Question about 2007 Cadillac Escalade Ext

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2007 escalade codes p0171 p0174 and stablizes light comes on

I tried intake gasket and mass air flow sensor i checked fuel pressure its good 55 psi

Posted by Anonymous on

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Posted on Jan 02, 2017

emissionwiz
  • 75066 Answers

SOURCE: Check Engine Light. I have a 03 escalade that

Your fuel pressure is WAY to low, it should be at least 55 PSI, (spec is 55-62 PSI) You will need to replace the fuel pump and the fuel filter then clear the codes and retest, the fuel pump is located inside the fuel tank, the fuel tank must be removed to access the pump. after the fuel pump is replaced if any lean codes come back from the O2 sensors the intake maniold gaskets will need to be replaced as well, they are a common problem as well but your main problem is very low fuel pressure, this alone will set all the codes you have.

Posted on Oct 28, 2010

  • 100 Answers

SOURCE: I have a check engine code 171 and 174 .Replaced

The code is referring to the vehicles fuel system being lean on bank 1 and 2. You may have a vacuum leak which is causing this problem. Take it to your local mechanic and have him smoke the system to see where the leak is. I think these cars have plastic intake manifolds that leak either through the rubber gasket, a crack in the plastic or a little plastic plug that is on the passengers side of the vehicle behind the power steering pump. Hope this helps

Posted on Dec 22, 2010

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03 Nissan Altima showing codes P0304,P0102,P0154,P0113 what are they and how do i repair the problems.


Hi Chris.

p0304 = Number 4 Cylinder Misfire Detected

Faulty spark plug 4
Clogged or faulty fuel injector 4
Faulty ignition coil 4
Fuel injector 4 harness is open or shorted
Fuel injector 4 circuit poor electrical connection
Ignition coil 4 harness is open or shorted
Ignition coil 4 circuit poor electrical connection
Insufficient cylinder 4 compression
Incorrect fuel pressure
Intake air leak

The P0304 code means that the cylinder 4 is misfiring or is randomly misfiring. Start by checking for intake leaks an if no leaks are found the next step is to replace the spark plugs on cylinder 4.


p0102 = Mass or Volume Air Flow Circuit Low Input

Faulty mass air flow sensor
Intake air leaks
Dirty mass air flow sensor
Dirty mass air filter
Mass air flow sensor harness is open or shorted
Mass air flow sensor circuit poor electrical connection

Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compress air or mass air flow sensor cleaner.
Reset code and drive vehicle.
If the code comes back, it may be necessary to replaced the mass air flow sensor.


p0154 = O2 Sensor Circuit No Activity Detected Sensor 1 Bank 2

Faulty Front Heated Oxygen Sensor Bank 2
Front Heated Oxygen Sensor Bank 2 harness is open or shorted
Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection
Inappropriate fuel pressure
Faulty fuel injectors
Intake air leaks may be faulty
Exhaust gas leaks

Replacing the Front Heated Oxygen Sensor Bank 2 usually takes care of the problem.


p0113 = Intake Air Temperature Sensor Circuit High

Faulty Intake Air Temperature (IAT) sensor
Dirty air filter
Intake Air Temperature (IAT) sensor harness is open or shorted
Intake Air Temperature (IAT) sensor circuit poor electrical connection

The Intake Air Temperature (IAT) sensor is built into mass air flow sensor or in some vehicles mounted to the air filter duct housing. The sensor detects intake air temperature and transmits a signal to the Engine Control Module (ECM).The temperature sensing unit uses a thermistor which is sensitive to the change in temperature. Electrical resistance of the thermistor decreases in response to the temperature rise. The Intake Air Temperature signal is used as an input for various systems in the vehicle.



Hope this helps
FYT

http://www.autocodes.com/make/nissan

Mar 26, 2017 | Nissan Cars & Trucks

1 Answer

Engen problem and missing


Sir, your question is not very clear, but I will still try to post a solution here. Engine missing could be due to any problem in fuel system, ignition system, engine or ECM as well.

LOW ENGINE IDLE SPEED (Poor idling):
-Throttle body (do the cleaning and idle speed learning)
-A /C signal circuit
-Fuel pump control circuit
-Fuel pump
-Intake system
-P C V valve (clogged or open) and hose

ROUGH IDLING:
-Cylinder Compression
-Ignition system (Igniters, spark plugs, wiring harness)
-Spark plug fouled, gap too wide or too short. (1.00-1.1 mm)
-Fuel injector circuit
-E C M power source circuit
-Fuel pump control circuit
-Fuel pump (required pressure 44 psi - 49 psi)
-Throttle body (cleaning)
-Intake system
-P C V valve and hose
-Air fuel ratio sensor
-Heated oxygen s ens or
-Mass air flow meter
-Idle hunting
-Throttle body
-Intake system
-P C V valve and hose
-Air fuel ratio sensor
-Mass air flow meter

HESITATION/ POOR ACCELERATION:
-Fuel pump control circuit
-Fuel pump
-Spark plug
-Ignition system
-Fuel injector circuit
-E C M power source circuit
-Mass air flow meter
-Throttle body (do cleaning)
-Intake system
-Valve timing
-Cylinder Compression


Jan 18, 2014 | 2008 Toyota Corolla

2 Answers

Van stalls intantly- misses bad if I give it gas.. Changed intake gaskets, both o2 sensers, cleaned MAF senser,and changed fuel filter.. Codes read bank 1&2 lean.. Only thing I can think of next is...


