Question about 1993 Chevrolet K1500

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Intermittent long crank times hot or cold service lamp on intermi

On a 1993 Chevy K1500 5.7L OBD had code 43. We replaced the knock sensor and plug to it. At time lamp is out and starts fine others it will crank a lot before start and lamp comes on

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  • carhob May 11, 2010

    is it still same code?



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Code 43 has different meanings.It has to do with the knock sensor, electronic spark timing failure, left O2 sensor failure, and equate code 42a. Ithink that has to do with ignition switch failure. Good luck.

Posted on May 03, 2009


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1 Answer

Have a code 43

Rob: According to "low voltage at ecm terminal l (on carbureted models)
43- knock sensor circuit"

May 17, 2015 | Cars & Trucks

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Ok had the codes come up for both crank sensors on our Pontiac Montana and knock sensor, replaced all three sensors cleared codes and the check engine light keeps coming back on after clearing codes, for...

I guess you do not know that OBD Codes have
nothing to do with replacing parts

The Codes are used along with the diagnostic
info & charts to check the system that set the codes

Only component testing will find a problem

You used the name of a codes to replace a part
with a similar name

I would guess you did no testing & have no idea why the
fault codes were set, so you found no problem, thus you
fixed nothing & the MIL Lamp is still on

You Cleared ALL DATA needed to help diagnose the issues

You lost your codes & freeze frame data at the time the codes
were set & your lost your emission monitor data

Now you get your codes & write them down
Google the codes & study the possible cause
& solutions

TYPE: OBD & your codes

Need to study OBD Vehicle Systems

Oct 16, 2014 | Cars & Trucks

1 Answer

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.

Sep 12, 2017 | Cars & Trucks

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Occasional stalling at very low speeds with no warning. Sometimes it stalls after driving less than a mile so it doesn't seem heat related. Occasional no start. Starter does crank though. It...

code 17 is camshaft sensor error. a failed camshaft position sensor will show up in a number of ways. The worst-case scenario is that there is no spark in the combustion chamber. Other symptoms related to the position sensor can include excessively long cranking time when starting cold, rough running on an intermittent basis, poor idle, stumbling or hesitation, a drop in mileage and stalling upon acceleration. code 17 is for OBD-I system 1995 and before, OBD-II system 1996 and up. these symtoms can also be caused by bad wiring to sensor. good-day !!

Jul 13, 2011 | Buick LeSabre Cars & Trucks

1 Answer

I have a 2004 pilot, VTS4 and engine light came on. i have a p0325 knock sensor circ. bank A. just replace the sensor?? also i can seem to find any diagrams. any help appreciated!!!

It does sound like the sensor may be bad, but you also need to check the wiring.
This information comes from:

P0325 OBD-II Trouble Code Technical Description

Knock Sensor Circuit Malfunction
What does that mean?

A knock sensor tells the engine computer when one or more of your engine's cylinders are "knocking", that is, exploding the air/fuel mixture in a way that delivers less power and can be damaging to the engine if prolonged. The computer uses this information to tune the engine so that it doesn't knock. If your knock sensor wasn't operating properly, so that it was always indicating a knock, the engine computer's response may have been to change the ignition timing on your engine. Knock sensors generally bolt into or thread into the engine block. This P0325 code may show up intermittently or the Service Engine light may be lit constantly. Other knock sensor related DTC codes include P0330.
FB.init("dd7d9e9681341cde77587bc6a2029f6f"); on Facebook Symptoms

You may notice drivability problems including a lack of power and perhaps some hesitation. There may also be other symptoms.

A code P0325 most likely means one or more of the following has happened:

Possible Solutions
  • Check the resistance of the knock sensor (compare it to factory specs)
  • Check for broken/frayed wires leading to the sensor
  • Replace the knock sensor

Mar 02, 2011 | Honda Pilot Cars & Trucks

2 Answers

I have two codes coming up,they are 1-2 and 4-3

I don't think you have the OBD system yet in that vehicle . the 1-2 is a code 12 and should have flashed 3 times. 12 means the computer is working to give you codes. The 4-3 means code 43 and that should be:
  • ESC circuit
  • knock sensor signal
I hope this helped and good luck.

Feb 06, 2011 | 1990 Oldsmobile Cutlass Ciera

1 Answer

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.

  • 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.

  • 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.

  • 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

2 Answers

Trouble code 43. 1993 C 1500 5.7 automatic

code p0043 is the heater circuit on bank 1 sensor 3.

This should not give you a drivability issue. Its the 02 sensor after the cat. When you get a heater code it always 99% of the time points to a burnt out heating element just like a house dryer does.

Jan 28, 2010 | 1996 Chevrolet C1500

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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