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nathan william calhoun Posted on Dec 29, 2014
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Whats the codes p0685 an p0688 on a 2004 chrysler pacifica mean

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Mikey

Mikey

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  • Chrysler Master 6,904 Answers
  • Posted on Dec 29, 2014
Mikey
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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.

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