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Lexus RX

Fuel parameters

The Lexus RX has 10 fuel parameters.

● Confirmed◆ In testing○ Supported× Not supported

How to read a parameter card

Fuel level RX_FLIConfirmed

Pelican can show this parameter as the fuel tank level.

  • Request22 1F 2F
  • Service 22DID 1F2F
  • Module700 → 708
  • Every30 s
  • Testing for 1999 to 2019, 2021, 2023 to 2026

Example reply from a 2022 Lexus RX.

Bits 0 to 7 of the reply, 8 bits.

0xE0 = 224 → (224 × 100 ÷ 255) = 87.843137 %

Formula
(val × 100 ÷ 255)
Range
0 to 100 %
Unit
%

Confirmed for 2020, 2022. In testing for 2016, 2018 to 2019, 2021, 2023 to 2024. Not supported for 2005 to 2006, 2010, 2013, 2015, 2017, 2025 to 2026.

  1. The parameter's name and its ID in the OBDb. Confirmed shows when a response from a real car confirms the parameter.
  2. The clutch mark shows a Connectable, a parameter that Pelican surfaces in its interface.
  3. The service and PID/DID asked for, the control module it's sent to, and how often Pelican asks.
  4. The reply's bytes. The parameter's bytes are blue. Bytes for other parameters in the same reply are grayed out. Hover over a byte to see the parameter it represents.
  5. Where the parameter is in the response, and how Pelican converts the raw value into a value.
  6. A real reply, decoded. The raw value comes first, then the reading.
  7. Which model years have tested this parameter.

Fuel level RX_FLIConfirmed

Pelican can show this parameter as the fuel tank level.

  • Request22 1F 2F
  • Service 22DID 1F2F
  • Module700 → 708
  • Every30 s
  • Testing for 1999 to 2019, 2021, 2023 to 2026

Example reply from a 2022 Lexus RX.

Bits 0 to 7 of the reply, 8 bits.

0xE0 = 224 → (224 × 100 ÷ 255) = 87.843137 %

Formula
(val × 100 ÷ 255)
Range
0 to 100 %
Unit
%

Confirmed for 2020, 2022. In testing for 2016, 2018 to 2019, 2021, 2023 to 2024. Not supported for 2005 to 2006, 2010, 2013, 2015, 2017, 2025 to 2026.

Fuel pump duty ratio RX_FP_DUTY_RATIOConfirmed

  • Request22 10 6A
  • Service 22DID 106A
  • Module700 → 708
  • Every1 s
  • Testing for 1999 to 2016, 2018 to 2019, 2021, 2023 to 2024

Example reply from a 2026 Lexus RX.

Bits 0 to 15 of the reply, 16 bits.

0x01EC = 492 → (492 × 0.0609756098) = 30 kPa

Formula
(val × 0.0609756098)
Range
0 to 3996.036585 kPa
Unit
kPa

Confirmed for 2017, 2020, 2022, 2025 to 2026. In testing for 2016, 2018 to 2019, 2021, 2023 to 2024. Not supported for 2002, 2005 to 2006, 2008, 2010, 2013, 2015.

Fuel system 1 status FUELSYS1SAE J1979Confirmed

  • Request01 03
  • Service 01PID 03
  • Module7E0 → 7E8
  • Every250 ms

Bits 0 to 7 of the reply, 8 bits.

Unit
Named states
States
Raw valueStateMeaning
0OFFEngine is off
1OLOpen loop - has not yet satisfied conditions to go closed loop
2CLClosed loop - using oxygen sensor(s) as feedback for fuel control
4OL-DriveOpen loop due to driving conditions (e.g. power enrichment, deceleration enleanment)
8OL-FaultOpen loop - due to detected system fault
16CL-FaultClosed loop, but fault with at least one oxygen sensor - may be using single oxygen sensor for fuel control
32OL B2Open loop - has not yet satisfied conditions to go closed loop (Bank 2)
64OL-Drive B2Open loop due to driving conditions (Bank 2) (e.g. power enrichment, deceleration enleanment, cylinder deactivation)
128OL-Fault B2Open loop - due to detected system fault (Bank 2)

Confirmed for 2006. Supported for 2008, 2010, 2013, 2015 to 2017, 2020, 2022 to 2023, 2025 to 2026.

Fuel system 2 status FUELSYS2SAE J1979Confirmed

  • Request01 03
  • Service 01PID 03
  • Module7E0 → 7E8
  • Every250 ms

Bits 8 to 15 of the reply, 8 bits.

