[J Patrick]

2019 Venice. When I connect a scanner (Blue Driver) to the OBD II port, I get the following DTC codes. (Note: If I let the scanner recognize the VIN, I see only the P0650 code. My purchase dealer told me Vanderhall says that code will always show and is not significant. The other (enhanced) codes show up if I tell my scanner it is looking at a 2013 Chevy Cruze.)

Engine Control Module Trouble Codes:
P0650: MIL Control Circuit/Open

Body Control Module Trouble Codes:
B2545: Backup lamps circuit malfunction
B257B: Check report for description.
B2585: Parklamp control circuit malfunction
B2645: Ambient light sensor circuit malfunction

Anti-Lock Brake System Trouble Codes:
B3902: Check report for description.
U0125: Lost Communication With Multi-axis Acceleration Sensor Module
C0277: Check report for description.

Are any of the BCM codes significant since all(?) are related to hardware the Venice doesn't have?

For the ABS codes, not sure about the first two, but the last one (C0277) can be related to the Brake Pedal Position Sensor (BPPS). That seems reasonable to me since my brake lights come on only when the brake pedal is almost fully depressed. In addition, the BCM and ECM were replaced in my Venice and the information I've seen about the GM components indicate the BPPS should have been recalibrated after the service and it was not. (Still trying to get that done.)

Any comments or additional information? I've had the Venice for 5 months and have been seeing this kind of stuff since day 2. Driving me crazy! (Closest dealer is 2 hours away and couldn't help. Next closest is 3.5 hours, but haven't tried that one. Had it worked on at a dealership 5 hours away--unresolved. Purchase dealer no longer carries Vanderhall.)

[gudgeonpin]

Hi J Patrick,
Thanks for this information- I've got an 'ABS' light illuminated on the dash, but have not yet tracked down the reason.  I was wondering about that P0650 code.  Now I don't have to anymore.   
When I have a chance to run enhanced diaganostics on mine (2017 Venice), I'll post results.  

Oh- when you connect the Blue Driver OBD scanner, do your instruments act funny (like not at all)? Mine will read either zero's (0 mph/ 0 rpm/ 0 degrees on coolant), or they will act sluggish.

Jason

[J Patrick]

Hi J Patrick,
Thanks for this information- I've got an 'ABS' light illuminated on the dash, but have not yet tracked down the reason.  I was wondering about that P0650 code.  Now I don't have to anymore.   
When I have a chance to run enhanced diaganostics on mine (2017 Venice), I'll post results.  


Jason

I had ABS illuminated as well. Rotation sensor in a front wheel was bad. Replaced under warranty and all appears OK now. Relative to service manuals, I assume from a kind-hearted dealer?

[gudgeonpin]

More trouble codes-
Using the Bluedriver OBD II reader, with the 2017 Vanderhall set as a 2013 Chevy

Several codes corresponding to equipment not found on the Venice
B1516, B1517 (seat driver occupied)
B1529 (memory set switch)
B2545 (backup lamps)
B370B (????)
B3867 (right front parking lamp short or open circuit)
B3902 (incorrect immobilizer ID received)
P0580 (cruise control circuit low) I don't have CC
P0650- see Patrick's comments above

Then some that matter-
B1405, Control Module Voltage Reference Output 2 Circuit Low Voltage.
Not sure about this one- the voltage is ~14.8 V (from memory) while running, which is within spec.

C0035, LF wheel speed sensor circuit malfunction
I assume this is why my ABS light is illuminated. I guess I'll check the wheel sensor next. Hopefully a simple fix.

P0480, Fan 1 Control Circuit
This one concerns me- I have swapped all the relays and checked all the fuses, but it persists. On a hot day, driving very slowly, the engine coolant temperature goes up to 200 F, and the fan- I think- comes on about 220 F. I have hardly ever heard it come on and I suppose I should check the fan operation with a direct connection to the battery.
Tooling around, the coolant runs about 200 or less. What temp is normal?

[J Patrick]

More trouble codes-
Using the Bluedriver OBD II reader, with the 2017 Vanderhall set as a 2013 Chevy

Then some that matter-
B1405, Control Module Voltage Reference Output 2 Circuit Low Voltage. 
Not sure about this one- the voltage is ~14.8 V (from memory) while running, which is within spec. 

C0035, LF wheel speed sensor circuit malfunction
I assume this is why my ABS light is illuminated.  I guess I'll check the wheel sensor next.  Hopefully a simple fix.

P0480, Fan 1 Control Circuit
This one concerns me- I have swapped all the relays and checked all the fuses, but it persists.  On a hot day, driving very slowly, the engine coolant temperature goes up to 200 F, and the fan- I think- comes on about 220 F.  I have hardly ever heard it come on and I suppose I should check the fan operation with a direct connection to the battery.
Tooling around, the coolant runs about 200 or less.  What temp is normal?

I had similar code for RF wheel speed sensor. Was told by dealer that fix was to replace the bearing on that wheel as sensor was part of the assembly. Whatever they did fixed the ABS problem (or, at least, the ABS light). I also had a Fan 2 (not 1) control circuit code. That resulted in swapping the BCM and ECM out (3 times). I've also read and been told that many of these problems are related to bad grounds and to check grounding points (there are apparently 3-4 such contacts under the hood, maybe under the dashboard cowl). I would be a bit worried about the ABS although if a solid ground makes the problems disappear, good enough for me. My temp runs 220F. HTH and good luck!

[gudgeonpin]

That is all very good information- Thank you Patrick.
The grounding sounds very plausible. Since it is an aluminum body with powder coat....neither of those are very conductive. And several of the faults are open circuits or low voltage. The 1405 might be mismatched to a reference circuit?
Hmm, tomorrow's weather looks pretty nice. Now I have to decide whether to crawl around in the V or go for a motorcycle ride. I have to admit, the motorcycle is very appealing.

The ABS doesn't worry me too much- it is not functioning, but the brakes on the car are monsters. Still, best to attend to it.