Last reported case: 9 months ago
Based on 3 owner reports, 3 from forums)
What is P0300?
P0300 indicates your engine is misfiring across multiple cylinders, which is a critical powertrain issue that can cause severe engine damage if ignored. This code triggers when the engine control module detects irregular combustion in several cylinders, often leading to rough running, power loss, and potential catalytic converter damage. Based on real data, this is most commonly reported in Honda Accord, Chevrolet Spark, and Ford Mustang models.
Common Causes:
- Faulty spark plugs or ignition coils (mentioned in multiple Spark and Accord cases)
- Head gasket failure (specifically mentioned in Honda Accord discussions)
- Fuel system issues like failing fuel pumps (referenced in Accord owner quotes)
- Worn engine components in high-mileage vehicles (seen in 130k+ mile Spark and 324k mile Accord examples)
Symptoms:
- Engine runs rough or shakes noticeably (implied in misfire descriptions)
- Loss of power or acceleration (mentioned in Mustang and Accord cases)
- Check engine light illumination with possible limp mode activation (specifically described in 2020 Accord case)
- Poor fuel economy and potential stalling (inferred from misfire behavior)
🚗P0300 on 2010 LEXUS RX
This page focuses specifically on P0300 issues reported by 2010 LEXUS RX owners. The experiences and fixes below are from real owners of this exact vehicle.
Symptoms Reported by 2010 LEXUS RX Owners:
Parts Often Involved:
What Owners Say
Real experiences from 2010 LEXUS RX owners
“1999 Lexus RX300 P0300 + All Ignitor Circuit Codes (P1300P1325) Need Advice I have a 1999 Lexus RX300 AWD, and I’m dealing with a flashing check engine light.”View original
“I have a 1999 Lexus RX300 AWD, and I’m dealing with a flashing check engine light. The trouble codes are P0300 (multiple cylinder misfire), along with P1300, P1305, P1310, P1315, P1320, and P1325, which all point to ignitor circuit malfunctions on every cylinder.”View original
“2010 RX350 P0300 code 3 months after new coils and plugs I have read posts on resolving the P0300 code, however, I think I have something else going on. 3 months ago I replaced all coils and plugs with original toyota parts.”View original
“I have moderate mechanical abilities and I am afraid to take it to a dealer who wont trust the work I did. I would Really appreciate anyone's help, Thanks.”View original
“2010 RX350 P0300 code 3 months after new coils and plugs Thanks Clutchless. now I can worry about the spark plugs😢. thank you all for the help!”View original
“Thanks Clutchless. now I can worry about the spark plugs😢. thank you all for the help!”View original
These are real experiences shared by 2010 LEXUS RX owners on automotive forums and communities. Results may vary based on vehicle condition and repair quality.
About This Data
This page aggregates 3 discussions about P0300 from 2010 LEXUS RX owners across automotive communities.
Success rate (0%) is calculated from posts where owners confirmed whether their fix resolved the issue.
Last updated: 5/18/2025