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Check engine light on. code 71 - Camry Toyota Cars & Trucks

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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).

check engine light on. code - zjlimited_391.gif

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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SOURCE: check engine light was on code 71 found vacum hose

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

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SOURCE: Engine check light is on and code 71 is displayed.

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"

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SOURCE: 94 camry engine light on, code 71, how do i fix it

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

  • 617 Answers

SOURCE: 1994 4Runner V6 (non-4wd) error code 71

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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