My daughter owes a 2011 Maxima and has codes P0014, P0024, P0171 and P0174. I'm not to sure what I gotta fix, I'm 80%+ deaf so it doesn't make it easy to hear the sounds she is talking about coming from the right (pass.) side engine bay. i don't have a problem going about fixing whatever it is I need to fix. I'm not to sure of her budget so if it can be on the low end, as is never ever really is, lol.

 

Bring her (the daughter) in and have her write what's exactly wrong with the car. You want to fix the car not the codes. Just throwing P blah blah numbers doesn't help

 

I will tell her to come in and type up what she is hearing. To me I think it could be a vacuum leak, a bad exhaust manifold, a bad O2 sensor. These newer and foreign cars I'm just playing guessing games.

 

P0014 is the OBD-II generic code that the engine control module (ECM) has determined that the bank 1 exhaust camshaft is more advanced than what the ECM has commanded it be. This over-advanced condition could be during advancing or retarding of the camshaft timing.

Possible causes for P0014:
The exhaust camshaft has advanced too much when the ECM has commanded the camshaft to retard to a lower timing level
The oil is too thick, causing the passages to become clogged due to lack of oil flow to or from the camshaft phasers that control the timing.
​The camshaft phaser is stuck in the advanced position due to damage or defects.
The oil control solenoid to the bank 1 camshaft may be shorted in the open position

Possible solutions for P0014
Start by checking the engine oil to see if it is full, clean and is of the correct viscosity for the engine. Other remedies are more involved.

P0024 is the OBD-II generic code indicating the Engine Control Module (ECM) has determined that the bank 2 exhaust camshaft is in a more advanced position than what the ECM expected. The over advanced position can be during the retarding or advancement phase of the camshaft timing.

Possible causes for P0024:
The Oil Control Valve (OCV) to the bank 2 camshaft is stuck closed or has clogged passages.
The oil is too thick, causing the passages to become clogged due to lack of oil flow to or from the camshaft phasers that control the timing.
​The camshaft phaser is stuck in the advanced position due to damage or defects.

Possible solutions for P0024
Start by checking the engine oil to see if it is full, clean and is of the correct viscosity for the engine. Other remedies are more involved.

P0171 means that an oxygen sensor in bank 1 has detected a lean condition (too much oxygen in the exhaust). Bank 1 is the side of the engine that has cylinder #1. The P0171 is one of the more common trouble codes. This code is triggered by the first downstream (front) O2 sensor. The sensor provides a reading of the air/fuel ratio leaving the engine's cylinders, and the vehicles powertrain/engine control module (PCM/ECM) uses that reading and adjusts to keep the engine running at that optimum ratio of 14.7:1. If something is not right and the PCM cannot maintain the 14.7:1 ratio, but rather there is too much air, it triggers this code.

P0174 code is similar to P0171 and means that the upstream oxygen sensor in bank 2 reporting a lean condition (too much oxygen in the exhaust).

Causes for P0171 and P0174:
The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters can cause the MAF to become contaminated if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry. There could be a vacuum leak downstream of the MAF sensor Fuel problem (rail/injectors/pump/regulator).

Possible solutions for P0171 and P0174:
If you find yourself with this code, do not just assume the O2 oxygen sensor is bad and replace it first! Proper diagnosis is needed before even buying parts. Proper step-by-step diagnosis will save you money in the long run, and you'll generally learn new things. Possible solutions include: In many cases, simply cleaning the MAF sensor does the trick. I find it's best to take it off and spray it with electronics cleaner or MAF cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling Inspect all vacuum and PCV hoses, replace if necessary. Check for a dirty fuel filter and proper fuel pressure.

 

When she was telling me about the noises first thing I did was grab my OBD11 code reader. I think she has several other issues other then just the codes. We have put on a new strut assembly within the past 2 years it is out yet again, it also sounds like if her front right hub could be bad. She has the top right motor mount busted yet again.