Question about 1999 Ford Escort

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Ground short causing check light to stay on

I have a check engine light on code is a purge sylonoid ground short so i need voltage and amp readings for electrical system on this car also any wiring diagrams you may have

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Hey check this site out , manuals online , you can download a lot for free, should have something on wiring schematics. Hope this helps you out.

Posted on Jul 27, 2009

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Evap system Purge Flow code PO441 for 2003 Dodge 1500 4wd How to fix?


P0441: Evaporative Emission System Incorrect Purge Flow
Probable cause:
  1. Sensor or solenoid faulty
  2. Connector terminal contact damaged or corroded
  3. Wire harness fault. Check for correct voltage, open, short to ground or short to voltage
  4. Control unit software needs updating
  5. Powertrain or Engine Control Module faulty
  6. Vacuum leaks, damaged hoses or incorrect routing
  7. EVAP system - Check fuel cap, canister, valves or components

Jun 06, 2017 | Dodge Ram 1500 Cars & Trucks

1 Answer

DAIHATUS MIRA ENGINE CHEK LIGHT ON CODE P0443


Causes To cause a P0443, there has to be a problem with the purge control CIRCUIT, not necessarily the valve. Usually they are a unit housing the valve and the solenoid as an assembly. Or it could be comprised of a separate solenoid with vacuum lines to a purge valve. That said, it could be any of the following: Bad purge solenoid (internal short or open) Wiring harness chafing or rubbing another component causing short or open on control circuit Connector worn, broken or shorted due to water intrusion Driver circuit inside powertrain control module (PCM) is bad Possible Solutions 1. Using a scan tool, command the purge solenoid to activate. Listen or feel for a clicking coming from the purge solenoid. It should click once, or on some models it may click repeatedly. 2. If it doesn't click with scan tool activation, unplug the connector and examing the solenoid and connector for damage, water, etc. Then check for battery voltage on the feed wire with the key on. If you have battery voltage, then ground the control side manually using a jumper wire and see if the valve clicks. If it does, then you know the solenoid is working properly but there is a problem with the control circuit. If it doesn't click when you manually ground it, replace the purge solenoid. 3. To check for a problem on the control circuit (if the solenoid tests okay and you have voltage to the solenoid) plug the solenoid back in and remove the control circuit (ground) wire from the ECM connector (If you're unsure how to do this, do not attempt). With the ground wire removed from the ECM, turn the key on and then manually ground the Purge valve control wire. The solenoid should click. If it does, then you know there is no problem with the control wire to the solenoid and there is a problem with the ECM purge solenoid driver circuit in the ECM. You'll need a new ECM. However if it doesn't click, then there must be an open in the wiring between the ECM and and the solenoid. You must find it and repair it.

Read more at: http://www.obd-codes.com/p0443
Copyright © OBD-Codes.com

May 06, 2015 | Cars & Trucks

1 Answer

2004 Chevy impala code p0443, how do I correct


P0443 Evaporative Emission Control System Purge Control Valve Circuit
P0443 - Evaporative Emission Control System Purge Control Valve Circuit

