Question about 2005 Nissan Pathfinder

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Just replaced timing chain now service light came on, reading evap control system pressure. Are they connected in any way? Or something different?

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  • Nissan Master
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No the two things are not connected, but you could have knocked off a wiring plug or hose for the vapor canister while working on the engine.

Posted on Feb 08, 2014

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Posted on Jan 02, 2017

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SOURCE: cant get light off replaced evap solenoid and

try removing the negative on the battery, wait a few minutes and re-install. If that won't work, you'll have to buy, rent or borrow someones code scanner that has the "code clearing" function. Though, if you clear it and 10 minutes late it comes back, then you still have a problem.

Hope this helps

Posted on Feb 04, 2010

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Code reading is 1447 is it the same as 1440?


No these are 2 different fault codes, although they are related to the same system
EVAP control system does not operate properly.
- EVAP control system has a leak in the line between intake manifold and EVAP control system pressure sensor.

Possible causes include ...
- EVAP canister purge volume control solenoid valve stuck closed.
- EVAP control system pressure sensor and its circuit.
- Loose, disconnected, or improper connection of rubber tube.
- Blocked rubber tube.
- Blocked or bent rubber tube to MAP/BARO switch solenoid valve.
- Cracked EVAP canister.
- EVAP canister purge volume control solenoid valve.
- Closed Throttle Position Switch.
- Improper connection of one-way valve.
- Blocked purge port.
- EVAP canister vent control valve.

Nov 02, 2016 | Cars & Trucks

2 Answers

Evap control circuit.service engine light is on


Doesn't matter what light is on your dash,
or what system has a problem

You read your owners manual,then you check for codes,
every time you have any vehicle issue

Sep 13, 2013 | GMC Yukon XL Cars & Trucks

1 Answer

Diagnostic code p0701


P0453 means EVAP emission pressure sensor high input. Possible causes:
- Faulty Evaporative Emission System (EVAP) Pressure sensor
- Evaporative Emission System (EVAP) Pressure sensor harness is open or shorted
- Evaporative Emission System (EVAP) Pressure sensor circuit poor electrical connection.
Code p0701 means Transmission control system range/performance. Possible causes:
- Open or short transmission control system circuit
- Poor transmission control system electrical connection
- Check powers and grounds to Transmission Control Module (TCM)

Aug 27, 2013 | Cars & Trucks

1 Answer

What is P 1491 in Nissan pathfinder 2003 and how to fix it


DTC 1491 (VACUUM CUT VALVE BYPASS VALVE) DIAGNOSIS

SERVICE PROCEDURE

1. Confirm the Vacuum Cut Valve is installed correctly

NOTE :

^ The Vacuum Cut Valve will not work correctly and a DTC will be stored if it is installed upside-down.

^ The Vacuum Cut Valve is a white plastic valve near the fuel tank and EVAP canister.


2. Connect CONSULT-II and turn the ignition key to "N" (do not start the engine).

3. On CONSULT II, select ENGINE - DATA MONITOR - SELECTION FROM MENU - EVAP SYSTEM PRESSURE SENSOR.

4. Note the EVAP System Pressure Sensor Voltage Confirm that it is reading in a normal range for a key ON arid engine OFF condition.

NOTE :For 2001 models and earlier:

^ Voltage in step 4 should be near 3.36 volts.

^ The normal range is between 3.32 - 3.40 volts.


For 2002 models:

^ Some 2002 models use a new type EVAP System Pressure Sensor with different operational characteristics.

^ Refer to the EC section of the appropriate Service Manual to determine which type sensor your vehicle is equipped with.

^ Models that use the new type EVAP System Pressure Sensor will have a voltage reading that varies with changes in the "barometric" pressure (atmospheric air pressure that changes with altitude and/or weather conditions).

^ The usual voltage range obtained in step 4 with the new type EVAP System Pressure Sensor is between 3.8 and 4.2 volts. Because this range will vary with barometric pressure, it is best to compare readings with a known good vehicle.

^ Some 2002 models use the earlier type EVAP System Pressure Sensor (same as used on 2001 and earlier models). The normal range for the earlier type is 3.32 to 3.40 volts and does not vary with barometric pressure.


5. Start the engine. Observe the EVAP System Pressure Sensor voltage.

^ If the value has reduced 0.04 volts or more from the reading obtained in step 4, the EVAP Canister Purge Volume Control Solenoid Valve may be leaking.

^ Refer to the EC section of the appropriate Service Manual for inspection procedures of the EVAP Canister Purge Volume Control Solenoid Valve, DTC P1444.


NOTE :The EVAP Canister Purge Volume Control Solenoid Valve is located in the engine compartment.

6. Perform the DTC Confirmation Procedure for DTC P1491. Refer to the EC section of the appropriate Service Manual for confirmation procedure steps and driving conditions.

