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Old 01-17-2020, 05:21 PM   #1
Jenkem
Scooby Newbie
 
Member#: 482809
Join Date: Mar 2018
Default Rear 02 sensor code P0137 - 2016 WRX

Hello all. Driving today my check engine light came on and my AP displayed that I had a rear 02 sensor code (rear 02 sensor low voltage). I reset it and the code hasn't come back, but I have a feeling it will. If the light comes back on what would you suggest would be the first steps I should take? Check for exhaust leak? What Gauge readings should I focus on using the AP?

Mods:

Stage 2 MAPerformance
MAP Intake
Invidia catted DP
Crawford AOS

All these mods have been on the car for over a year with no issues on the same tune.


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Old 01-20-2020, 12:30 PM   #2
ADSubaru
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Member#: 510909
Join Date: Jan 2020
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having a similar issue, let me know if you ever get to the bottom of this.
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Old 01-20-2020, 01:37 PM   #3
yarrgh
Scooby Specialist
 
Member#: 80465
Join Date: Jan 2005
Chapter/Region: RMIC
Location: Denver
Vehicle:
2001 2.5RS
Black Diamond Pearl

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Check the wiring to the sensor. Make sure plugs are clean and secure, make sure the pins are all seated correctly. That's the cheapest/easiest step. If it's still occurring, replacement is an option, they are a wear item.
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