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Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: VW
Satisfied Customers: 1573
Experience:  Owner at Carolina Auto Service & Sales , 20 years Experience in Foreign& Domestic vehicles
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Volkswagon 2010 EOS - throwing DTC PO-2187. What is best

Customer Question

Volkswagon 2010 EOS - throwing DTC PO-2187. What is best procedure to go through the long list of possible causes?
Submitted: 5 months ago.
Category: VW
Expert:  Chad Farhat replied 5 months ago.

Hi my name is ***** ***** I will be assisting you

Expert:  Chad Farhat replied 5 months ago.

did you look at fuel trims and seen if you running lean or rich and live data stream can you tell me ?

let me know

thanks

Chad(aka Jhook1398)

Expert:  Chad Farhat replied 5 months ago.

1-YOU NEED TO RUN A FUEL PRESSURE TEST

Fuel Pressure Test Special tools, testers and auxiliary items required ◊Multimeter. ◊fuel line adapter set (V.A.G. 1318/17A). These tools may be substituted with an equivalent aftermarket tool and are also available for rental or purchase through Volkswagen. ◊In line Fuel pressure gauge with shutoff valve. (high pressure). Test conditions ◊Battery voltage 12.5 V ◊Function and voltage supply for the Fuel Pump is OK. ◊Fuel tank at least 1/4 filled. ◊Ignition switched Off. Test procedure - Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] See: Computers and Control Systems > Scan Tool Testing and Procedures > Preliminary Check Fuel system is under pressure! Before opening the system, place rags around the connection area. Then release the pressure by carefully loosening the connection. Always wear eye protection! Start diagnosis - Disconnect fuel supply line - 3 - at the supply location and catch any fuel coming out with a shop towel

◊Pull circlip upward to unlock fuel line

- Install a fuel pressure gauge with appropriate adapters.

- Open shut off valve on fuel gauge.

- Switch ignition on and off repeatedly until fuel pressure stops increasing pressure.

- Read fuel pressure on the gauge.

◊Specified value: 3.5 to 6 bar

If specification is exceeded:

- Check return line between fuel filter and fuel pump for kinks or blockage.

If no malfunction in fuel return line is found:

- Pressure relief valve in fuel filter is malfunctioning.

- Replace the fuel filter. Refer to the Repair Information.

If reading was below the specification:

- Check fuel pressure at the fuel filter between fuel pump and fuel filter using appropriate adapters

- Open shut off valve on gauge and start the engine. Allow to idle.

- Slowly close the pressure gauge shut off and note the fuel pressure.

◊Pressure must increase to 6 bar.

When 6 bar is reached: Open shut off tap immediately!

If pressure has increased during test:

- Fuel pump is OK. Pressure relief valve in fuel filter is malfunctioning.

- Replace the fuel filter. Refer to the Repair Information.

If pressure did not increase:

- Fuel pump is faulty

- Replace the fuel pump. Refer to the Repair Information.

Final procedures

After the repair work, the following work steps must be performed in the following sequence:

1. Check the DTC memory. Refer to => [ Diagnostic Mode 03 - Read DTC Memory ] See: Computers and Control Systems > Scan Tool Testing and Procedures > Diagnostic Modes 01 - 09.

2. If necessary, erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] See: Computers and Control Systems > Scan Tool Testing and Procedures > Diagnostic Modes 01 - 09.

3. If the DTC memory was erased, generate readiness code. Refer to => [ Readiness Code ] See: Computers and Control Systems > Monitors, Trips, Drive Cycles and Readiness Codes > Readiness Code.

2- NEXT FUEL PRESSURE SENSOR TEST

Fuel Pressure Sensor, Checking Special tools, testers and auxiliary items required ◊Multimeter. ◊Wiring diagram. Test requirements ◊The Fuel Pump (FP) Control Module (J538) OK. ◊ The Motronic Engine Control Module (ECM) (J623) fuses OK. ◊The fuel filter OK. ◊The battery voltage at least 12.5 V. ◊All electrical consumers switched off (radiator fan must NOT run during test). ◊A/C switched off. ◊The fuel tank at least 1/4 filled. ◊The ignition switched Off. Test procedure - Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] See: Computers and Control Systems > Scan Tool Testing and Procedures > Preliminary Check Start diagnosis - Remove the engine cover with air filter. Refer to the Repair Information. Checking voltage - Disconnect the Fuel Pressure Sensor (G247) electrical harness connector. - Switch the ignition On. - Using a multimeter, check the Fuel Pressure Sensor (G247) view - 1 - electrical harness connector terminals for voltage.