7. If the DTC confirmation results are NG, do the following:

a. Refer to the EC section of the appropriate Service Manual to determine if the vehicle is equipped with On-Board Refueling Vapor Recovery (ORVR).

^ If the vehicle has ORVR, go to b.

^ If the vehicle does NOT have ORVR, go to step 8.

b. Place a clamp on the Refueling EVAP Vapor Line near the fuel tank. The Refueling EVAP Vapor Line is the larger hose (see figure 2). Use hose clamp (3M P/N # 08556-1), found in Fuel Injector Cleaning Kit J-45701, or equivalent.

c. Retry DTC Confirmation Procedure

d. If the result is now OK, the Refueling Control Valve may be leaking and should be inspected. Refer to the EC section of the appropriate Service Manual for Refueling Control Valve inspection procedures.

8. If the DTC confirmation is still NG after step 7, or the vehicle is not equipped with ORVR, do the following:

a. Disconnect two (2) lines from the Vacuum Cut Valve. One that goes to the fuel tank and one that goes to the EVAP Canister (see figure 1).

b. Use a hand vacuum pump to check each of the two (2) disconnected hoses for free flow. Make sure they are clear into the fuel tank (vent line) and into the EVAP Canister (see figure 2).


NOTE :

^ Figure 2 includes ORVR system. Refer to the appropriate service manual to determine if your vehicle has ORVR or not.

^ The lines between the Vacuum Cut Valve and Fuel Tank, and between the Vacuum Cut Valve and EVAP Canister may go through a metal line. Make sure the lines are clear between the Vacuum Cut Valve and Fuel Tank, and between the Vacuum Cut Valve and EVAP Canister, including any metal lines.

c. If any blockage is found, determine the cause and repair as necessary. Blockage in either of these lines will cause a DTC.


9. If all of the above checks do not locate the source of the incident, refer to the appropriate Service Manual for further DTC P1491 diagnosis.

Jun 29, 2011 | Nissan Pathfinder Cars & Trucks

1 Answer

My 99 alero has emission code P0452 how. Can I fix it


P0452 - Evaporative Emission Control System Pressure Sensor Low Input.
An excessively low voltage from the sensor is sent to ECM.

The EVAP control system pressure sensor detects pressure in the purge line. The sensor output voltage to the ECM increases as pressure increases. The EVAP control system pressure sensor is not used to control the engine system. It is used only for on board diagnosis.

Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)

Possible causes
- The EVAP control system pressure sensor circuit is open or shorted
- EVAP control system pressure sensor may be faulty

Possible solution
- Retight gas cap - Replaced EVAP Control System Pressure Sensor

Hope this helps.

Jun 02, 2011 | Oldsmobile Alero Cars & Trucks

1 Answer

I have a 2003 Kia sorento 3.5 liter engine 2 wheel drive. Check engine light on reading code P0453 Evaporative Emission system pressure sensor / switch high input. Any idea what is the cause of this...


possible causes--- p0453-- - Rubber hose to EVAP control system pressure is clogged, vent, kinked, disconnected or improper connection.
- EVAP control system pressure sensor may be faulty
- EVAP posible solutions, - Retight gas cap - Replaced EVAP Control System Pressure Sensor. have a good day !!

May 19, 2011 | 2003 Kia Sorento

3 Answers

What is evaporation control system malfuction mean? The code is P0440


Hi, the computer has sensed through the fuel tank pressure sensor that the vapor cannister is not evacuating properly. I have pasted details on the EVAP system below. Check the purge valve on top of the engine as shown below (#1 in picture). Make sure the electrical connector is on the valve, that the wires are not damaged, and check the hose for kinks. If all looks good, I recommend you replace the valve. A new valve is $23 at autozone. Please let me know if you have more questions and thanks for using FixYa.

