flashing CEL wont crank or start obd2 reads fail?
06-24-2020, 06:41 AM
#1
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Join Date: 06-02-2020
Location: Morris, IL
Posts: 20
flashing CEL wont crank or start obd2 reads fail?
I need help family. i have a 09 hhr ss and on Father's day it started to run funny misfiring. I thought it could be a fuel pump(idk why?) but I swapped that thinking it could be. i was clearly wrong but i hooked up my obd2 bosch scanner to it and it read error cannot communicate? cel is flickering rapidly and ignition is allowing key to turn freely just no spark and engine wont turn over ?
did i fry my ecu? IO need help to fix my daily as its my only vehicle.
did i fry my ecu? IO need help to fix my daily as its my only vehicle.
06-24-2020, 08:02 AM
#2
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Join Date: 10-13-2011
Location: Welland,Ont Canada
Posts: 37,606
You changed the intank electric fuel pump or the HPFP under the hood?
Check fuse box , red wire in front left of it is the power wire from battery to fuse panel then to starter.
check maxi fuse in spare tire well near the battery.
Check fuse box , red wire in front left of it is the power wire from battery to fuse panel then to starter.
check maxi fuse in spare tire well near the battery.
06-24-2020, 08:26 AM
#5
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Join Date: 12-06-2009
Location: Alabama
Posts: 11,365
The fuse that goes to the cigarette lighter/power outlet also powers the OBD connection. Check that fuse (#29 I think) in the engine compartment fuse box.
FYI. Your SS has 2 fuel pumps. The supply pump in the tank and the High Pressure mechanical pump (HPFP) that is on the engine.
FYI. Your SS has 2 fuel pumps. The supply pump in the tank and the High Pressure mechanical pump (HPFP) that is on the engine.
06-24-2020, 08:33 AM
#7
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Join Date: 01-23-2009
Location: Fredericksburg,VA
Posts: 25,325
Has the ignition recall been done? Link to check recall status
What did you do that might have fried the ECM? Did you cause an arc with jumper cables?
"Failure to communicate" may mean the cig lighter fuse is blown. Fuse #29 underhood fuse box. Or a bad Paul Newman joke about hard boiled eggs.
Could be one of the relays or fuses.
What did you do that might have fried the ECM? Did you cause an arc with jumper cables?
"Failure to communicate" may mean the cig lighter fuse is blown. Fuse #29 underhood fuse box. Or a bad Paul Newman joke about hard boiled eggs.
Could be one of the relays or fuses.
06-24-2020, 08:35 AM
#8
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Join Date: 12-06-2009
Location: Alabama
Posts: 11,365
Apparently you don't understand car electronics. You say ECU but that is just one of many computers or modules that are on the car. And it's technically an ECM.
Like I stated, you can not connect a scanner or code reader if the OBD port doesn't have power to it. Check fuse #29.
Like I stated, you can not connect a scanner or code reader if the OBD port doesn't have power to it. Check fuse #29.