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Code P0685 I was recently hit in th rear

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Posted on Jan 02, 2017

dttech
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SOURCE: trouble code p0685 vehicle wont

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.

Posted on Aug 06, 2011

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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

1 Answer

I recently hit a curb with my rear tire on my 2006 infiniti M35X and now the VDC and slip lights come on and my all wheel drive doesn't work nor my cruise control. What's possible wrong?


Its possible you just tripped a code. Take a OBDII scanner and scan for codes. Its possible that if you erase the codes, they wont come back and all will be well. Write down the codes in case and if it comes back look in to them. Maybe abs sensor.

Mar 09, 2015 | 2006 Infiniti M35

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

2 Answers

Van won't start after washing


I'm not sure about the codes, but I can tell you to NEVER wash your motor with an up hill spray,, chances are you got the plugs wet, and inside the plug caps, take them off and use a high prssure air stream to dry them out

Thanks, Terry

Mar 14, 2014 | 2005 Dodge Caravan

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

1 Answer

I got code p0685. i dont know what it means exactly


This is an internal PCM failure code . The only test is to clear the code and if it resets to replace the PCM. this is covered by warranty for 8 years or 80,000 miles . So if you are under this its a free repair under warranty.

P0685 error - ECM/PCM Power Relay Control Circuit open

Hope helps.

Sep 14, 2011 | Volkswagen Jetta 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

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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