Question about Toyota Camry
The Code 71 points to a problem with the EGR Gas Temp Sensor. This sensor
measures the temperature of the exhaust gases present at the EGR valve
and sends this information to the ECU. The ECU compares this reading to
its programmed nominal value to confirm proper EGR system operation. If
the temperature is too high, the ECU senses that exhaust gases are not
being recirculated and NOx emissions will be abnormal. With this sensor
faulty it can very well effect fuel delivery, which can lower MPG's (sample Camry engine).
Carbon build up on the EGR valve? There's always a possibility given the age of the vehiclee, but seeing as you are experience a loss of MPG's and have a straight forward Code71, i'd suspect a faulty sensor. Obviously cleaning the EGR ports is always a big help, but i'd venture to say that faulty sensor is playing a big role as well.
While replacing the sensor, clean the sensor's port and clean the EGR ports and you should see an improvement. The EGR Valves on these vehicles are fairly solid, and I don't think it will require replacement. Just a good cleaning of all the EGR related items/ports.
Hope this helps (remember to rate this answer).
Posted on May 25, 2011
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Posted on Jan 02, 2017
code 71 is EGR system malfunction usually a failed modulator blocked passages or a failed temperature switch at the EGR.
Posted on Dec 23, 2010
The most likely failure is your egr valve is stuck, but here is a link for a little more help:
Posted on Nov 19, 2009
Testimonial: "Thanks. I still will have some work to do to pinpoint the problem"
That is your Exhaust Gas Ricirculation system malfunction that you got, this part has to be replaced it costs between $130 dollars to $140 depending on the part store you go to.
Posted on May 05, 2009
2.4L code 71 - EGR Gas Temp Sensor
3.0L code 71 - EGR Gas Temp Sensor
There is a test procedure to tell if bad sensor or wiring problem, can email diagram to you if like need an email address to send to
Posted on Feb 08, 2010
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