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Old 04-21-2014, 10:03 PM
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Why am I getting check engine light w/ error code P0471 after Corsa cat-back exhaust.

I just had a Corsa cat-back exhaust installed on my 2014 by my buddy who works for dealership where I bought the truck. He hooked everything up how the installation instructions tell you too. He's gonna call Corsa tomorrow and ask them what could be causing this after the proper install. The check engine light went on today after the install last Friday. I drove the truck over the weekend and no light went on till today. I brought it to the the dealership. He cleared the light and it stayed off for a little while but them went back on a few hours after he cleared the error code. Anybody have any ideas or know a fix for this?
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Old 04-22-2014, 12:20 AM
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Re: Why am I getting check engine light w/ error code P0471 after Corsa cat-back exha

P0471 code
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Old 04-22-2014, 12:23 AM
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Re: Why am I getting check engine light w/ error code P0471 after Corsa cat-back exha

P0471-EXHAUST PRESSURE SENSOR 1 PERFORMANCE

Theory of Operation




The Exhaust Gas Pressure Sensor is used to measure exhaust gas pressure in
the exhaust manifold. The Powertrain Control Module (PCM) provides a 5 volt
supply to the Exhaust Gas Pressure Sensor on the sensor supply circuit. The PCM
also provides a ground on the sensor return circuit. The Exhaust Gas Pressure
Sensor provides a signal to the PCM on the Exhaust Gas Pressure Sensor Signal
circuit.




•When Monitored:
Five seconds after key on.
•Set Condition:
The Exhaust Gas Pressure Sensor reading at key on differs by a calibrated
amount of pressure from the Barometric Pressure Sensor or the Exhaust Gas
Pressure Sensor reading varies from an estimated value during normal engine
operation.



Possible Causes


PRESSURE HOSE DISCONNECTED
PRESSURE HOSE PLUGGED OR CRUSHED
DEBRIS PLUGGING THE PRESSURE SENSOR PORT
EXHAUST GAS PRESSURE SENSOR
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Old 04-25-2014, 11:34 AM
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Re: Why am I getting check engine light w/ error code P0471 after Corsa cat-back exha

EPA OBD requires that the Exhaust Valve operation is monitored. If you put a CAT Back exhaust on without valves you have the potential of setting the check engine light at start up dure to the reduced back pressure.
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Old 04-25-2014, 04:09 PM
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Re: Why am I getting check engine light w/ error code P0471 after Corsa cat-back exha

I had the same issue with my Corsa catback, I took it to the dealer and they said that the valve was crushed and therefore was setting off the CEL. They repaired it while they waited for another one to come in. They funny thing is that I only got the CEL when it was extremely cold. It took about 2 weeks for them to get the new part in and we had temps from 8 degrees up to 50 degrees in that timeframe. After they replaced it, I haven't had any issues since!
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Old 05-02-2014, 12:25 AM
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Re: Why am I getting check engine light w/ error code P0471 after Corsa cat-back exha

Mine CEL F'inh keeps coming on during heavy excelleration. My buddy is a mechanic a my local Jeep dealership and he even called Corsa to make sure he had everything hooked up correctly which he did. I'm calling Corsa tomorrow to complain.
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