The P0332 code is a generic OBD-II diagnostic trouble code that indicates a problem with the knock sensor circuit on a vehicle. The knock sensor is responsible for detecting abnormal engine vibrations or "knocking" that can occur if the air/fuel mixture is detonating prematurely in the combustion chamber. The knock sensor sends signals to the engine control module (ECM) to adjust the ignition timing and prevent engine damage.
When the ECM detects a voltage or signal deviation from the knock sensor circuit that is outside the expected range, it triggers the P0332 code and illuminates the Check Engine Light (CEL) on the vehicle's dashboard. This code is specific to cylinder 2 in a multi-cylinder engine.
Some common causes of the P0332 code include:
Faulty knock sensor: The sensor itself may be damaged or have a poor connection.
Wiring issues: Damaged wiring, loose connections, or corrosion in the knock sensor circuit can cause this code.
Engine mechanical problems: Issues like a worn-out engine, excessive carbon buildup, or incorrect spark plugs can lead to abnormal engine vibrations and trigger the code.
Faulty ECM: In rare cases, a malfunctioning ECM may mistakenly trigger the P0332 code.
I would do a fuel pressure test because lack of fuel can make it ping and cause the code. You can rent a fuel pressure gauge at the local auto parts store for cheap or free here is a guide to help.
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
The fuel pressure should be about 60 PSI
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Friday, June 23rd, 2023 AT 10:04 AM