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2016 E350 4Matic wagon, 2019 Ford Expedition, 2019 Chevy Bolt EV
ugh, diag codes
had the COLLISION PREVENTION ASSIST PLUS INOPERATIVE warning on my dash repeatedly this evening. was first time driving the E350 in 3-4 weeks.
Drove fine, no symptoms other than that warning. Upon getting home, I ran the Launch CReader diagnostic and got a PILE of errors, mostly stored low voltage codes.
2016 E350 4Matic wagon, 2019 Ford Expedition, 2019 Chevy Bolt EV
ugh, the main battery is a fairly new AGM, too. ok, i stuck my NOCO Genius 10 charger on it overnight, tomorrow I'll clear the codes and try again. Thursday my wife wants her car to drive up to SF to the Opera with her 90 yr old opera buddy. I mean, I suppose she could take the Chevy Bolt EV if I charge it to 100% first, but they won't be half as comfortable as they would in the E350, plus its going to be raining pretty hard that day.
2016 E350 4Matic wagon, 2019 Ford Expedition, 2019 Chevy Bolt EV
silly question, if I hook my charger up to the terminals near the main batt, does that also charge the aux battery in back ? AFAIK, that aux batt is original, so 9 years old. its a Mercedes FIAMM, and AFAIK, Fiamm got out of the batt business years ago.
I always wonder.... why Coding ?......when I see weird DTC like CODING error, whenever un-planned voltage loss occured or in your case very low voltage. "7.Check codings in control unit ''S1 (Electronic ignition lock (EIS))''
ugh, the main battery is a fairly new AGM, too. ok, i stuck my NOCO Genius 10 charger on it overnight, tomorrow I'll clear the codes and try again.
Thursday my wife wants her car to drive up to SF to the Opera with her 90 yr old opera buddy. I mean, I suppose she could take the Chevy Bolt EV if I charge it to 100% first, but they won't be half as comfortable as they would in the E350, plus its going to be raining pretty hard that day.
Hard raining... you may want to test the rain drains.
You know how much batteries dislike being flattened... get warranty exchanged since it's fairly new.
I will gladly miss our annual rainy day while splurging on Asia tour.
Last edited by CaliBenzDriver; Nov 11, 2025 at 11:43 PM.
2016 E350 4Matic wagon, 2019 Ford Expedition, 2019 Chevy Bolt EV
Originally Posted by S-Prihadi
I always wonder.... why Coding ?......when I see weird DTC like CODING error, whenever un-planned voltage loss occured or in your case very low voltage. "7.Check codings in control unit ''S1 (Electronic ignition lock (EIS))''
thats a 'stored' code as opposed to 'current', and likely was a transient condition when the CU being diagnosed was under the low voltage and misbehaving.
2016 E350 4Matic wagon, 2019 Ford Expedition, 2019 Chevy Bolt EV
Originally Posted by CaliBenzDriver
Hard raining... you may want to test the rain drains (here).
You know how much batteries dislike being flattened... get warranty exchanged since it's fairly new.
the panoramic roof drains are still clear, the car is parked outside year around, and has never leaked.
after charging, I'll run by the battery store, and have them load test it. I think this one is a 'Duracell' branded East Penn batt, they've been pretty solid in the past. If the CCA reading is at all down from 'spec', I'll get a new one.
thats a 'stored' code as opposed to 'current', and likely was a transient condition when the CU being diagnosed was under the low voltage and misbehaving.
it's interesting to see how the whole string of networked modules disfunction in domino effect - Modules upset each other starting with... the sleepless F-SAM/CGW.
Last edited by CaliBenzDriver; Nov 11, 2025 at 11:52 PM.
I have this on my Audi TT because it doesn't get driven a lot. It's cool because it shows the current battery voltage whether it is "on" or "off". BUT, it is in the engine compartment and not hidden somewhere in the car. I have it attached to the negative terminal since that is the side you are supposed to disconnect first. For our cars, a trickle charger is probably easier if you are close to an electrical outlet.
It did (collision warning inoperative message) appear on my dash as well . I ignored it . After the very next engine start / stop , it just gone away for good . No message for more than 1 year
2016 E350 4Matic wagon, 2019 Ford Expedition, 2019 Chevy Bolt EV
ok, so charged battery overnight. fired up the Launch Creader Benz, and cleared the codes, then scanned again, its STILL got two ECM codes, the 'current' one kind of scares me.
P066500 (stored) "The actuation for the Switchover Valve of the Intake Manifold Cylinder Bank 2 Has a Short Circuit to Positive..."
P066300 (current)."The actuation for the Switchover Valve of the Intake Manifold Cylinder Bank 2 Has an electrical fault or an open circuit..."
I always wonder.... why Coding ?......when I see weird DTC like CODING error, whenever un-planned voltage loss occured or in your case very low voltage. "7.Check codings in control unit ''S1 (Electronic ignition lock (EIS))''
Because as you see in the report, the FCW is missing. More likely is missing from CAN as well. And EZS is coded with FCW and because it can't receive any handshake from FCW it ask for "coding", hoping that someone delete it from Variant Coding.
ok, so charged battery overnight. fired up the Launch Creader Benz, and cleared the codes, then scanned again, its STILL got two ECM codes, the 'current' one kind of scares me.
P066500 (stored) "The actuation for the Switchover Valve of the Intake Manifold Cylinder Bank 2 Has a Short Circuit to Positive..."
P066300 (current)."The actuation for the Switchover Valve of the Intake Manifold Cylinder Bank 2 Has an electrical fault or an open circuit..."
Some times ago you refused a Xentry diagnosis. Maybe is time to use Xentry for diag, as diag is the step by step tutorial for fixing the issue, Xentry is not just a Fault Code reader
ok, so charged battery overnight. fired up the Launch Creader Benz, and cleared the codes, then scanned again, its STILL got two ECM codes, the 'current' one kind of scares me.
P066500 (stored) "The actuation for the Switchover Valve of the Intake Manifold Cylinder Bank 2 Has a Short Circuit to Positive..."
P066300 (current)."The actuation for the Switchover Valve of the Intake Manifold Cylinder Bank 2 Has an electrical fault or an open circuit..."
You note these 2x transient faults (current + stored) are for the exact same electrical item.
There is a poor or non-connection of one of the plastic intake-plenum valve.
50% chance whomever had the plenum removed during maintenance work did not plug the connector back in.
> Visually inspect for open connectors.
This is not related to batteries getting drained.
Last edited by CaliBenzDriver; Nov 12, 2025 at 06:21 PM.
2016 E350 4Matic wagon, 2019 Ford Expedition, 2019 Chevy Bolt EV
Originally Posted by CaliBenzDriver
Max is a great way to get this done painlessly.
yeah, I don't want to have to pull off the plastic beyond the front snap-off piece to figure out whats going on here. 10 or 20 years ago, sure, I'd be in there with my wrenches and meters... but I'm 71 now and not as sharp as I was.
yeah, I don't want to have to pull off the plastic beyond the front snap-off piece to figure out whats going on here. 10 or 20 years ago, sure, I'd be in there with my wrenches and meters... but I'm 71 now and not as sharp as I was.
you can help Max by telling him what you want to focus on.
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, sometime I worry about this when car un-used too long.
