P033D OBD-II: Knock Sensor 4 Circuit High
P033D Severity
Will P033D go away on its own?
Once the vehicle's onboard system no longer detects the issue, most codes will disappear on their own. If your vehicle still has this code, however, it should be properly diagnosed to avoid a more serious problem.
For a proper diagnosis, RepairPal Certified shops have the equipment, tools, and expertise.
Moderate severity codes might not threaten the vehicle's safety or functionality immediately, but you should still get it diagnosed within a reasonable time frame to keep your car running well.
What causes OBD-II fault code P033D?
The knock sensor tells the engine control module (PCM) that the engine has an excessive vibration resulting from an incorrect fuel and air mixture. If the PCM does not receive a signal from the knock sensor, it will set code P033D. The check engine light may or may not be illuminated.
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OBD II Fault Code
- OBD II P033D
OBD-II Code Powertrain Control Module (PCM) failure is defined as a Knock Sensor 4 Circuit High
The knock sensor tells the engine control module (PCM) that the engine has an excessive vibration resulting from an incorrect fuel and air mixture. If the PCM does not receive a signal from the knock sensor, it will set code P033D. The check engine light may or may not be illuminated.
Common Problems That Trigger the P033D Code
- Knock sensor failure
- Powertrain Control Module (PCM) failure
- Wiring issue
Common Repairs Needed for the P033D Code
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