Q: Ignition switch starting in section step. All accessories come on dash but the check engine light is not coming on.

asked by on

Ignition switch starting in second cycle and check engine not coming on dash

Hi, thanks for writing in. I am not completely sure how to interpret your question, so I will touch base on a few things hoping it will help you out. If I interpret correctly, your car takes two key cycles, (attempt to crank once then twice) before it will start. What I don’t know is if the motor cranks the first try or not. This is a key detail that dictates my answer. If it cranks but won’t start the first time, this is most likely a fuel supply issue. If it only cranks the second time, this is an electrical issue I would need to do direct testing to make sense of.

If you turn the key on, the check engine light along with all the dash warning indicators should turn on. This is what is known as a bulb test. This lets us know if any bulbs are burnt out on the dash. If the light is not on after startup, I am not surprised if the motor eventually runs and runs fine. The check engine lights primary responsibility is for emissions problems. If all the other lights light up but the check engine light, you have a problem with the PCM (powertrain control module).

Contrary to popular belief, PCM’s don’t fail very often. Before I condemn a PCM I do every test I can come up with to confirm its failure. This can be extensive, and I would expect it to be so with your CTS. If this is the case, I would expect your car will not start at all.

I recommend the following inspection to help you out: Car is hard to start inspection

Good luck!

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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
  1. Home
  2. Questions
  3. Ignition switch starting in section step. All accessories come on dash but the check engine light is not coming on.

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: When it rains hard right rear window goes down and sends car into limp mode. The trunk also leaks.

There are small bus computers in your vehicle that control multiple items throughout the car. There is a bus controller in each door on the car. It is possible that the door that is leaking water inside it is causing...

Q: Have a brand new battery and alternator but Car will not crank in the morning

Depending on whether or not the vehicle will turn over will determine what the next step should be. If the engine does not turn over, I would recommend checking all connections related to the battery and check to be sure...

Q: Rear passenger wheel gets very hot. Do you know what it could be?

You will need to lift the wheel off the ground and see if the wheel is able to turn freely. If it does not, then the wheel will need to be removed and the caliper bleeder screw opened to see...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...