Read more at: http://www.obd-codes.com/p0443
Copyright © OBD-Codes.com
The Evaporative Emissions System (EVAP) allows fumes from the gas tank to enter the engine to be burned, rather than vented into the atmosphere as an emission. The purge valve solenoid is supplied switched battery voltage. The ECM controls the valve by operating the ground circuit, opening the purge valve at specific times allowing these gasses to enter the engine. The ECM monitors the ground circuit as well, watching for faults. When the purge solenoid isn't activated, the ECM should see a high voltage on the ground circuit. When the solenoid is activated, the ECM should see the ground voltage pulled low, close to zero. If the ECM doesn't see these expected voltages, or senses an open in the circuit, this code is set. Note: This DTC is similar to P0444 and P0445. Potential Symptoms P0443 trouble code symptoms could be just an malfunction indicator lamp (MIL) illumination. There may be no drivability problems at all. But, it's also possible to have a lean condition or a rough running engine if the purge valve is stuck open. Usually though, these symptoms are accompanied by other EVAP codes. Another symptom may be excessive pressure in the gas tank in the form of a "whooshing" sound when the cap is removed, indicating a purge valve that isn't working at all or stuck closed. Causes To cause a P0443, there has to be a problem with the purge control CIRCUIT, not necessarily the valve. Usually they are a unit housing the valve and the solenoid as an assembly. Or it could be comprised of a separate solenoid with vacuum lines to a purge valve. That said, it could be any of the following: Bad purge solenoid (internal short or open) Wiring harness chafing or rubbing another component causing short or open on control circuit Connector worn, broken or shorted due to water intrusion Driver circuit inside powertrain control module (PCM) is bad Possible Solutions 1. Using a scan tool, command the purge solenoid to activate. Listen or feel for a clicking coming from the purge solenoid. It should click once, or on some models it may click repeatedly. 2. If it doesn't click with scan tool activation, unplug the connector and examing the solenoid and connector for damage, water, etc. Then check for battery voltage on the feed wire with the key on. If you have battery voltage, then ground the control side manually using a jumper wire and see if the valve clicks. If it does, then you know the solenoid is working properly but there is a problem with the control circuit. If it doesn't click when you manually ground it, replace the purge solenoid. 3. To check for a problem on the control circuit (if the solenoid tests okay and you have voltage to the solenoid) plug the solenoid back in and remove the control circuit (ground) wire from the ECM connector (If you're unsure how to do this, do not attempt). With the ground wire removed from the ECM, turn the key on and then manually ground the Purge valve control wire. The solenoid should click. If it does, then you know there is no problem with the control wire to the solenoid and there is a problem with the ECM purge solenoid driver circuit in the ECM. You'll need a new ECM. However if it doesn't click, then there must be an open in the wiring between the ECM and and the solenoid. You must find it and repair it.

Read more at: http://www.obd-codes.com/p0443
Copyright © OBD-Codes.com

Apr 29, 2015 | Cars & Trucks

1 Answer

P1655 came up on diagnostic test for my 1997 Pontiac grand prix. What is it and where is it located on engine? How much is it gonna cost?you


It could just be a electrical problem !
A DTC P1655 set indicates an improper voltage level has been detected on the EVAP canister purge solenoid circuit , Can you check electric circuits with a volt ohm meter ?
Diagnostic Aids
Check for the following conditions:
?€¢
Poor connection at PCM. Inspect harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal to wire connection.


?€¢
Damaged harness. Inspect the wiring harness for damage. If the harness appears to be OK, disconnect the PCM, turn the ignition ON and observe a voltmeter connected to the EVAP Canister Purge solenoid driver circuit at the PCM harness connector while moving connectors and wiring harnesses related to the EVAP Canister Purge solenoid. A change in voltage will indicate the location of the fault.


Test Description
The numbers below refer to the step numbers on the Diagnostic Table.

  1. Normally, ignition feed voltage present on the output driver circuit with the PCM disconnected and the ignition turned ON.

  2. Checks for a shorted component or a short to B+ on the output driver circuit. Either condition would result in a measured current of over 1.5 amps. Also checks for a component that is going open while being operated, resulting in a measured current of 0 amps.

  3. Checks for a faulty EVAP canister purge solenoid.

  4. This vehicle is equipped with a PCM which utilizes an Electrically Erasable Programmable Read Only Memory (EEPROM). When the PCM is being replaced, the new PCM must be programmed. Refer to Powertrain Control Module Replacement/Programming
Step
Action
Value(s)
Yes
No

1

Was the Powertrain On-Board Diagnostic System Check performed?
--
Go to Step 2
Go to Powertrain On Board Diagnostic (OBD) System Check

2
  1. Ignition OFF, disconnect the PCM.
  2. Ignition ON.
  3. Using DMM (J 39200), measure voltage between the EVAP canister purge solenoid driver circuit at the PCM harness connector and ground.
Is voltage near the specified value?
B+
Go to Step 3
Go to Step 6