- Switch the ignition Off.

If the specified value was obtained:

- Replace the Fuel Pressure Sensor (G247). Refer to the Repair Information.

If the specified value was Not obtained:

Checking wiring connections

- Remove the Motronic Engine Control Module (ECM) (J623). Refer to the Repair Information.

- Using a multimeter, check the Fuel Pressure Sensor (G247) electrical harness connector terminals to the Motronic Engine Control Module (ECM) (J623) electrical harness connector T60 terminals for an open circuit according to the chart below.

Specified value: 1.5 ohms Max.

If the specified value was Not obtained:

- Check the wiring for an open, high resistance or short to ground.

- Check the electrical harness connector for damage, corrosion, loose or broken terminals.

- If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring:

- Replace the Motronic Engine Control Module (ECM) (J623). Refer to the Repair Information.

- Install the engine cover with air filter. Refer to the Repair Information.

Final procedures

After the repair work, the following work steps must be performed in the following sequence:

1. Check the DTC memory. Refer to => [ Diagnostic Mode 03 - Read DTC Memory ] See: Computers and Control Systems > Scan Tool Testing and Procedures > Diagnostic Modes 01 - 09.

2. If necessary, erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] See: Computers and Control Systems > Scan Tool Testing and Procedures > Diagnostic Modes 01 - 09.

3. If the DTC memory was erased, generate readiness code. Refer to => [ Readiness Code ] See: Computers and Control Systems > Monitors, Trips, Drive Cycles and Readiness Codes > Readiness Code.

Expert:  Chad Farhat replied 5 months ago.

3-EVAP TEST IF THE P2187 IS INDICATING LEAN CONDITION THIS TEST IS RAN

Evaporative Emission Canister Purge Regulator Valve Checking Special tools, testers and auxiliary items required ◊Multimeter. ◊Wiring diagram. Test requirements ◊The Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80) fuse OK. ◊The ignition switched Off. ◊Voltage for the Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80) is supplied via the Engine Component Power Supply Relay (J757). Test procedure - Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] See: Computers and Control Systems > Scan Tool Testing and Procedures > Preliminary Check Start diagnosis - Remove the engine cover with air filter. Refer to the Repair Information. - Disconnect the Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80) electrical harness connector - 1 -.

Zoom and Print Options

Checking internal resistance

- Using a multimeter, check the Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80) terminals 1 and 2 for resistance.

Zoom and Print Options

Specified value: 22.0 to 30.0 ohms.

If the specified value was Not obtained:

- Replace the Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80).

If the specified value was obtained:

Checking voltage supply

- Using a multimeter, check the electrical harness connector terminal 1 to 2 for voltage.

Zoom and Print Options

- Turn ignition switch On.

Specified value: 10.6 volts +/- 2 volts.

If the specified value was Not obtained:

- Leave the multimeter positive lead on terminal 1 and connect the multimeter negative lead to engine ground.

- Ignition switch On.

Specified value: Battery voltage.

- Turn ignition switch Off.

If the specified value was Not obtained:

- Check the wire from the Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80) electrical harness connector terminal 1 to fuse 24 in Fuse Panel B for an open or high resistance.

- Check the electrical harness connector for damage, corrosion, loose or broken terminals.

- If necessary, repair the wiring connection.

If the specified value was obtained:

Check Ground activation

- Remove the Motronic Engine Control Module (ECM) (J623). Refer to the Repair Information.

- Using a multimeter, check the Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80) electrical connector terminal 2 to the Motronic Engine Control Module (ECM) (J623) electrical connector T60 terminal 35 for an open circuit.

Zoom and Print Options

Specified value: 1.5 ohms max.

If the specified value was Not obtained:

- Check the wiring for a short to voltage, high resistance or an open circuit.

- Check the electrical harness connector for damage, corrosion, loose or broken terminals.

- If necessary, repair the wiring connection.

If the specified value was obtained:

- Replace the Motronic Engine Control Module (ECM) (J623). Refer to the Repair Information.

- Install the engine cover with air filter. Refer to the Repair Information.

Final procedures

After the repair work, the following work steps must be performed in the following sequence:

1. Check the DTC memory. Refer to => [ Diagnostic Mode 03 - Read DTC Memory ] See: Computers and Control Systems > Scan Tool Testing and Procedures > Diagnostic Modes 01 - 09.

