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Check engine light P0685 - 2006 Honda Accord

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Electronic control modul power control circuit malfunction

Posted on Apr 24, 2015

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Posted on Jan 02, 2017

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Wont start2004 dodge grand caravan sxt code p0685 show on dash


P0685 DODGE - Auto Shutdown Relay Control Circuit Failure
Possible causes - Faulty Engine Control Module (ECM) power relay
- ECM power relay harness is open or shorted
- ECM power relay circuit poor electrical connection
- Faulty (ECM
Possible symptoms:
Engine Light ON (or Service Engine Soon Warning Light) P0685 Dodge Description: Short or open in Auto Shutdown (ASD) relay circuit, this relay is under the hood in the relay center.

Oct 14, 2016 | 2004 Dodge Grand Caravan

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Pontiac g6 3.5 code po685


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www.autozone.com/...Codes/2.../_/P-0996b43f80cb157c

AutoZoneAutoZone Repair Guide for your Diagnostics Diagnostic Trouble Codes 2.9l L4 Vin 9 Std 3. ... Trouble Code: P0685. Engine Controls Ignition Relay Control ...

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Oct 7, 2007 - Pontiac G6 Forum .... Relax and take it to a different Pontiac dealer. ...Not every code sets the Service Engine Soon light, and some of these .... P0685Engine Controls Ignition Relay Control Circuit P0686 Engine Controls ...

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1 Answer

Check engine light has P0685 code. Engine stalled while driving. What are the possible causes of this? Is this an expensive fix?


- Faulty Engine Control Module (ECM) power relay
- ECM power relay harness is open or shorted
- ECM power relay circuit poor electrical connection
- Faulty (ECM)

Apr 24, 2015 | Cars & Trucks

1 Answer

Whats the codes p0685 an p0688 on a 2004 chrysler pacifica mean


P0685 CHRYSLER - Auto Shutdown Relay Control Circuit Failure

Short or open in Auto Shutdown (ASD) relay circuit
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
Possible Causes
- ASD relay circuit is open or shorted
- Failed Auto Shutdown relay
- Failed ECM
Tech Notes
Check all the ECM fuses, if the fuses are OK try replacing the ASD relay.

P0688 CHRYSLER - Auto Shutdown Relay Control Circuit Low

The Front Control Module (FCM) has detected the supply voltage below an acceptable value
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
Possible Causes
- ASD relay circuit is open or shorted
- Failed Auto Shutdown relay
- Failed ECM
Tech Notes
Check all the ECM fuses, if the fuses are OK try replacing the ASD relay.

Dec 29, 2014 | 2004 Chrysler Pacifica

1 Answer

What is fault code p0685


P0685 Main Relay Circuit Low Voltage.

Jul 15, 2014 | Vauxhall Astra Cars & Trucks

1 Answer

P0685 fault code uk ford


p0685 refers to ECM power relay control---circuit open===causes--wiring--ECM relay
Replace this relay. Check the wiring from the coil to the distributor as there is a dead short after the coil somewhere for the fuse to blow and the coil to overheat.. You may have a electronic module failure either in the distributor or the ECM

Dec 31, 2013 | Chrysler Cars & Trucks

2 Answers

Trouble code p0685 vehicle wont start dont know what p0685 is please help


I cannot give you any specific help because you did not bother to mention YEAR, MAKE, MODEL, or ENGINE SIZE of the vehicle you are trying to get information on.

The "generic" description of Diagnostic Trouble Code (DTC) P0685 is: "ECM power control circuit malfunction."
Yup! this would DEFINATELY keep your engine from starting! It means that the ECM has no power to operate the engine management system. So, now you know the WHAT part of the equation. You must now diagnose, using the correct information for your particular vehicle, to find out the WHY.

Aug 06, 2011 | Chrysler Pacifica Cars & Trucks

1 Answer

I have a 2003 dodge dakota. 4.7l. I get codes p0685 and p0688. No start no spark. Relay is good. But voltage drops when using a voltage meter on one of the grounds in the pdc. Any live wire and that ground...


P0685 DODGE - Auto Shutdown Relay Control Circuit Failure
Symptoms - Engine Light ON (or Service Engine Soon Warning Light)

Possible causes - ASD relay circuit is open or shorted
- Failed Auto Shutdown relay
- Failed ECM
Tech notes Check all the ECM fuses, if the fuses are OK try replacing the ASD relay. P0685 DODGE Description Short or open in Auto Shutdown (ASD) relay circuit

P0688 DODGE - Auto Shutdown Relay Control Circuit Low
Symptoms - Engine Light ON (or Service Engine Soon Warning Light)

Possible causes - ASD relay circuit is open or shorted
- Failed Auto Shutdown relay
- Failed ECM
Tech notes Check all the ECM fuses, if the fuses are OK try replacing the ASD relay. P0688 DODGE Description The Front Control Module (FCM) has detected the supply voltage below an acceptable value

Jun 24, 2011 | 2003 Dodge Dakota Club Cab

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I gat 3 cods P0129, P0685 and P0688 and then cam the "enable" I don't start the engine. What is the problem? Can you help me?


P0129-This Relates to Pressure for Barometric is too Low
P0685-This Relates to Open circuit for PCM/ECM Power Relay Control
P0688-This Relates to Circuit for PCM/ECM Power Relay Sense
I am not 100% sure that these are correct as I had to go through Chrysler settings to find this model.
I would check the airflow sensor first on the ducting from air cleaner to engine.
Check the spark plugs to ensure that they haven't fouled.
I hope this helps you,or get back to me with your results for further diagnosis.

Apr 02, 2011 | 2005 Dodge Grand Caravan

1 Answer

F/C P0685 Replacede the ASD relay and need to know if the computer needs to be reset?


You can reset it by disconnecting the battery for a couple minutes and reconnecting it. This will turn off the engine light and reset the adaptive memory.

May 30, 2009 | 2003 Jeep Liberty

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