3
  1. DMM to 10 amp scale, install DMM to measure current between the EVAP canister purge solenoid driver circuit and ground.
  2. Monitor the current reading on the DMM for at least 2 minutes.
Does the current reading remain between the
specified values?
0.1 amp - 1.5 amps
Go to Step 11
Go to Step 4

4
  1. Disconnect the EVAP canister purge solenoid (leave the PCM disconnected).
  2. Using DMM, measure voltage between the EVAP canister purge solenoid driver circuit and ground.
Is voltage at the specified value?
0V
Go to Step 14
Go to Step 5

5

Locate and repair short to voltage in the EVAP canister purge solenoid driver circuit (refer to Engine Electrical).
Is action complete?
--
Go to Step 16
--

6

Check the ignition feed fuse for the EVAP canister purge solenoid.
Is the fuse blown?
--
Go to Step 7
Go to Step 8

7

  1. Locate and repair short to ground in ignition feed circuit for the EVAP canister purge solenoid. Refer to Fuse Block Details in Electrical Diagnosis.
  2. Replace fuse.
Is action complete?
--
Go to Step 16
--

8

  1. Disconnect the EVAP canister purge solenoid.
  2. Ignition ON, measure voltage between the ignition feed circuit for the EVAP canister purge solenoid and ground.
Is voltage near the specified value?
B+
Go to Step 9
Go to Step 13

9

  1. Check the EVAP canister purge solenoid driver circuit for an open or a short to ground.
  2. If a problem is found, repair the EVAP canister purge solenoid driver circuit.
Was a problem found?
--
Go to Step 16
Go to Step 10

10

  1. Check the EVAP canister purge solenoid driver circuit and the ignition feed circuit for a poor connection at the EVAP canister purge solenoid and at the PCM.
  2. If a problem is found, replace faulty terminal(s).
Was a problem found?
--
Go to Step 16
Go to Step 14

11

  1. Ignition OFF, reconnect the PCM and disconnect the EVAP canister purge solenoid.
  2. Ignition ON, connect a test light between the EVAP canister purge solenoid driver circuit and the ignition feed circuit at the EVAP canister purge solenoid harness connector.
  3. Using the scan tool outputs test function, cycle the EVAP canister purge solenoid ON and OFF.
Does the test light flash ON and OFF?
--
Go to Diagnostic Aids
Go to Step 12

12

  1. Check the EVAP canister purge solenoid driver circuit for a poor connection at the PCM.
  2. If a problem is found, replace faulty terminal.
Was a problem found?
--
Go to Step 16
Go to Step 15

13

Locate and repair open in ignition feed circuit to the EVAP canister purge solenoid. Refer to Engine Electrical.
Is action complete?
--
Go to Step 16
--

14

Replace the EVAP canister purge solenoid.
Is action complete?
--
Go to Step 16
--

15
Replace the PCM.
Important: Replacement PCM must be programmed. Refer to Powertrain Control Module Replacement/Programming .
Is action complete?
--
Go to Step 16
--

16

  1. Ignition ON, engine OFF, review and record scan tool Fail Records data.
  2. Clear DTCs.
  3. Operate vehicle within Fail Records conditions as noted.
  4. Using a scan tool, monitor SPECIFIC DTC info for DTC P1655.
Does scan tool indicate DTC P1655 failed this ignition?
--
Go to Step 2
Repair complete

Apr 08, 2015 | Pontiac Cars & Trucks

2 Answers

2002 acura TL-s engine code p1456


Code P1456: EVAP control system leakage (fuel system).
Probable causes:
1. Wire harness. Check for correct voltage, open, short to ground, short to voltage
2. Control unit software in need of updating
3. Faulty PCM or ECM
4. Vacuum leaks. Damaged hoses or improper routing
5. EVAP system. Check canister, valves, or components. (gas cap excluded because you say you replaced it)

Some or all of the above could be the source of the check engine light problem.

Jan 25, 2014 | 1999 Acura TL

1 Answer

2002 Kia sportage with the code p0443


Hi Brittany:
The Evaporative Emissions System (EVAP) allows fumes from the gas tank to enter the engine to be burned, rather than vented into the atmosphere as an emission. The purge valve solenoid is supplied switched battery voltage.