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Description & Operation
EVAP Canister
The canister is filled with carbon pellets used to absorb and store fuel vapors. Fuel vapor is stored in the canister until the control module determines that the vapor can be consumed in the normal combustion process.
EVAP Control System
The evaporative emission (EVAP) control system limits fuel vapors from escaping into the atmosphere. Fuel tank vapors are allowed to move from the fuel tank, due to pressure in the tank, through the vapor pipe, into the EVAP canister. Carbon in the canister absorbs and stores the fuel vapors. Excess pressure is vented through the vent line and EVAP vent solenoid to atmosphere.
The EVAP canister stores the fuel vapors until the engine is able to use them. At an appropriate time, the control module will command the EVAP purge solenoid ON, open, allowing engine vacuum to be applied to the EVAP canister. With the EVAP vent solenoid OFF, open, fresh air will be drawn through the solenoid and vent line to the EVAP canister. Fresh air is drawn through the canister, pulling fuel vapors from the carbon.
The air/fuel vapor mixture continues through the EVAP purge pipe and EVAP purge solenoid into the intake manifold to be consumed during normal combustion. The control module uses several tests to determine if the EVAP system is leaking.
The EVAP system consists of the following components:
EVAP Purge Solenoid
The EVAP purge solenoid controls the flow of vapors from the EVAP system to the intake manifold. This normally closed solenoid is pulse width modulated (PWM) by the control module to precisely control the flow of fuel vapor to the engine. The solenoid will also be opened during some portions of the EVAP testing, allowing engine vacuum to enter the EVAP system.
EVAP Service Port
The EVAP service port is located in the EVAP purge pipe between the EVAP purge solenoid and the EVAP canister. The service port is identified by a green colored cap.
EVAP Vent Solenoid
The EVAP vent solenoid controls fresh airflow into the EVAP canister. The solenoid is normally open. The control module will command the solenoid closed during some EVAP tests, allowing the system to be tested for leaks.
Fuel Tank Pressure Sensor
The FTP sensor measures the difference between the pressure or vacuum in the fuel tank and outside air pressure. The control module provides a 5-volt reference and a ground to the FTP sensor. The FTP sensor provides a signal voltage back to the control module that can vary between 0.1-4.9 volts. As FTP increases, FTP sensor voltage decreases, high pressure = low voltage. As FTP decreases, FTP voltage increases, low pressure or vacuum = high voltage.

Feb 10, 2011 | 2002 Chevrolet TrailBlazer

2 Answers

I have a code P1447 Evap purge flow monitor on my 97 Pathfinder. What is and how do I correct this issue?


P1447 - Evaporative Emission (EVAP) Control System, Purge Flow Monitor
In this evaporative emission (EVAP) control system, purge flow occurs during non-closed throttle conditions. Purge volume is related to air intake volume. Under normal purge conditions (non-closed throttle), the EVAP canister purge volume control solenoid valve is open to admit purge flow. Purge flow exposes the EVAP control system pressure sensor to intake manifold vacuum.

Under normal conditions (non-closed throttle), sensor output voltage indicates if pressure drop and purge flow are adequate. If not, a fault is determined. Malfunction is detected when EVAP control system does not operate properly, EVAP control system has a leak between intake manifold and EVAP control system pressure sensor.

Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)

Possible causes
* EVAP canister purge volume control solenoid valve stuck closed
* EVAP control system pressure sensor and the circuit
* Loose, disconnected or improper connection of rubber tube
* Blocked rubber tube
* Cracked EVAP canister
* EVAP canister purge volume control solenoid valve circuit
* Closed throttle position switch
* Blocked purge port
* Closed throttle position switch


Test is and send us your updated.

Jan 14, 2011 | 1998 Nissan Pathfinder

3 Answers

Emission control malfuction p0440


Easier said then done without professional tools

However, I'll start you will some theory, then the shop manual procedures followed by some "common" problems

Theory:
Evaporative leak detection strategy is based on applying vacuum to EVAP system and monitoring vacuum decay. Powertrain Control Module (PCM) monitors vacuum level by means of fuel tank vacuum sensor input. At a predetermined time, EVAP purge solenoid and EVAP vent solenoid are turned on. This allows engine vacuum to draw a small vacuum on entire EVAP system. Whenever a sufficient vacuum level cannot be achieved, a large leak or faulty EVAP purge solenoid is indicated.

Conditions for setting this DTC are as follows:
No TP sensor, ODM, IAT sensor, or MAP sensor DTCs present.
Start-up ECT 40-86°F (4-30°C).
Start-up ECT not greater than 14°F (8°C) greater than start-up IAT.
Start-up IAT not greater than 4°F (2°C) of start-up ECT.
Fuel tank level is 15-85 percent.
BARO is greater than 75 kPa.
Vehicle has been driven at least 11 miles.
EVAP system is unable to achieve or maintain vacuum during diagnostic test.

Diagnostic Procedures
1.) Perform On-Board Diagnostic (OBD) system check.
After performing OBD system check, go to next step.

2.) Check if DTC P1665 or P1676 is also set. If any of DTCs is present, diagnose affected DTCs. If DTCs are not present, go to next step.

3.) Turn ignition off. Remove fuel filler cap. Turn ignition on. Using scan tool, observe fuel tank pressure. If fuel tank pressure is zero in. H2O, go to next step. If fuel tank pressure in not zero in. H2O, diagnose evaporative system.

4.) Replace fuel filler cap. Using scan tool, capture FAILURE RECORD data for DTC P0440 and clear DTC. Command EVAP vent solenoid on. Connect EVAP Pressure/Purge Diagnostic Station (J-41413) to EVAP service port. Pressurize EVAP system using diagnostic station. Monitor pressure on EVAP pressure gauge on diagnostic station. If pressure is 5 in. H2O, go to next step. If pressure is not 5 in. H2O, go to step 6.

