2000Impalaspeeder

I got this Code from my car, "43" Electronic Spark Control, circuit problems, I have no Idea what it means, I want to know what too do so I can get my Camaro back on the road, can someone help me??

rkuelbs

Just saw this post after I read your other one. If you're getting a DTC 43, you need to check the Knock Sensor first. The knock sensor is located on the side of the block, right above and in front of the starter motor.

Unplug the knock sensor and turn the key on. Using a voltmeter, check voltage between the knock sensor wire and ground, should get exactly 5 volts. If you have 0 volts, you have a bad PCM.

If you have 5V at the sensor wire, use an ammeter to check the knock sensor resistance. You should get 3300-4500 ohms between the knock sensor terminal and engine ground. If the resistance is out of range, replace the knock sensor. If the knock sensor resistance is within spec, then you will need to replace the ESC module located inside the PCM cover.

brandons99mc

I agree, but with that code a very common problem is a short, or sometimes having plugwires routed over the ECM/PCM harness, I know what ur gonna say, how in the... Well let's just say some people should really find other ways of amusing themselves and not work on their cars. Also, it's always a good idea to check your ground connections, especially the braided metal ground straps, the reason is the LT-1 is a very tempermental engine, it runs hard and strong when it gets things it's way, but have a single plug wire come loose, or develop a leaky intake manifold or even a cracked brake booster vacuum line and the engine can go from feelin racy to feelin like it's ready for the trash heap.