Ford Guys What Is Code 888 For A/C

[CROWNVIC4LIFE]

My sister said her a/c was acting up all day today by cutting off and on..Code 888 came up on the automatic temperature display..The car is the 07 Grand Marquis.

Thanks in advance.

 

[Chris142]

OBD codes are not model specific.

Here's what Google shows.

PO888
TCM POWER RELAY SENSE CIRCUT

 

[CROWNVIC4LIFE]

Thanks Chris.

 

[Roadkingnc]

You have to make the control hesd enter a self test, it wont display codes on its own, it is likely failing and is a common and expensive problem. I think the last one i put in was $700 for the control head.

 

[FL_Rob]

recharge?

 

[CROWNVIC4LIFE]

Originally Posted By: Roadkingnc
You have to make the control hesd enter a self test, it wont display codes on its own, it is likely failing and is a common and expensive problem. I think the last one i put in was $700 for the control head.


She said the code came up as she was adjusting the temperature trying to get the system working again..I believe she has a extended warranty for the a/c..Hopefully she does.

 

[CROWNVIC4LIFE]

Originally Posted By: FL_Rob
recharge?


The air is coming out cold when it is working and compressor is cycling on and off normally.

 

[Roadkingnc]

The only thing that fails is the control head or the blend door actuator but it makes the temperature stick at hot or cold, most of the time it sticks on hot

 

[CROWNVIC4LIFE]

She took the car to Ford and it turned out to be the alternator..It was putting out erratic voltage..The strange thing is it only affected the a/c and nothing else..No check engine light ever came on..Nothing..I never would have guessed the alternator..It was covered under the warranty which is getting ready to expire next month..They also said the battery was not up to speed [original one] so they told her she should get a new one..They put in a Motorcraft.

Thanks everyone for your help.

 

[FL_Rob]

Altenator ?wow never -woulda guessed.

 

[bdcardinal]

Its amazing what a bad alternator or a failing battery will do to a vehicle. Especially components that require a 12v or 5v reference source.

 

[38sho]

code 888 means system pass when u self test the EATC..........

atleast on the older ones

I know the problem has been fixed but just for future reference if anyone ever sees this