Question about RTO Spur Sprocket For Stihl 017, 021 Chainsaws

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When Checking resistance in a circuit open means electricity will flow or wont flow.and does closed mean electricity will not flow or does closed meanthere is alot of resistance

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Think of a circuit as a circle. When the circle is closed, the electricity can make the complete way around. When it is open, the electricity is stopped. So an open circuit is not complete and the electricity will not flow, while a closed circuit will allow the electricity to come "full circle".

Posted on Oct 05, 2010

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Posted on Jan 02, 2017

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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

What does it means p2258 code for 2003 Ford Focus , Smog test Failed


P2258 Secondary Air Injection System Control A Circuit High

http://www.motorcraftservice.com/vdi...f/OBDSM505.pdf

Secondary air systems typically utilize an electric air pump as well as one or two electrically controlled check valves to deliver air into the exhaust manifold.

The only vehicle which uses secondary air is the 2.3L PZEV Focus. The Focus uses a system with ported air. This means that airflow is delivered to each individual exhaust port. The secondary air pump is energized soon after start-up while the fuel system is in open loop and icing conditions are not likely. After the O2 sensors warm up, the secondary air pump continues to be energized while the fuel system goes into closed loop fuel. The secondary air system continues to run in closed loop fuel until the air pump is de-energized. The typical time period in which the AIR pump is energized is approximately 12 seconds.

The AIR pump flow check monitors the HO2S signal at idle to determine if secondary air is being delivered into the exhaust system. The air/fuel ratio is commanded open-loop rich, the AIR pump is turned on and the time required for the HO2S signal to go lean is monitored. If the HO2S signal does not go lean within the allowable time limit, a low/no flow malfunction is indicated. (P0411)

The electric air pump draws high current and must be energized through a separate relay. Both the primary and secondary circuits are checked for opens and shorts. First, the output driver within the PCM (primary circuit) is checked for circuit continuity (P0412). This circuit energizes the relay and the vacuum-operated check and control valve(s). Next, a feedback circuit from the secondary side of the relay to the PCM is used to check secondary circuit continuity (P2257, P2258).

Nov 22, 2013 | Cars & Trucks

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1996 chevy blazer 4wd 4.6 liter evap code p0446? what is the problem?


P0446 Evaporative Emmission Control System Vent Control Circuit

Evap vent valve has only one purpose. It closes in order to seal the vent so the EVAP system can pressurize and ensure there are no leaks.

This code could mean one or more of these issues have happened:

Faulty vent valve
Open, short or excessive resistance on Vent valve control circuit

Blockage of vent valve

Bad PCM

Here are some things you can try:

Replace Vent valve

Repair open, short, or resistance problem in control circuit

Repair open, or short, or resistance problem in power circuit

Replace PCM

Oct 17, 2013 | 1996 Chevrolet Blazer

1 Answer

What does massor volume air flow circuit high input mean?


1. check for leaks between maf sensor and throttle valve control module 2.voltage supply faulty 3.sensor power circuit open from fuel pump relay to maf sensor 4 .sensor signal circuit open may be disconnected from ecm and maf 5 faulty ground cable resistance between connector terminal 1 and ground 6. mass sensor malfunction. most of the time when sensor circuit high input.either sensor failed or you have fault in ground cable causing resistance between connector terminal 1 and ground.voltage supply to sensor faulty.

May 25, 2011 | 2001 Volkswagen Passat

2 Answers

What does the diagnostic code P0446 for a 2001 isuzu rodeo mean?


Hi, your vent valve has malfuntioned. The vent valve is near the tank, and has a hose to the tank and a solenoid to close it. Check the wiring/connector. If OK, try applying 12 volts directly to the solenoid. If it does not click when voltage is applied, replace the solenoid/valve.

