Trouble Codes - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 01-28-2019, 06:14 PM Thread Starter
PSN Newb
 
G-force's Avatar
 
Join Date: Jul 2017
Posts: 2
Garage
Trouble Codes

Need some Help Here ?

Trouble Codes................Po-238


Trouble Codes................PO-603
G-force is offline  
Sponsored Links
Advertisement
 
post #2 of 3 (permalink) Old 01-28-2019, 07:19 PM
PSN Veteran
 
Bugman's Avatar
 
Join Date: Aug 2007
Location: Gypsum, Co
Posts: 5,157
Re: Trouble Codes

P0238 is the map sensor on the firewall. I would only go OEM on this if you decide to replace it.

P0603 happens whenever you disconnect the power from the PCM or disconnect the batteries.

96 F250 XLT 4x4, 4:10 gears, 5 speed, Tymar intake and HX hose, downpipe, pyro and boost guages, coolant filter, Luc clutch
Bugman is offline  
post #3 of 3 (permalink) Old 01-29-2019, 12:52 AM
PSN Veteran
 
Patrick Feeley's Avatar
 
Join Date: Mar 2008
Location: Tehachapi, CA
Posts: 2,788
Re: Trouble Codes

For P0238 see the appropriate pinpoint test (KOEO or Continuous):

D15 KOEO DIAGNOSTIC TROUBLE CODE (DTC) P0238
DTC P0238 indicates turbo boost sensor A circuit high input.
Possible causes:
damaged MAP sensor
damaged PCM
Disconnect MAP sensor connector.
Connect the MAP sensor tester between the vehicle harness connector and the MAP sensor.
Insert the MAP sensor tester banana plug into a digital multimeter. Set digital multimeter to frequency scale.
Key on/engine off.
Is frequency reading above 125 hz?
Yes REPLACE MAP sensor. CLEAR DTCs and RETEST.
No REPLACE PCM. CLEAR DTCs and RETEST.



D24 CONTINUOUS DIAGNOSTIC TROUBLE CODE (DTC) P0238
DTC P0238 indicates turbo boost sensor A circuit high input. This code was set under normal driving conditions.
Possible causes:
damaged MAP sensor
damaged circuit
Disconnect MAP sensor connector.
Connect MAP sensor tester between the vehicle harness connector and MAP sensor.
Insert MAP sensor tester banana plug into a digital multimeter.
Set digital multimeter to frequency scale.
Key on, engine off.
Observe frequency reading while tapping on sensor.
Does frequency reading go above 125 hz?
Yes REPLACE MAP sensor. CLEAR DTCs and RETEST.
No GO to D25 .

D25 CHECK MAP SENSOR
Apply 69 kPa (10 psi) of pressure with vacuum/pressure pump from Rotunda Pressure Adapter Kit 014-00761 or equivalent. Observe frequency reading while tapping on sensor.
Does frequency reading go above 300 hz?
Yes REPLACE MAP sensor. CLEAR DTCs and RETEST.
No GO to D26 .

D26 MAP HARNESS CHECK
Using a vacuum pump from Rotunda Pressure Adapter Kit 014-00761 or equivalent, apply 33 kPa (10 in-Hg) of vacuum. Observe frequency reading while performing the following:
Grasp the vehicle harness close to the sensor connector.
Wiggle and shake the vehicle while working toward the PCM.
Does frequency reading go above 300 hz?
Yes REPAIR intermittent circuit failure. CLEAR DTCs and RETEST.
No FAILURE is intermittent. Unable to duplicate at this time. CLEAR DTCs.

Cheers!

97 F250 SC 4x4, E4OD, 4.10 LS, Basically Stock, Relocated Block Heater Plug, Ext Trans Filter, Tru-Cool Max, I/C Mounted but not Plumbed

SOLD: 94 F350 CC DRW PSD, 5 Speed, 4.10 LS, SBC Con-O, Baldwin Filter, Tymar HPX Hose, 3Ē DP, Bilsteins, $12 AIC, Coolant Filter, Explorer O/H Console, Trans Temp, Boost, and Pyro, Pedestal Mod, Gutted EBPV
Patrick Feeley is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the PowerStrokeNation : Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome