Skip the auto shop - Our mechanics make house calls

Q: No crank no start no communication with BCM

asked by on

No crank no start replace ignition switch and lock cylinder, did relearn and still no crank

My car has 117592 miles.
My car has an automatic transmission.

A: Does your vehicle have power on the purple ...

Does your vehicle have power on the purple wire at the starter? If you have power on the purple wire during cranking you likely have a faulty starter. If you have no communication with the body control module (BCM), the most likely cause is a faulty BCM. These vehicles are known for having bad BCMs. Unfortunately the BCM will need to be setup with a factory scan tool. If you’d like, a certified YourMechanic technician can come to your home or place of business to help you perform a Car is not starting Inspection and diagnose this issue.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Driver side axle is leaking. Do I need to replace the axle and back struts before I get new tires and alignment?

Hello. Yes, I would recommend getting the axle seal, and the back struts replaced before having the alignment done and tires replaced. These two tasks will require having an alignment done after they have been replaced anyway, so it's less...

Q: EVAP Vent valve solenoid code p0449

This suggests you may have a bad EVAP control module. A battery voltage is supplied to the evaporative emission (EVAP) canister vent solenoid valve. The control module grounds the EVAP canister vent solenoid valve control circuit to close the valve...

Q: Where is the interior dome light fuse located

I did some research and found that the interior dome light is actually controlled by the fuse labeled CTS-PWR-LK. Forums are indicating that this is the number #35 fuse, but you can verify it by checking the fuse panel. If...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...