LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2020 >> UX 200 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 20 (Engine Control System (SFI) (M20A-FXS) - Diagnostic Codes (2 Of 6) (Hybrid)) >> SFI System >> DTC P0300-00: Random/Multiple Cylinder Misfire Detected; DTC P030027: Random/Multiple Cylinder Misfire Detected (Emission) Signal Rate of Change Above Threshold; DTC P030085: Random / Multiple Cylinder Misfire Detected (Over Temperature) Signal Above Allowable Range; DTC P030100: Cylinder 1 Misfire Detected; DTC P030200: Cylinder 2 Misfire Detected; DTC P030300: Cylinder 3 Misfire Detected; DTC P030400: Cylinder 4 Misfire Detected [10/2018 - 08/2021] >> Monitor Result

Monitor Result

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus UX 250h, 2023 Lexus UX 250h, 2022 Lexus UX 250h, 2021 Lexus UX 250h, and 2020 Lexus UX 250h. However, it is still accessible from the selected car via links, so may be relevant.

Refer to detailed information in Checking Monitor Status.

Refer to CHECKING MONITOR STATUS [10/2018 - ]

P0300: MISFIRE / EWMA MISFIRE

Monitor ID Test ID Scaling Unit Description
$A1 $0B Multiply by 1 Count Total EWMA* misfire count of all cylinders in last ten driving cycles
P0300: MISFIRE / MISFIRE RATE

Monitor ID Test ID Scaling Unit Description
$A1 $0C Multiply by 1 Count
  • When power switch on (IG), total misfire count of all cylinders in last driving cycle is displayed.
  • While engine is running, total misfire count of all cylinders in current driving cycle is displayed.
P0301: MISFIRE / EWMA MISFIRE1

Monitor ID Test ID Scaling Unit Description
$A2 $0B Multiply by 1 Count Total EWMA* misfire count of cylinder 1 in last ten driving cycles
P0301: MISFIRE / MISFIRE RATE1

Monitor ID Test ID Scaling Unit Description
$A2 $0C Multiply by 1 Count
  • When power switch on (IG), total misfire count of cylinder 1 in last driving cycle is displayed.
  • While engine is running, total misfire count of cylinder 1 in current driving cycle is displayed.
P0302: MISFIRE / EWMA MISFIRE2

Monitor ID Test ID Scaling Unit Description
$A3 $0B Multiply by 1 Count Total EWMA* misfire count of cylinder 2 in last ten driving cycles
P0302: MISFIRE / MISFIRE RATE2

Monitor ID Test ID Scaling Unit Description
$A3 $0C Multiply by 1 Count
  • When power switch on (IG), total misfire count of cylinder 2 in last driving cycle is displayed.
  • While engine is running, total misfire count of cylinder 2 in current driving cycle is displayed.
P0303: MISFIRE / EWMA MISFIRE3

Monitor ID Test ID Scaling Unit Description
$A4 $0B Multiply by 1 Count Total EWMA* misfire count of cylinder 3 in last ten driving cycles
P0303: MISFIRE / MISFIRE RATE3

Monitor ID Test ID Scaling Unit Description
$A4 $0C Multiply by 1 Count
  • When power switch on (IG), total misfire count of cylinder 3 in last driving cycle is displayed.
  • While engine is running, total misfire count of cylinder 3 in current driving cycle is displayed.
P0304: MISFIRE / EWMA MISFIRE4

Monitor ID Test ID Scaling Unit Description
$A5 $0B Multiply by 1 Count Total EWMA* misfire count of cylinder 4 in last ten driving cycles
P0304: MISFIRE / MISFIRE RATE4

Monitor ID Test ID Scaling Unit Description
$A5 $0C Multiply by 1 Count
  • When power switch on (IG), total misfire count of cylinder 4 in last driving cycle is displayed.
  • While engine is running, total misfire count of cylinder 4 in current driving cycle is displayed.

HINT: 

*: EWMA (Exponential Weighted Moving Average) misfire counts for last 10 driving cycles (calculated) Calculation: 0.1 x (current counts) + 0.9 x (previous average)

Initial value for (previous average) = 0