2001 RX 300 , 3.288 v on bank 1 sensor 1 high voltage. Bank 2 .355

Asked by Feb 22, 2017 at 09:28 PM about the Lexus RX 300

Question type: Maintenance & Repair

P-1130 code changed bank 1air / fuel sensor for big bucks. Still high voltage

4 Answers


P1130 LEXUS - Air/Fuel Ratio Sensor Circuit Range/Performance Malfunction Bank 1 Sensor 1...Possible causes; Faulty Air fuel Ratio (A/F) Bank 1, Sensor 1 Air fuel Ratio (A/F) Bank 1, Sensor 1 harness is open or shorted, Air fuel Ratio (A/F) Bank 1, Sensor 1 circuit poor electrical connection, Fuel pressure, Fuel injector Intake air leaks...The 1130 code is set when A/F sensor output voltage change value is not what the Engine Control Module (ECM) is expecting...The Air-Fuel ratio (A/F) sensor varies its output voltage in proportion to the air-fuel ratio. Based on the output voltage, the Engine Control Module (ECM) determines if the air-fuel ratio is RICH or LEAN and adjusts the stoichiometric air-fuel ratio. The ECM also checks the fuel injection volume compensation value to check if the A/F sensor is deteriorating or not. A/F sensor response deterioration is determined by the ratio of the A/F sensor output voltage variation and fuel trim variation.

Nice text book answer. 110,000 miles very easy miles really...no problems at all vehicle runs great , no history on t-belt or tune up I am looking for recommendations on procedures propane engine enhancement ? Compression test ? Tune up ?

Replaced sensor #1 short 0 volts, open 5 volts, fuel pressure ? Only on bank 1 ? . Both sensors are Varying . Scanner hooked up key on veh. not running bank 1 sensor 3.2 v . bank 2 sensor 0 .?


You realize the pulse would only go to the injector that needs to fire, or turn on...

Your Answer

RX 300

Looking for a Used RX 300 in your area?

CarGurus has 9 nationwide RX 300 listings starting at $3,900.

Postal Code:

Lexus RX 300 Experts

  • #1
  • #2
    John Orlando
  • #3
View All

Related Models For Sale

Used Lexus RX 350
35 Great Deals out of 552 listings starting at $645
Used Lexus RX 330
4 Great Deals out of 19 listings starting at $5,400
Used Toyota Highlander
18 Great Deals out of 599 listings starting at $3,500
Used Lexus RX 450h
41 listings starting at $18,888
Used Lexus RX 400h
7 listings starting at $8,990
Used Toyota Camry
43 Great Deals out of 1,582 listings starting at $1,700
Used Honda CR-V
53 Great Deals out of 2,708 listings starting at $1,495
Used Toyota RAV4
58 Great Deals out of 2,881 listings starting at $2,999
Used Acura MDX
46 Great Deals out of 450 listings starting at $2,888
Used Toyota 4Runner
6 Great Deals out of 411 listings starting at $5,995
Used Lexus NX 200t
9 Great Deals out of 256 listings starting at $33,699
Used Lexus ES 300
5 listings starting at $4,995
Used BMW X5
32 Great Deals out of 737 listings starting at $3,200
Used Lexus GS 300
10 listings starting at $7,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.