Code 43 - ESC/knock sensor

Code 43 can be set by improper timing. Check to make sure that your timing is correct. You might need to check to see if your balancer has slipped and the outer ring is showing the correct timing but it's off and therefore your "correct timing" isn't correct.

-Bruce

Most likely, the ECM is getting a continuous knock signal from the sensor, causing it to constantly retard the spark timing (a scan tool would help to verify this). The question is why - could it be picking up some other noise from the engine?

Robert,

Went on your web page and found it most useful, especially the OBD11 information.

Here is a sample for this newsgroup:

Anatomy of the DTC:

A DTC is made up of 5 digits.

Digit 1: B= Body, C= Chassis, P = Powertrain, U= Network

Digit 2: 0= SAE, 1= MFG

Digit 3: 1= Fuel and air metering, 2= Fuel and air metering (infector circuit, 3= Ignition systems or misfire, 4= Auxiliary emission controls, 5= Vehicle speed control and idle control system, 6= Computer output circuit, 7 and 8= Transmission

Digits 4 and 5: Fault (00-99)

Thanks Hank From PA....

Or stray voltage getting into the harness.