P0446 Evaporative Emmission Control System Vent Control Circuit OBD-II Trouble Code Technical Description

Evaporative Emission Control System Vent Control Circuit Malfunction
What does that mean? Evap vent valve has only one purpose. It closes in order to seal the vent so the EVAP system can pressurize and ensure there are no leaks. Evap vent valve is usually supplied Batt. voltage with key on. The ECM's driver controls the ground, and when grounded, activates the valve (closing it). If the ECM detects a short to ground, and open,or a short to battery voltage on the control circuit, P0446 will set. Code also may refer to ECM detecting that EVAP system is unable to achieve or maintain vacuum during test.
Symptoms There will be no obvious symptoms to driver, other than MIL illumination.
Causes A code P0446 could mean one or more of the following has happened:

  • Faulty vent valve
  • Open, short or excessive resistance on Vent valve control circuit
  • Blockage of vent valve
  • Bad PCM
Possible Solutions With a P0446 OBD-II trouble code, here are some things to try:
  • Replace Vent valve
  • Repair open, short, or resistance problem in control circuit
  • Repair open, or short, or resistance problem in power circuit
  • Replace PCM

May 14, 2011 | Isuzu Rodeo Cars & Trucks

1 Answer

Water does not come to the washing chamber


Switch the machine on when the room is quiet

Dial up a cool wash hit the start button then listen while you remove the power you should hear water falling into the drum

If there is power to the fill valve ? then you need to put a meter across the terminals to check for resistance , no resistance means an open circuit coil and a the valve will not open

Jan 05, 2010 | Washing Machines

1 Answer

I scann my car 2005 corollathe code came p0441and p0445 what does it mean engine light blinking


p0441: Evaporative Emission Control System Incorrect Purge Flow;
A code P0441 could mean one or more of the following has happened:

Bad vacuum switch
  • Broken or damaged EVAP line or canister
  • Open in PCM purge command circuit
  • Open or short in Voltage feed circuit to Purge Solenoid
  • Faulty purge solenoid
  • Restriction in EVAP solenoid, line or canister
  • Corrosion or resistance in purge connector
  • Bad PCM

p0445: Evaporative Emission Control System Purge Control Valve Circuit Shorted
(This also came up already above)

Nov 30, 2009 | 2005 Toyota Corolla

1 Answer

Check engine code "P0446 Evap Control System Vent Control Circ"


Unfortunately, this code has nothing to do with the gas cap....
A code P0446 could mean one or more of the following has happened:
  • Faulty vent valve
  • Open, short or excessive resistance on Vent valve control circuit
  • Blockage of vent valve
  • Bad PCM
Here are some things you could try to fix it:
  • Replace Vent valve
  • Repair open, short, or resistance problem in control circuit
  • Repair open, or short, or resistance problem in power circuit
  • Replace PCM


Nov 17, 2009 | 2002 Toyota Corolla

3 Answers

Error code p 0441


P0441 Evaporative Emission Control System Incorrect Purge Flow OBD-II Trouble Code Technical Description Evaporative Emission Control System Incorrect Purge Flow
What does that mean? This indicates that a part of the EVAP control system is no longer fuctioning correctly. The EVAP system consists of many parts, including (but not limited to) the gas cap, fuel lines, carbon canister, purge valve, and other hoses. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system
. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.
EVAP emission canister purge is contolled by a valve which allows engine vacuum to pull stored fuel vapors from fuel tank into the engine to be burned, rather than be vented to atmosphere. A vacuum switch is used to detect when flow exists. If the PCM commands purge and sees that the switch is closed (indicating no detected purge flow) P0441 is set.
copyscape.gif Symptoms Likely, no symptoms will be discernible to the driver, other than the illuminated Check Engine Light.
Causes A code P0441 could mean one or more of the following has happened:
  • Bad vacuum switch
  • Broken or damaged EVAP line or canister
  • Open in PCM purge command circuit
  • Open or short in Voltage feed circuit to Purge Solenoid
  • Faulty purge solenoid
  • Restriction in EVAP solenoid, line or canister
  • Corrosion or resistance in purge connector
  • Bad PCM
Possible Solutions With a P0441 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:
  • Common Chrysler fix - Replace Leak Detection Pump / LDP
  • Repair damaged EVAP lines or canister
  • Repair open or short in voltage feed circuit to Purge Solenoid
  • Repair open in PCM purge command circuit
  • Replace purge Solenoid
  • Replace vacuum switch
  • Repair restriction in Evap line or canister or soleniod
  • Repair resistance in purge connector
  • Replace PCM

Oct 05, 2009 | 2003 Dodge Intrepid

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