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Service code 43 sensor engine - 1992 Buick Regal

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Code 43 is ....Electronic Spark Control (ESC) Circuit

Posted on Oct 12, 2013

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91 3.1 car starts and runs fora minute then dies code 43 came up( fixed wire kn Sen.) now 21and 43 came up?


You didn't say what the make and model are, but if code 43 is a knock sensor issue I guess its a GM product.
Code 21 means the TPS voltage was too high, and code 43 means the knock sensor voltage was too high or too low.
Neither code would kill the engine. Just turn the warning light on.
If the throttle position sensor failed, you would get the effect of stalling on acceleration.
You may need to narrow down the possible causes to spark or fuel, and in the end it could be the engine computer. It could also be a relay or other electrical component.

Apr 08, 2016 | Cars & Trucks

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I have A 1993 Chevy Cheyenne K1500 4by4 with a 6cyl. Trouble code 43 ,which is my knock sensor.. I disconnected the battery and replaced it , but the service engine soon light still comes on, I checked...


I have read your problem, you can easily get the solution of your problem from toolsnyou site. I was also facing a problem like this. They help me a lot by providing service manuals. Do visit it once. http://toolsnyou.com/

Sep 12, 2017 | Cars & Trucks

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1997 breeze is shooting codes 12 46 43 55


OBD Code 12 - No Distributor Reference Pulse (Diagnostic Test Active) The Engine Control Module-ECM uses the distributor reference pulse to calculate the engine speed. On newer engines, the Crank Shaft Position Sensor performs this function.

Symptoms:
  • When flashing the Check Engine Light to read codes, code 12 will always display first, indicating the diagnostic system is active
  • The engine will not run with a "hard" code 12 set
Common Problems:
  • Chances are you will never need to diagnose a code 12. Rather, the problem would be a crank, no-start condition.
  • If code 12 does not flash, that would indicate a communication problem with the ECM.
  • Code 12 does not show when reading codes with a scan tool. If there is a communication problem, the scan tool will let you know.



OBD Code 46 - Pass-Key II System Error - Circuit out of Frequency Range The ECM receives a signal from the Pass-Key module. When the correct signal is received, the ECM will allow the engine to start and run. Please review the RepairPal article on the GM Pass-Key Anti-theft systems for more information.

Symptoms:
  • Engine may not start
Common Problems:
  • Faulty ignition lock cylinder



OBD Code 43 - Knock Sensor error The ECM receives a signal from the Knock Sensor based on the amount of engine ping detected. The ECM uses information from this sensor to help calculate fuel delivery and spark timing.

Symptoms:
  • Engine ping
  • Lack of power
Common Problems:
  • Faulty Knock sensor
  • Poor connection at Knock sensor


OBD Code 55 - End Test.


Hope ehit help (remember comment and rated this).

Jul 22, 2010 | 1997 Plymouth Breeze

1 Answer

Jeep Grand Cherokee 1997. Getting check engine light signal 12 14 43 55. Car symptoms are stalling rough idle.


Code 12 = Recently disconnected battery

Code 14 = Coolant sensor high resistance or shorted

Code 43 = Knock sensor or Electronic spark control circuit fault

Code 55 End read code.

Hope helps (remember rated this).

Jun 12, 2010 | 1997 Jeep Cherokee

1 Answer

1990 grand prix 3.1 computer code 43


engine code 43 - electronic spart timing problem- possible knock sensor problem.. check for 5v at knock sensor wire.. if it has 5v then probably need a knock sensor.

Apr 12, 2010 | 1990 Pontiac Grand Prix

1 Answer

Code 43


Should clearify by providing engine info. However, this will likely be what you need...

Code 43:
knock sensor or electronic spark control circuit fault

Jun 25, 2009 | 1994 Chevrolet C1500

1 Answer

Engine code 43 lights up engine has spark knock repaced esc module knock sensor tuned it up it runs rich and has the spark knock isssue


code 43 throttle position sensor out of adjustment.not working.if you replace knock sensor and it still spark knocking.make sure the wire connector is not broken.go to higher octane gas .make sure engine timing is correct. also make egr valve is opening when it suppose to it will cause detonation.you will need a scanner to check tps and egr valve.

Jun 17, 2009 | 1992 Chevrolet K1500

1 Answer

1993 full size blaser 5.7 code 43


Check for a 5 volt reference signal at the wiring to the knock sensor. With key on engine off one of the wires to the sensor should have 5 volts.

Dec 26, 2008 | 1993 Chevrolet S-10 Blazer

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