It could be a weak pump. To check, have your fuel pressure checked to see if it is correct for your vehicle. On mpfi, pressure should be around 50 psi-check the requirement for your particular vehicle. Then look to the injectors.

Apr 09, 2013 | Cars & Trucks

1 Answer

Check engine light - Code p0171, p0172, and p0174


YO HAVE A VACUM LEAK AT INTAKE MANIFOLD GASKET OR HOSES THATS YOUR PROBLEM USE A CAN OF CARB CLEANER TO HELP FIND LEAK BY SPAING ARROUND INTAKE OK HOPE THIS HELPS BUT IM SHORE THATS YOUR PROBLEM RESON YOU REPLACE YOUR FUEL PRESSURE REGULATOR LEFT INTAKE LOSE OR PINCHED GASKETS OR LOSE HOSES TRY THAT OK

Nov 14, 2012 | GMC Cars & Trucks

1 Answer

Have code P0171 on 2013 Escape


P0171 FORD - Fuel Injection System Too Lean Bank 1xicon.jpghttp://engine-codes.com/p0171_ford.htmlForum CodePossible causes- Intake air leaks
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Faulty Mass Air Flow (MAF) sensor
- Incorrect Positive Crankcase Ventilation (PCV) hose connection Tech notes If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replaced the air filter and clean the air flow meter. If the problem persist the front oxygen (O2) sensor may need to be replaced

Nov 05, 2012 | Cars & Trucks

1 Answer

Fault code p0171 what the problem


P0171 - System Too Lean Bank 1
Possible causes- Intake air leaks
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Faulty Mass Air Flow (MAF) sensor
- Incorrect Positive Crankcase Ventilation (PCV) hose connection Tech notes If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replaced the air filter and clean the air flow meter. If the problem persist the front oxygen (O2) sensor may need to be replaced.

Oct 09, 2012 | 2001 Renault Sportwagon

1 Answer

Scanned my computer , came up with a PO 171 and 174 what does this mean?


P0171 AND P0174
P0171 - System Too Engine Cylinder Lean Bank 1xicon.jpghttp://engine-codes.com/p0171.htmlForum CodePossible causes- Intake air leaks
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Faulty Mass Air Flow (MAF) sensor
- Incorrect Positive Crankcase Ventilation (PCV) hose connection Tech notes Dirty air filter of faulty air flow sensor are common causes for the P0171 code of the problem.


P0174 FORD - Fuel Injection System Too Lean Bank 2xicon.jpghttp://engine-codes.com/p0174_ford.htmlForum CodePossible causes- Intake air leaks
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Faulty Mass Air Flow (MAF) sensor
- Incorrect Positive Crankcase Ventilation (PCV) hose connection Tech notes The codes is usually set when there is an intake leak after the air flow meter, before replacing any parts check for loose or broken hoses and intake gasket leak. On Ford some models dirty air filter, and dirty or faulty air flow sensor are the cause of the problem.

Jul 27, 2012 | Cars & Trucks

1 Answer

What can cause code p0171


Dirty mass air flow sensor or clogged fuel filter or a weak fuel pump.First i would take the mass air flow sensor off and clean it with a non-chlronated brake cleaner wait 10 mminutes then re-install.If problem still exist then trplace the fuel filter.Then check your fuel pressure it should be 48-55 psi with key on and engine off.If its not within these specs replace the fuel pump.

Jan 14, 2012 | 1997 Pontiac Bonneville

2 Answers

I HAD DTC P0171 nd p0174 my truck is 1,500 5.7 engine can toy help me o n this one


the three failure codes you retrieved point to a vacuum leak from intake side of engine, check intake manifold with some engine starting fluid sprayed from outside around all sealing gaskets and if engine speed goes up or down noticably that would be your leakage area, also the mass air flow sensor being dirty would cause tthat and last a faulty fuel pump, not giving enough pressure but ok with volume amount, both p0171 and p0174 indicate a lean condition from each bank.the p0300 is random misfiring of cylinders, not one particular, it is a by-product of a lean burning condition.

Nov 09, 2011 | 1999 Chevrolet K1500

2 Answers

Check engine light on; engine codes P0171 and P0174


p0171 is lean exhaust bank one ( passenger side) and p0174 is lean exhaust bank 2 ( drivers side). First we need to look for vacuum leaks, low fuel pressure, Intake air leaks after the mass air flow sensor, pvc system. Because you have both sides lean I would start looking at these spots.

May 23, 2011 | 1998 Ford F150 Regular Cab

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