Mazda CX-5 MAF Sensor Issues
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Mazda CX-5 MAF Sensor Issues
Hello everyone, I am new to this forum. I have a 2014 Mazda Cx-5 with around 132k miles.
I recently had an issue where I went to start my car after work one night and it would crank, start then shut off immediately. I unplugged the MAF sensor, and it started right up and ran no problem. I went to my local AutoZone and bought a Duralast MAF sensor and put it in and had no issues for a while as it seemed to fix my issue.
Now I have a different issue, I have a check engine light that I have tried to reset multiple times for code P0171 - System Too Lean, which shows both a permanent and pending code for it. I assume it has something to do with the sensor so I am wondering if anyone else experienced this so I can avoid throwing parts at other causes of this code. Should I start by replacing the sensor with a different brand? Are these cars temperamental to the brand of parts that are put in them? Thank you all!
I recently had an issue where I went to start my car after work one night and it would crank, start then shut off immediately. I unplugged the MAF sensor, and it started right up and ran no problem. I went to my local AutoZone and bought a Duralast MAF sensor and put it in and had no issues for a while as it seemed to fix my issue.
Now I have a different issue, I have a check engine light that I have tried to reset multiple times for code P0171 - System Too Lean, which shows both a permanent and pending code for it. I assume it has something to do with the sensor so I am wondering if anyone else experienced this so I can avoid throwing parts at other causes of this code. Should I start by replacing the sensor with a different brand? Are these cars temperamental to the brand of parts that are put in them? Thank you all!
Senior Member
Joined: Oct 2018
Posts: 10,605
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From: Northern California
Welcome to the forum
A DTC does not always point to a bad part. before replacing any part you should varify that part is bad.
Clearing the DTC really only turns off the check engine light. Because that DTC is in the permanent file is because you cleared the check engine light, so you felt better not seeing the caution. The permanent DTC file area remains until the fault is corrected and the engine runs through several complete cycles which would have turned off the check engine dash light and also remove the DTC in all areas of the ECU. If you go to the I/M monitors it may help, give a clue to what your DTC is not correcting.
If you don't understand the use of a DTC and I/M monitors as a way to solve a problem without replacing random parts at your Mazda that go to a service shop and pay for a diagnostic report to tell you the actual cause of your DTC. If you do decide to seek professional advise, (best idea for a DIY) find a service shop with a currently Certified Automotive Diagnostic Technician.
A DTC does not always point to a bad part. before replacing any part you should varify that part is bad.
Clearing the DTC really only turns off the check engine light. Because that DTC is in the permanent file is because you cleared the check engine light, so you felt better not seeing the caution. The permanent DTC file area remains until the fault is corrected and the engine runs through several complete cycles which would have turned off the check engine dash light and also remove the DTC in all areas of the ECU. If you go to the I/M monitors it may help, give a clue to what your DTC is not correcting.
If you don't understand the use of a DTC and I/M monitors as a way to solve a problem without replacing random parts at your Mazda that go to a service shop and pay for a diagnostic report to tell you the actual cause of your DTC. If you do decide to seek professional advise, (best idea for a DIY) find a service shop with a currently Certified Automotive Diagnostic Technician.
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