII information listed above (45 values) is included in the more complete list of data this technique yields (202 values).   Worth the effort if your code reader can do Ford specific codes.

Here is a short video showing how to access the generic OBDII codes live data and scrolling through the values.

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