2. If necessary, erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] See: Computers and Control Systems > Scan Tool Testing and Procedures > Diagnostic Modes 01 - 09.

3. If the DTC memory was erased, generate readiness code. Refer to => [ Readiness Code ] See: Computers and Control Systems > Monitors, Trips, Drive Cycles and Readiness Codes > Readiness Code.

Expert:  Chad Farhat replied 5 months ago.

4- OXYGEN SENSOR TEST

Oxygen Sensor Regulation Before Catalytic Converter, Checking ◊Use only gold-plated terminals when servicing terminals in the electrical harness connector of the Heated Oxygen Sensor (HO2S) (G39). Special tools, testers and auxiliary items required ◊Multimeter. ◊Wiring diagram. Test requirements ◊ The Heated Oxygen Sensor (HO2S) (G39) fuse OK.

◊The Oxygen Sensor (O2S) Heater (G39) before catalytic converter OK.

◊Battery voltage at least 12.5 volts.

◊All electrical consumers such as, lights and rear window defroster, switched off.

◊A/C switched off.

◊Ground connections between engine/transmission/chassis OK.

◊Exhaust system between catalytic converter and cylinder head properly sealed.

◊Coolant Temperature at least 80 °C.

Test procedure

- Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] See: Computers and Control Systems > Scan Tool Testing and Procedures > Preliminary Check

Start diagnosis

- Connect scan tool.

- Start the engine and let it run at idle.

- Select "Diagnostic Mode 6: Check test results of components that are not continuously monitored".

- Select "Monitor-ID 01: Oxygen sensor monitoring before catalytic converter".

- Select "Test-ID $89: Dynamic test".

- Check the specified values at idle.

If the specified value was obtained:

- Switch the ignition Off. Fault is not active at this time. Check for poor connections, loose terminals and harness check.

If the specified value was Not obtained:

Checking primary voltage

- Disconnect the Heated Oxygen Sensor (HO2S) (G39) electrical harness connector - 1 -.

- Turn the ignition On.

- Using a multimeter, check the Heated Oxygen Sensor (HO2S) (G39) electrical harness connector - 1 - terminals 1 to 2 for voltage.

- Turn the ignition On.

Specified value: 0.400 to 0.500 Volts

If the specified value was obtained:

- Replace the Heated Oxygen Sensor (HO2S) (G39). Refer to the Repair Information.

If the specified value was Not obtained:

Checking wiring

- Remove the Motronic Engine Control Module (ECM) (J623). Refer to the Repair Information.

- Using a multimeter, check the Heated Oxygen Sensor (HO2S) (G39) electrical harness connector terminals to the Motronic Engine Control Module (ECM) (J623) electrical harness connector T94 terminals for an open circuit.

Specified value: 1.5 ohms Max.

If the specified value was Not obtained:

- Check the wiring for an open, high resistance or short to ground.

- Check the electrical harness connector for damage, corrosion, loose or broken terminals.

- If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring and the voltage was Not present:

- Replace the Motronic Engine Control Module (ECM) (J623). Refer to the Repair Information.

Final procedures

After the repair work, the following work steps must be performed in the following sequence:

1. Check the DTC memory. Refer to => [ Diagnostic Mode 03 - Read DTC Memory ] See: Computers and Control Systems > Scan Tool Testing and Procedures > Diagnostic Modes 01 - 09.

2. If necessary, erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] See: Computers and Control Systems > Scan Tool Testing and Procedures > Diagnostic Modes 01 - 09.

3. If the DTC memory was erased, generate readiness code. Refer to => [ Readiness Code ] See: Computers and Control Systems > Monitors, Trips, Drive Cycles and Readiness Codes > Readiness Code.

Expert:  Chad Farhat replied 5 months ago.

5- FUEL INJECTOR TEST

Fuel Injectors, Checking The following test procedure is used to diagnose all fuel injectors. Special tools, testers and auxiliary items required ◊Multimeter. ◊12V diode test lamp ◊Wiring diagram. Test requirements ◊ The Fuel Injectors (N30, N31, N32, N33) fuses OK. ◊The Engine Speed (RPM) Sensor (G28) is OK. ◊Battery voltage at least 12.5 volts. ◊All electrical consumers such as, lights and rear window defroster, switched off. ◊Vehicles with automatic transmission, shift selector lever into position "P" or "N". ◊A/C switched off. ◊Ground connections between engine/transmission/chassis OK. ◊Ignition switched Off. - Observe safety precautions. - Observe rules for cleanliness. Test procedure - Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] See: Computers and Control Systems > Scan Tool Testing and Procedures > Preliminary Check Start diagnosis - Remove the engine cover. - Disconnect the Fuel Injector electrical harness connectors from Fuel Injectors (N30, N31, N32, N33)- arrows -.

