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Discussion Starter #1
Hi everyone. First of all, my car is an Astra GTC 2.0biTurbo 2014.
I recently bought this car from a dealership, initially when i saw the car, the engine failed to start on the first attempt, second attempt all good, did the test drive and everything was how it should be, smooth ride and plenty of power. But i was concerned about the fact that it didn't start on the first attempt, therefore the guy who owns the dealership called his mechanic to look at it and he said that the crankshaft sensor has to be replaced, unfortunately they couldn't get the part that day so he dropped the price for me and i decided that i will fix it myself. I send the car to a service, i haven't told them about the cranckshaft sensor just because i got warranty on it so i thought if something else is wrong than i won't have to pay for it. Anyway, they run a diagnose on it and they got this error code P0513 and they said that the fault came from the car key, and they advise me to use my spare key for a week to see if it's the same or not. I did what they said, same problem, if I'm not using the car for approx 8h it won't start on the first attempt. So i decided to go back and use the main key and now the problem seems to get a bit worst as if I'm not using the car for more than 7-8 hours it gets quite hard to even unlock the car. I got the car booked in for next week again so they can do further investigation. Meanwhile i will appreciate if any of you have any clue on what the problem can be, is it the key or it really is the crankshaft sensor or maybe something else?! Thank you.
PS: apologize for any grammar mistakes, English is not my first language 😂
 

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Here's the diagnostic for it

DTC P0513 Immobilizer Key Incorrect

Circuit/System Description
The body control module (BCM) sends the pre–release information to the engine control module (ECM) via the serial data circuit.
The ECM then sends a challenge to the BCM. Both the ECM and BCM perform a calculation on this challenge.
If the calculated response from the BCM equals the calculation performed by the ECM, the ECM will allow vehicle starting.
Conditions for Setting the DTC
The calculated response from the BCM does not equal the calculation performed by the ECM
Diagnostic Aids
DTC P0513 may be caused by a loose connection or intermittent poor continuity on the ECM ground or at the negative battery cable.
Be sure to check the ECM ground(s) and negative battery cable if normal system diagnosis does not correct the concern.
Circuit/System Verification
1. Verify there are no immobilizer DTCs set in the K9 Body Control Module.
⇒ If any immobilizer DTCs are set in the K9 Body Control Module
Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
⇓ If no immobilizer DTCs are set in the K9 Body Control Module
2. Perform the K9 Body Control Module immobilizer learn using the body control module IMMO Function with Existing Transponder or Remote Key in SPS.
Refer to Immobilizer System Component Programming .
3. Verify the engine starts after the K9 Body Control Module completes the learn procedure.
⇒ If the engine does not start
Perform the K20 Engine Control Module immobilizer learn using the engine control
module IMMO Learn in SPS.
Refer to Immobilizer System Component Programming .
⇓ If the engine starts
4. All OK.
 

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Discussion Starter #3
Here's the diagnostic for it

DTC P0513 Immobilizer Key Incorrect

Circuit/System Description
The body control module (BCM) sends the pre–release information to the engine control module (ECM) via the serial data circuit.
The ECM then sends a challenge to the BCM. Both the ECM and BCM perform a calculation on this challenge.
If the calculated response from the BCM equals the calculation performed by the ECM, the ECM will allow vehicle starting.
Conditions for Setting the DTC
The calculated response from the BCM does not equal the calculation performed by the ECM
Diagnostic Aids
DTC P0513 may be caused by a loose connection or intermittent poor continuity on the ECM ground or at the negative battery cable.
Be sure to check the ECM ground(s) and negative battery cable if normal system diagnosis does not correct the concern.
Circuit/System Verification
1. Verify there are no immobilizer DTCs set in the K9 Body Control Module.
⇒ If any immobilizer DTCs are set in the K9 Body Control Module
Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
⇓ If no immobilizer DTCs are set in the K9 Body Control Module
2. Perform the K9 Body Control Module immobilizer learn using the body control module IMMO Function with Existing Transponder or Remote Key in SPS.
Refer to Immobilizer System Component Programming .
3. Verify the engine starts after the K9 Body Control Module completes the learn procedure.
⇒ If the engine does not start
Perform the K20 Engine Control Module immobilizer learn using the engine control
module IMMO Learn in SPS.
Refer to Immobilizer System Component Programming .
⇓ If the engine starts
4. All OK.
I much appreciate your help but i can't really understand much to be honest, i was hoping that all this procedure would be done by that service who diagnosed my car, but all they did was asking me to use my spare key. I did some research regarding that code, but idk, nothing is really clear to me... Anyway, i will wait till next week when the car goes back in service, hopefully they will actually do something this time. Again, thanks for your answer, appreciate it.
 

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If it was a Vx dealer they have access to the same diagnostic path as i posted,
it may turn out to be something as simple as a bad earth,but of course it does actually have to be checked by them rather than guessing at the problem,good luck with it (y)
 

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I much appreciate your help but i can't really understand much to be honest, i was hoping that all this procedure would be done by that service who diagnosed my car, but all they did was asking me to use my spare key. I did some research regarding that code, but idk, nothing is really clear to me... Anyway, i will wait till next week when the car goes back in service, hopefully they will actually do something this time. Again, thanks for your answer, appreciate it.
Show the garage what has been posted on your thread. Hopefully they will check the ground points and wiring concerned and reprogram both keys. What garage is it?
 

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Discussion Starter #6
The closest Vx garage is 20 miles from me, so i took the car to EAC garage. They are pretty good and professional but like you said, a Vx garage would be much better. I will se if they can do something next week if not then i will take it to Vx. I'm gonna tell them about your advice too, maybe they will accept it and look at it. Cheers, mate!
 

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Discussion Starter #7
Quick update after today's service,the car has been fixed. It turned out it had a faulty battery, replaced that they run a diagnose again and the previous fault didn't came up again so all good, massive improvement too when i start the car, feels like new 😁 Thank you everyone for your advices and help. Cheers!
 
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