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Old 07-21-2019, 12:50 PM   #1
NewHouseTM
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Member#: 464863
Join Date: Mar 2017
Default STi 2014 Cruise Error 64

Hi

Recently I got a car that has ERROR 64 (Engine Sensor Failure 1). I check it with FreeSSM.

But there is no Engine CEL codes...

There are only two mods in the car

Forged CP pistons and Catless downpipe.

I already check every sensor in the car and seens to be working fine.

The problem happens when traveling around 100 km/h with constant speed and constant throttle, then it simple turn on the check engine light.

Before the check engine lights come on the cruise control works fine.

What could it be?
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Old 07-21-2019, 05:19 PM   #2
hrbutler52
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Member#: 295691
Join Date: Sep 2011
Chapter/Region: TXIC
Location: Houston TX
Vehicle:
2011 WRX
Blue Mica

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DTC P0064 is for the heated O2 sensor. Google search gives https://www.obd-codes.com/p0064. The cruise being in-operative with the CEL on is normal for this car.
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Old 07-22-2019, 12:26 AM   #3
NewHouseTM
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In another words it should have a catalyst to turn of the cel light.

Will it be ok if I put the o2 sensor outside the exhaust?
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Old 07-28-2019, 04:54 PM   #4
hrbutler52
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Join Date: Sep 2011
Chapter/Region: TXIC
Location: Houston TX
Vehicle:
2011 WRX
Blue Mica

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Does your catless down pipe not have the O2 sensor installed? If no sensor is installed your tuner can reset ECU parameters to not store the code and trip the CEL. Putting the sensor out side the exhaust would result in it running cold and the problem would probably persist.
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Old 08-05-2019, 01:26 PM   #5
NewHouseTM
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I already disabled the errors on the ECU, but this error appears on the cruise control module.
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