The ECM controls the valve by operating the ground circuit, opening the purge valve at specific times allowing these gasses to enter the engine. The ECM monitors the ground circuit as well, watching for faults. When the purge solenoid isn't activated, the ECM should see a high voltage on the ground circuit. When the solenoid is activated, the ECM should see the ground voltage pulled low, close to zero. If the ECM doesn't see these expected voltages, or senses an open in the circuit, this code is set.

Potential Symptoms: P0443 trouble code symptoms could be just an malfunction indicator lamp (MIL) illumination. There may be no drivability problems at all. But, it's also possible to have a lean condition or a rough running engine if the purge valve is stuck open. Usually though, these symptoms are accompanied by other EVAP codes. Another symptom may be excessive pressure in the gas tank in the form of a "whooshing" sound when the cap is removed, indicating a purge valve that isn't working at all or stuck closed.

To cause a P0443, there has to be a problem with the purge control CIRCUIT, not necessarily the valve. Usually they are a unit housing the valve and the solenoid as an assembly. Or it could be comprised of a separate solenoid with vacuum lines to a purge valve. That said, it could be any of the following:
Bad purge solenoid (internal short or open)
Wiring harness chafing or rubbing another component causing short or open on control circuit
Connector worn, broken or shorted due to water intrusion
Driver circuit inside powertrain control module (PCM) is bad

Possible Solutions
1. Using a scan tool, command the purge solenoid to activate. Listen or feel for a clicking coming from the purge solenoid. It should click once, or on some models it may click repeatedly.

2. If it doesn't click with scan tool activation, unplug the connector and examing the solenoid and connector for damage, water, etc. Then check for battery voltage on the feed wire with the key on. If you have battery voltage, then ground the control side manually using a jumper wire and see if the valve clicks. If it does, then you know the solenoid is working properly but there is a problem with the control circuit. If it doesn't click when you manually ground it, replace the purge solenoid.

3. To check for a problem on the control circuit (if the solenoid tests okay and you have voltage to the solenoid) plug the solenoid back in and remove the control circuit (ground) wire from the ECM connector (If you're unsure how to do this, do not attempt). With the ground wire removed from the ECM, turn the key on and then manually ground the Purge valve control wire. The solenoid should click. If it does, then you know there is no problem with the control wire to the solenoid and there is a problem with the ECM purge solenoid driver circuit in the ECM. You'll need a new ECM. However if it doesn't click, then there must be an open in the wiring between the ECM and and the solenoid. You must find it and repair it.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Feb 23, 2012 | Kia Sportage Cars & Trucks

2 Answers

Engine code po496 2006 chevy trailblazer


Diagnostic Test Code (DTC) P0496 means that there is purge flow through the Evaporative Emissions System (EVAP) during non-purge. The Powertrain Control Module (PCM) measures fuel tank pressure by reading the voltage from the Fuel Tank Pressure Sensor (FTP). The PCM controls the pressure by opening and closing the EVAP Canister Purge Solenoid Valve (CPV). It accomplishes this by grounding and un-grounding the control circuit to the CPV. When the CPV is open, engine vacuum is applied to the EVAP canister and ultimately, the fuel tank itself. When this happens the pressure inside the tank drops, causing a voltage change in the FTP sensor.
This code sets when there is a pressure drop in the tank when the CPV is commanded closed (there should not be any vacuum applied).

The code can actually be caused by several things. It could be caused by a faulty FTP sensor giving false readings to the PCM. It can be caused by a voltage drop in the FTP sensor circuit caused by wire corrosion or a bad/corroded connector, etc. It can be caused by a short to ground in the CPV control circuit, causing the CPV to be "ON" all the time. It can be caused by a CPV that is just plain stuck and will not close properly.

A faulty or "stuck" CPV is the most likely cause of the problem however, the rest of the circuits and sensor involved should be checked for proper operation before replacing any parts. (It would be a total waste of your money to replace the CPV only to find that you have a shorted control circuit.)

May 23, 2011 | 2006 Chevrolet Trailblazer

2 Answers

Push the gas and the engine wont rev past 2000 rpm. i have a 2002 ford escape 3.0L. i ran a diagnostic n it threw a p0443 code.