Unit
Named states
States
Raw valueStateMeaning
0OFFEngine is off
1OLOpen loop - has not yet satisfied conditions to go closed loop
2CLClosed loop - using oxygen sensor(s) as feedback for fuel control
4OL-DriveOpen loop due to driving conditions (e.g. power enrichment, deceleration enleanment)
8OL-FaultOpen loop - due to detected system fault
16CL-FaultClosed loop, but fault with at least one oxygen sensor - may be using single oxygen sensor for fuel control
32OL B2Open loop - has not yet satisfied conditions to go closed loop (Bank 2)
64OL-Drive B2Open loop due to driving conditions (Bank 2) (e.g. power enrichment, deceleration enleanment, cylinder deactivation)
128OL-Fault B2Open loop - due to detected system fault (Bank 2)

Confirmed for 2006. Supported for 2008, 2010, 2013, 2015 to 2017, 2020, 2022 to 2023, 2025 to 2026.

High fuel pressure, actual RX_HFP_ACTUALConfirmed

  • Request22 1F 6D
  • Service 22DID 1F6D
  • Module700 → 708
  • Every1 s
  • Testing for 1999 to 2016, 2018 to 2019, 2021, 2023 to 2024

Example reply from a 2026 Lexus RX.

Bits 24 to 39 of the reply, 16 bits.

0x0199 = 409 → (409 × 10) = 4,090 kPa

Formula
(val × 10)
Range
0 to 655350 kPa
Unit
kPa

Confirmed for 2017, 2020, 2022, 2025 to 2026. In testing for 2016, 2018 to 2019, 2021, 2023 to 2024. Not supported for 2002, 2005 to 2006, 2008, 2010, 2013, 2015.

High fuel pressure, target RX_HFP_TARGETConfirmed

  • Request22 1F 6D
  • Service 22DID 1F6D
  • Module700 → 708
  • Every1 s
  • Testing for 1999 to 2016, 2018 to 2019, 2021, 2023 to 2024

Example reply from a 2026 Lexus RX.

Bits 8 to 23 of the reply, 16 bits.

0x0190 = 400 → (400 × 10) = 4,000 kPa

Formula
(val × 10)
Range
0 to 655350 kPa
Unit
kPa

Confirmed for 2017, 2020, 2022, 2025 to 2026. In testing for 2016, 2018 to 2019, 2021, 2023 to 2024. Not supported for 2002, 2005 to 2006, 2008, 2010, 2013, 2015.

Immobilizer fuel cut RX_IMMOB_FUEL_CUTConfirmed

  • Request21 51
  • Service 21PID 51
  • Module7E0 → 7E8
  • Every1 s
  • Testing for 1999 to 2012, 2014, 2016 to 2026

Example reply from a 2015 Lexus RX.

Bit 32 of the reply.

0b0 = 0 → 0

Formula
val
Range
0 to 1
Unit
Off or on

Confirmed for 2013, 2015. In testing for 1999 to 2001, 2003 to 2004, 2007, 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2024. Not supported for 2002, 2005 to 2006, 2008, 2010, 2017, 2020, 2022, 2025 to 2026.

Low fuel pressure RX_LOW_FUEL_PRESSUREConfirmed

  • Request22 1F 6D
  • Service 22DID 1F6D
  • Module700 → 708
  • Every1 s
  • Testing for 1999 to 2016, 2018 to 2019, 2021, 2023 to 2024

Example reply from a 2026 Lexus RX.

Bits 64 to 79 of the reply, 16 bits.

0x0024 = 36 → (36 × 10) = 360 kPa

Formula
(val × 10)
Range
0 to 655350 kPa
Unit
kPa

Confirmed for 2017, 2020, 2022, 2025 to 2026. In testing for 2016, 2018 to 2019, 2021, 2023 to 2024. Not supported for 2002, 2005 to 2006, 2008, 2010, 2013, 2015.

Low fuel pressure sensor RX_LFPSConfirmed

  • Request22 10 CD
  • Service 22DID 10CD
  • Module700 → 708
  • Every1 s
  • Testing for 1999 to 2019, 2021, 2023 to 2024

Example reply from a 2026 Lexus RX.

Bits 0 to 15 of the reply, 16 bits. The value is signed.

0x8C73 = -29581 → (-29581 ÷ 10) = -2,958.1 kPa

Formula
(val ÷ 10)
Range
-3276 to 3276 kPa
Unit
kPa

Confirmed for 2020, 2022, 2025 to 2026. In testing for 2016, 2018 to 2019, 2021, 2023 to 2024. Not supported for 2005 to 2006, 2010, 2013, 2015, 2017.

Target air-fuel ratio RX_TARGET_AIR_FUEL_RATIOConfirmed

  • Request21 04
  • Service 21PID 04
  • Module7E0 → 7E8
  • Every1 s
  • Testing for 1999 to 2005, 2007, 2009, 2011 to 2012, 2014, 2016 to 2026

Bits 0 to 15 of the reply, 16 bits.

Formula
(val × 1.99 ÷ 65535)
Range
0 to 1.99
Unit
Number

Confirmed for 2010, 2013, 2015. In testing for 1999 to 2001, 2003 to 2004, 2007, 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2024. Supported for 2006, 2008. Not supported for 2002, 2005, 2017, 2020, 2022, 2025 to 2026.

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