Zoom and Print Options

Checking internal resistance

- Using a multimeter, check the Fuel Injector electrical terminals 1 to 2 for resistance.

Zoom and Print Options

Specified value: 12.0 to 20.0 ohms (at approx. 20° C)

If the specified value was Not obtained:

- Replace the malfunctioning Fuel Injector. Refer to the Repair Information.

If the specified value was obtained:

Checking activation and wiring

- Connect a 12V diode test lamp to the electrical harness connector terminals 1 and 2 of the Fuel Injector to be tested.

Zoom and Print Options

- Operate the starter and test the activation of the Fuel Injector.

LED should flicker.

- Switch the ignition Off.

If LED does not flicker:

- Remove the Engine Control Module (ECM) (J623). Refer to the Repair Information.

- Using a multimeter, check the Fuel Injector electrical harness connector terminals to the Engine Control Module (ECM) (J623) electrical harness connector T60 terminals for an open circuit.

Zoom and Print Options

Specified value: 1.5 ohms Max.

If the specified value was Not obtained:

- Check the wiring for an open, high resistance or short to ground.

- Check the electrical harness connector for damage, corrosion, loose or broken terminals.

- If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring:

- Replace the Engine Control Module (ECM) (J623). Refer to the Repair Information.

Final procedures

After the repair work, the following work steps must be performed in the following sequence:

1. Check the DTC memory. Refer to => [ Diagnostic Mode 03 - Read DTC Memory ] See: Computers and Control Systems > Scan Tool Testing and Procedures > Diagnostic Modes 01 - 09.

2. If necessary, erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] See: Computers and Control Systems > Scan Tool Testing and Procedures > Diagnostic Modes 01 - 09.

3. If the DTC memory was erased, generate readiness code. Refer to => [ Readiness Code ] See: Computers and Control Systems > Monitors, Trips, Drive Cycles and Readiness Codes > Readiness Code.

Expert:  Chad Farhat replied 5 months ago.

SO THE DIFFERENCE IS THE EVAP TEST IS ONLY

REQUIRED IF THE P2187 IS ON THE RICH SIDE BUT ALL THE OTHER TEST APPLIES

Hope I was helpfull to you , PLEASE Let me know if you need anything else on it

A Positive rating is Much Aprecciated

This Post Will Stay Open for you to Come Back And Ask Me Any Follow Up Questions You May have On This Issue Even after You Rate Me

Thank You

Chad Farhat ( aka - Jhook1398 )
ASE Certified Technician

Customer: replied 5 months ago.
This is the order in which you would preform those tests?
Customer: replied 5 months ago.
I am going to call it a night now. I will pick up on this tomorrow evening. Thanks so far. Looks like I have a lot to do. How long does this usually take. What kind of data do you want from the scanner? Some people online found it was the MAF sensor. I have lower readings for this, but not super low.
Customer: replied 5 months ago.
It says it is "lean" so not "rich".
Expert:  Chad Farhat replied 5 months ago.

yes you do

Expert:  Chad Farhat replied 5 months ago.

the order will be

1- fuel pressure

2- fuel sensor

3- fuel injector

4- oxygen sensor

5- Evap if needed , but i will do it anyway you will find cracked vacuum lines, usually

let me know

Chad(aka jhook1398)

Expert:  Chad Farhat replied 5 months ago.

I m online usualy from 10 am till 12 pm or later daily

during the day i will be busy at my shop so it might take me longer to respond to you but usualy withing 30 min to an 1 hr , at night i have more time so usualy quicker

Thanks

Chad(jhook1398)

Expert:  Chad Farhat replied 5 months ago.

as far as mass air flow , to check it you need to have the scanner with you in car another person watching the live data and watch the mass airflow air volume when the gear changes from 2nd to 3rd at a full kick down ( another words give it a kick down) , what is the flow per sec at the mas air flow at that moment when the gear changes that should be peak flow , let me know what that value is ?

Thanks

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