From: http://www.obd-codes.com/p0443 P0443 - Evaporative Emission Control System Purge Control Valve Circuit OBD-II Trouble Code Technical Description

Evaporative Emission Control System Purge Control Valve Circuit
What does that mean?

The Evaporative Emissions System (EVAP) allows fumes from the gas tank to enter the engine to be burned, rather than vented into the atmosphere as an emission. The purge valve solenoid is supplied switched battery voltage. The ECM controls the valve by operating the ground circuit, opening the purge valve at specific times allowing these gasses to enter the engine. The ECM monitors the ground circuit as well, watching for faults. When the purge solenoid isn't activated, the ECM should see a high voltage on the ground circuit. When the solenoid is activated, the ECM should see the ground voltage pulled low, close to zero. If the ECM doesn't see these expected voltages, or senses an open in the circuit, this code is set.
FB.init("dd7d9e9681341cde77587bc6a2029f6f"); OBD-Codes.com on Facebook Potential Symptoms

P0443 trouble code symptoms could be just an malfunction indicator lamp (MIL) illumination. There may be no drivability problems at all. But, it's also possible to have a lean condition or a rough running engine if the purge valve is stuck open. Usually though, these symptoms are accompanied by other EVAP codes. Another symptom may be excessive pressure in the gas tank in the form of a "whooshing" sound when the cap is removed, indicating a purge valve that isn't working at all or stuck closed.
Causes

To cause a P0443, there has to be a problem with the purge control CIRCUIT, not necessarily the valve. Usually they are a unit housing the valve and the solenoid as an assembly. Or it could be comprised of a separate solenoid with vacuum lines to a purge valve. That said, it could be any of the following:

  • Bad purge solenoid (internal short or open)
  • Wiring harness chafing or rubbing another component causing short or open on control circuit
  • Connector worn, broken or shorted due to water intrusion
  • Driver circuit inside powertrain control module (PCM) is bad
Possible Solutions

1. Using a scan tool, command the purge solenoid to activate. Listen or feel for a clicking coming from the purge solenoid. It should click once, or on some models it may click repeatedly.

2. If it doesn't click with scan tool activation, unplug the connector and examing the solenoid and connector for damage, water, etc. Then check for battery voltage on the feed wire with the key on. If you have battery voltage, then ground the control side manually using a jumper wire and see if the valve clicks. If it does, then you know the solenoid is working properly but there is a problem with the control circuit. If it doesn't click when you manually ground it, replace the purge solenoid.

3. To check for a problem on the control circuit (if the solenoid tests okay and you have voltage to the solenoid) plug the solenoid back in and remove the control circuit (ground) wire from the ECM connector (If you're unsure how to do this, do not attempt). With the ground wire removed from the ECM, turn the key on and then manually ground the Purge valve control wire. The solenoid should click. If it does, then you know there is no problem with the control wire to the solenoid and there is a problem with the ECM purge solenoid driver circuit in the ECM. You'll need a new ECM. However if it doesn't click, then there must be an open in the wiring between the ECM and and the solenoid. You must find it and repair it.

Mar 02, 2011 | Ford Escape Cars & Trucks

1 Answer

I have a check engine light on my 2003 chevy truck it reads PO445


P0445 Evaporative Emission Control System Purge Control Valve Circuit Shorted
The Evaporative Emissions System (EVAP) allows fumes from the gas tank to enter the engine to be burned, rather than vented into the atmosphere as an emission. The purge valve solenoid is supplied switched battery voltage. The ECM controls the valve by operating the ground circuit, opening the purge valve at specific times allowing these gasses to enter the engine. The ECM monitors the ground circuit as well, watching for faults. When the purge solenoid isn't activated, the ECM should see a high voltage on the ground circuit. When the solenoid is activated, the ECM should see the ground voltage pulled low, close to zero. If the ECM doesn't see these expected voltages, or senses an open in the circuit, this code is set.
Hope this helps

Feb 10, 2009 | 2003 Chevrolet Silverado 1500

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