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04-30-2019
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#1 |
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Join Date: May 2018
Location: Nanaimo BC
Posts: 61
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Code 41 = new ECM?
Ok. Washed the car the other day and when I started it after it was idling really high about 2000 rpm and didn't have any power. The fan comes on right when I turn the key even before the engine is started. The ccm code on the Speedo says 41 both current and stored, even after clearing. I can got no ECM codes (by grounding A and B) the light in the DIC doesn't even light up. Code 41 means a loss of communication between the ECM and the CCM
My question is will the car still run fine with a good ECM and a bad link between the CCM or is my ECM fubar? |
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04-30-2019
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#2 | |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,685
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Re: Code 41 = new ECM?
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I would pull BATT neg. then see about re-seating the prom in the ECM. |
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04-30-2019
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#3 |
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Join Date: May 2018
Location: Nanaimo BC
Posts: 61
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Re: Code 41 = new ECM?
Battery reconnect did nothing. I'll try the prom next
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04-30-2019
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#4 |
 
Join Date: Dec 2007
Location: NYC
Posts: 1,187
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Re: Code 41 = new ECM?
Sounds like you wet something.
__________________
90 Chevy ZR1 LPE #2315 'SOLD' 90 Chevy ZR1 LPE #2774 'SOLD' 91 Chevy ZR1 Callaway aerobody 91 Chevy ZR1 #1512 91 Chevy ZR1 #951 95 Chevy ZR1 #338 'SOLD' 91 BMW 850i 94 BMW 850csi 95 BMW 850csi 94 Lotus Esprit S4 07 Benz CLS550 06 BMW M5 "SOLD" |
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04-30-2019
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#5 |
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Join Date: May 2018
Location: Nanaimo BC
Posts: 61
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Re: Code 41 = new ECM?
Yeah, my pants when I thought of what it'll cost to replace, let alone even finding one!
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04-30-2019
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#6 |
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Join Date: Dec 2007
Location: NYC
Posts: 1,187
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Re: Code 41 = new ECM?
__________________
90 Chevy ZR1 LPE #2315 'SOLD' 90 Chevy ZR1 LPE #2774 'SOLD' 91 Chevy ZR1 Callaway aerobody 91 Chevy ZR1 #1512 91 Chevy ZR1 #951 95 Chevy ZR1 #338 'SOLD' 91 BMW 850i 94 BMW 850csi 95 BMW 850csi 94 Lotus Esprit S4 07 Benz CLS550 06 BMW M5 "SOLD" |
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04-30-2019
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#7 |
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Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,843
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Re: Code 41 = new ECM?
Worst case Haibeck can have it rebuilt. I seriously doubt that’s the issue though. Did you wash the engine? In this case its more likely a connector somewhere.
H 
Last edited by Ccmano; 04-30-2019 at 12:07 PM. |
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04-30-2019
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#8 |
 
Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,156
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Re: Code 41 = new ECM?
reseat the connectors on the ECM, there was someone here who had that issue with bad pin connection to the ECM..
__________________
1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Shelby Series 1 - Wilwood Brakes Custom Interior NCM Lifetime Member #978 |
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04-30-2019
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#9 | |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,685
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Re: Code 41 = new ECM?
Quote:
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04-30-2019
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#10 |
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Join Date: May 2018
Location: Nanaimo BC
Posts: 61
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Re: Code 41 = new ECM?
Ok. So after sitting over night and reseating the PROM and 4 connectors to the ECM, it seems to be talking with the CCM again. No more CCM code 41 and "Err" at number 4.
The fan stays off with the engine off now, but when starting there is still a high idle and now the check engine light comes on, which it wasn't doing before. The CCM gives a c12 code, but the ECM gives a code 14 "coolant sensor high temp" and a 41 "cylinder select error" When I erase these codes and start the car it sounds fine for about a couple seconds the the check engine light comes on and the idle increases and it shows the same 2 codes. Any suggestions? |
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