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My car does not start it has a code U0156 diahatsu siron 2008

It does not start the battery light does not lit up and the same for the check engine light

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  • sheikh Feb 14, 2012

    when i jump the relay the battery light would come then the car would start

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The standard description of Diagnostic Test Code (DTC) U0156 is "Lost Communication With Information Center "A"" This is a computer network fault. It could be due to a failed module or loss of power to the module. There may also be other faults in other parts of the system. If you are getting this code from the engine control module, the entire computer network in your vehicle needs to be tested/diagnosed. Many components can be affected by a single module that cannot communicate because several of the modules share the same data in order to make your vehicle function properly.

Posted on Feb 14, 2012

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SOURCE: check engine lit on code po442,po445

I have a dodge stratus and the engine light is on and it drives and its as though someone stopped it with a grabbing sensation but its not the brakes they are not involved. i thought the pause and cut off was caused by the transmission but it not that either

Posted on Mar 30, 2010

jgwhomeequip
  • 1902 Answers

SOURCE: MY CHECK ENGINE LIGHT CAME

Here is a link to the U0156 there is not a lot of information about the U0156. It is something to do with the ignition switch or some electrical running to the ignition switch.
http://www.aboutautomobile.com/TSB/2007/Cadillac/Escalade/Ignition+Switch

Causes A code P0420 may mean that one or more of the following has happened:

  • Leaded fuel was used where unleaded was called for
  • An oxygen sensor is not reading (functioning) properly
  • The engine coolant temperature sensor is not working properly
  • Damaged or leaking exhaust manifold / catalytic converter / exhaust pipe
  • Retarded spark timing
  • The oxygen sensors in front and behind the converter are reporting too similar of readings
Possible Solutions Some suggested steps for troubleshooting a P0420 error code include:
  • Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required.
  • Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform. The waveform of the sensor behind the converter should be more steady).
  • Inspect the downstream heated oxygen sensor (HO2), replace if necessary
  • Replace the catalytic converter
One thing to note is that many vehicle manufacturers offer a longer warranty on emissions-related parts. So if you have a newer car but it's out of it's bumper-to-bumper warranty, there still may be warranty on this type of problem. Many manufacturers give a five year, unlimited mileage warranty on these items. It's worth checking into.

Posted on Jun 26, 2011

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MY CHECK ENGINE LIGHT CAME ON AND I HAD THE AUTOPARTS CHECK IT THE CODES ARE ...U0156 AND.....P0420..... I KIND OF SMELL OIL BUT ..NO LEAK ..OR NO SMOKE.. I NEED YOUR HELP PLEASE THANK YOU


Here is a link to the U0156 there is not a lot of information about the U0156. It is something to do with the ignition switch or some electrical running to the ignition switch.
http://www.aboutautomobile.com/TSB/2007/Cadillac/Escalade/Ignition+Switch

Causes A code P0420 may mean that one or more of the following has happened:
  • Leaded fuel was used where unleaded was called for
  • An oxygen sensor is not reading (functioning) properly
  • The engine coolant temperature sensor is not working properly
  • Damaged or leaking exhaust manifold / catalytic converter / exhaust pipe
  • Retarded spark timing
  • The oxygen sensors in front and behind the converter are reporting too similar of readings
Possible Solutions Some suggested steps for troubleshooting a P0420 error code include:
  • Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required.
  • Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform. The waveform of the sensor behind the converter should be more steady).
  • Inspect the downstream heated oxygen sensor (HO2), replace if necessary
  • Replace the catalytic converter
One thing to note is that many vehicle manufacturers offer a longer warranty on emissions-related parts. So if you have a newer car but it's out of it's bumper-to-bumper warranty, there still may be warranty on this type of problem. Many manufacturers give a five year, unlimited mileage warranty on these items. It's worth checking into.

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