5.) Maintain EVAP pressure at 5 in. H2O. Observe fuel tank pressure on scan tool. If fuel tank pressure reading on scan tool is 5 in. H2O, go to step 8. If reading is not 5 in. H2O, go to next step.

6.) Disconnect fuel tank vapor line and EVAP purge line from EVAP canister. Block canister fitting for fuel tank pressure line. Connect a hand-held vacuum pump to canister fitting for EVAP purge line. Ensure that EVAP vent solenoid is still commanded on. Apply vacuum to EVAP canister. If vacuum can be maintained at 5 in. Hg, go to step 11. If vacuum cannot be maintained at 5 in. Hg, go to step 10.

7.) Check for restriction in fuel tank vapor line or EVAP purge line. Repair as necessary. After repairs, go to step 16. If restriction is not found, diagnose EVAP system.

8.) Disconnect vacuum source line at EVAP purge solenoid and plug vacuum source fitting on solenoid. Using scan tool's output tests function, select and activate SYSTEM PERF. Pressurize EVAP system to 5 in H2O. Observe EVAP pressure gauge on diagnostic station while removing plug from EVAP purge solenoid vacuum source fitting. If EVAP pressure decreases to zero in. H2O within 15 seconds while system performance is activated, go to next step. If EVAP pressure does not decrease to zero in. H2O within 15 seconds, go to step 13.

9.) Install vacuum gauge on EVAP diagnostic station to vacuum source line. Start and operate engine to greater than 2000 RPM. Observe source vacuum level. If vacuum level is greater than -15 in. Hg, If vacuum level is not greater than -15 in. Hg, go to step 14.

10.) Check for disconnected or damaged vent hose. Check for damaged EVAP canister. Repair as necessary. After repairs, go to step 16. If no problems are found, go to next step.

11.) Check for faulty or missing fuel filler cap. Check for disconnected or leaking fuel tank vapor line. Check for disconnected or damaged EVAP purge line. If problem is found, repair as necessary. After repairs, go to step 16. If no problems are found, go to next step.

12.) Using scan tool, command EVAP vent solenoid on. Continuously attempt to pressurize the EVAP system by leaving the EVAP diagnostic station control knob in the pressurized position. Using the Ultrasonic Leak Detector (J-41416), locate and repair leak in EVAP system. After repairs, go to step 16.

13.) Replace EVAP purge solenoid. After replacing solenoid, go to step 16.

14.) Check for carbon release into the EVAP system. Repair as necessary. After repairs, go to step 16.

15.) Replace EVAP vent solenoid. After replacing solenoid, go to next step.

15.) Turn ignition on. Using scan tool, command EVAP vent solenoid on. Using EVAP diagnostic station, pressurize EVAP system to 15 in. H2O. Move rotary switch in diagnostic station to HOLD and observe EVAP pressure gauge. If EVAP pressure decreases to less than 10 in. Hg within 2 minutes, repeat step 3. If EVAP pressure does not decrease, system is okay.

Diagnostic Aids
Check for the following:
Cracked or punctured EVAP canister.
Damaged or disconnected source vacuum line, EVAP purge line, vent hose, for fuel tank vapor line.
Poor connection at PCM.
Inspect harness connectors for backed-out terminals, improper mating, broken lock, damaged terminals, or poor wire connection.
Check for intermittent in circuit.
Check for kinked, pinched or plugged vacuum lines to EVAP purge or fuel tank vapor line. Also check for restrictions.
Faulty or damaged evaporative canister.

Apr 28, 2010 | 1999 Buick Century

2 Answers

Question regarding a honda odyssey 1999 check engine light codes.


Ramon
P0420 relates to the catalytic converter. The computer sees little or no improvement in the exhaust before and after going through the converter. Either your oxygen sensors need replacement (3 total) or you need a new catalytic converter.
What is the mileage on the vehicle? Does it run well? Oxygen sensors generally start to fail after 70,000 miles. Catalytic converters usually fail because the engine is runnig rich and the owner ignores that fault for months. This causes the catalytic converter to overheat and fail.

P1456 relates to the evaporative emission system. This system holds the gas fumes in the system so they are not vented to the atmosphere. The most common cause of this code being set is failing to properly tighten the gas cap after refueling. Take the cap off and clean the sealing O-ring. Put it back on and tighten till it clicks 3 times. Make sure you have the correct gray colored gas cap. Clear the code and see if it resets within a few days. If it does, try replacing the gas cap.
Charlie

Jun 26, 2008 | 1999 Honda Odyssey

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