Hi there. New Cherokee Owner (had a 1995 Wrangler for many, many years) but recently bought a 2003 Grand Cherokee. 4.7L HO. I received the following codes and am looking for some guidance on how to repair.
CODE 307: Cylinder #7 Misfire
CODE 325: Knock Sensor #1 Circuit Knock sensor (#1) signal above or below minimum acceptable threshold voltage at particular engine speed.
CODE 523: Oil Pressure Voltage Too High Oil pressure sending unit (sensor) voltage input above the maximum acceptable voltage
Would replacing the plugs and coil fix all of these? Open to suggestions. Thanks!
CODE 307: Cylinder #7 Misfire
CODE 325: Knock Sensor #1 Circuit Knock sensor (#1) signal above or below minimum acceptable threshold voltage at particular engine speed.
CODE 523: Oil Pressure Voltage Too High Oil pressure sending unit (sensor) voltage input above the maximum acceptable voltage
Would replacing the plugs and coil fix all of these? Open to suggestions. Thanks!
RockyMtn96XJ
CF Veteran
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Sep 23, 2025
- Join DateAug 2019
- LocationLittleton, CO
- Posts:1,467
- Year'96
- ModelCherokee (XJ)
- Engine4.0 HO
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