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Hey so I have a 2011 wrx. My engine light was on so I brought it to my friends work to see what was wrong but when he read it it was all cobb errors that none of us could read due to my tune. He erased the engine light and After that my idle has been as low as 100 rpm. Is it possible that he had erased my tune from the car? I’ve been driving it and it dies sometimes at lights or even when I’m turning at a lower speed. I assume it’s been long enough for my car to relearn the tune as well but I can’t find any other problems or leaks with the car. Help on this would be deeply appreciated, thanks
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Unless he flashed something no.

Those codes are related to Cobb flexfuel stuff, they are the error, not blocking errors.. How is your car modified and what tune are you running?
 

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Ethanol sensor module voltage codes:

C0BB1 - Ethanol Sensor Voltage Low Input - Enabled if the input voltage is below Ethanol Sensor DTC Limit (Voltage)(Low)(C0BB1 DTC) continuously until Ethanol Sensor DTC Delay (Low)(C0BB1 DTC) expires.
C0BB2 - Ethanol Sensor Voltage High Input - Enabled if input voltage is above Ethanol Sensor DTC Limit (Voltage)(High)(C0BB2 DTC) continuously until Ethanol Sensor DTC Delay (High)(C0BB2 DTC) expires.
Verify voltage output from the Ethanol module to ECU using Accessport or Accesstuner live connect. Depending on which physical input you've connected the hardware to, check the corresponding Sensor Input Voltage monitor i.e. TGV L, TGV R, or Rear O2.
Is voltage in the appropriate range? COBB's flex fuel kit uses a 0.5-4.5 V range for normal operation. Other systems may use the full 0-5V range since they don't support error checking.
If you use a 0-5V system with an Accesstuner calibration that does not have the low and high limits set correctly for your hardware, you will throw a code when on very low or high ethanol content levels.
While you're at it, check to see if voltage is sane for the estimated ethanol content of the fuel in your vehicle. If not, you may have connected the flex fuel kit to a different input than your calibration expects i.e. hardware hooked up to TGV R and the calibration is set up for it to be hooked to TGV L.
If you're using a COBB flex fuel kit, here are some additional troubleshooting scenarios and tips to help take advantage of our custom module's error reporting capabilities:
0.0V - Power or ground supply fault, module fault
Suggestion: Check connections to rear o2 and TGV harnesses. BOTH must be plugged in (or wire in) for unit to function. Confirm supply voltage and ground continuity if the issue persists and harnesses are connected.
0.1V - Sensor fault, the module to sensor electrical connection fault, waiting for sensor data
Suggestion: Check connections for continuity, replace harness if necessary. If harness tests well, reset ECU and try again. If the issue returns, replace the sensor.
0.2V - Sensor error, internal fault
Suggestion: Replace the sensor.
4.8V - Sensor/Fuel error, compensation out of range
Suggestion: Remove fuel from the car if possible, flush fuel system with known good fuel and see if issues returns. If persists, replace the sensor.
4.9V - Fuel error (water, debris)
Suggestion: Remove fuel from the car if possible, flush fuel system with known good fuel. While water in your fuel is the most common cause, debris or some fuel additives may prevent ethanol sensors from getting a proper reading if in high enough concentration.
5.0V - Wiring short
Suggestion: Check to wire for damage, short.

Fuel pressure sensor voltage codes: (Non DIT Only)

C0BB3 - Fuel Pressure Sensor Voltage Low Input - Enabled if input voltage is below Fuel Pressure Sensor DTC Limit (Voltage)(Low)(C0BB3 DTC) continuously until Fuel Pressure Sensor DTC Delay (Low)(C0BB3 DTC) expires.
C0BB4 - Fuel Pressure Sensor Voltage High Input - Enabled if input voltage is below Fuel Pressure Sensor DTC Limit (Voltage)(High)(C0BB4 DTC) continuously until Fuel Pressure Sensor DTC Delay (High)(C0BB4 DTC) expires.
Verify voltage output from the Ethanol module to ECU using Accessport or Accesstuner live connect. Depending on which physical input you've connected the hardware to, check the corresponding Sensor Input Voltage monitor i.e. TGV L, TGV R, or Rear O2.
Is voltage in the appropriate range? COBB's fuel pressure sensor kit uses a 0.5-4.5 V range for normal operation. Other systems may use the full 0-5V range since they don't support error checking.
If you use a 0-5V system with an Accesstuner calibration that does not have the low and high limits set correctly for your hardware, you will throw a code when fuel pressure is in the low or high end of the sensor's range.
While you're at it, check to see if the voltage is sane for the estimated fuel pressure under current conditions. If not, you may have connected the fuel pressure sensor kit to a different input than your calibration expects i.e. hardware hooked up to TGV L and the calibration is set up for it to be hooked to TGV R.

Maximum safe ethanol content level exceeded: (DIT Only)

C0BB5 - Max. Safe Ethanol Concentration Exceeded - Enabled if Ethanol final exceeds the Ethanol Sensor DTC Max. Safe Ethanol Concentration for Tune (C0BB5 DTC) threshold continuously until Ethanol Sensor DTC Max. Safe Ethanol Concentration for Tune (C0BB5 DTC) Delay expires, while C0BB1 and C0BB2 are not set.
Each calibrator will need to decide what they deem to be the maximum safe ethanol content for the mechanical configuration and use.
Setting the Ethanol Sensor DTC Max. Safe Ethanol Concentration for Tune (C0BB5 DTC) threshold to 100.00% will disable this check.

General Failure Code

COBBF - Map Programming Error - This error is caused by some type of corruption or error within the map that is reflashed to the ECU. Please try a different map or attempt to re-save the map in the latest version of the Accesstuner software. If you continue to have issues, please contact Cobb customer support with a memory snapshot (under Troubleshooting menu on Accessport) when the C0BBF code is present. DO NOT DRIVE OR OPERATE THE CAR IF THIS CODE IS PRESENT. Fatal engine damage can occur. Please have the vehicle towed to your home or preferred Protuner for diagnosis.
 
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