2003 Lexus Gx 470 Gx470 Fill Tank Yesterday After Drive About 10km Check

2003 LEXUS GX 470
114,000 MILES
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MOHMED
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i have a problem with my lexus gx470 i fill my tank yesterday and after i drive for about 10km my check engine light came on ,vsc , vsc trac came on and i diagnose 3 times the lights want off i drove the jeep for 10km the 3 lights came on again and on the scaner is showing oxygen sensor bank 1 what should i do
Nov 19, 2012 at 11:30 PM
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KHLOW2008
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We need the EXACT code to understand your problem.
Nov 20, 2012 at 2:36 PM
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MOHMED
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the code is p0031 oxygen sensor heater control ciruit bank1 sensor 1 i used the scaner to erase the faulit so after i drove the lexus gx470 for 10km the check engine light came on again i used 2 bottels of fuel injector cleaner and 1 bottle of octane booster i said maybe the problem will be fixed it didn't so how can i fix it
Nov 25, 2012 at 2:28 AM
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KHLOW2008
  • ✓ASE Certified Mechanic
  • 41,814 POSTS
  • ASE Certified Mechanic
P0031 - Oxygen sensor heater control ciruit (Bank1 Sensor 1)


DTC P0031 is set when heater current of 0.2 amps or less is present when heater operates with +B at greater than 10.5 volts and less than 11.5 volts (one trip detection logic) or heater current of 0.25 amps or less when heater operates with +B at greater than 11.5 volts (one trip detection logic).

Possible causes are:

l Open or short in heater circuit of heated oxygen sensor.
l Faulty heated oxygen sensor heater.
l Faulty relay.
l Faulty ECM.

If the sensor is bad, which seems to be the case, it has to be replaced to rectify the fault.
Nov 25, 2012 at 9:33 PM
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