Having problems with your 2005 Ford Freestar ?

Engin light is on when i check it by computer it gives me error P1336 [25,10,13,36] , please refer to relevant terchnical manual

Posted / edited by AnonymousUser on : 15-01-2018

Answers :

The crankshaft position (CKP) system variation learn feature is used to \015\012calculate reference period errors caused by slight tolerance variations \015\012in the crankshaft, and the CKP sensors. The calculated error allows the \015\012powertrain control module (PCM) to accurately compensate for reference \015\012period variations. This enhances the ability of the PCM to detect \015\012misfire events over a wider range of engine speed and load.

The code P1336 is for a Crankshaft (CKP) and/or Camshaft (CMP) position \015\012sensor input signal to PCM concert. It is triggered if the input signal\015\012 to the PCM for either of these sensors is erratic. Per the factory \015\012service manual, this can be due to:
\015\012- a damaged PCM
\015\012- damaged CKP sensor
\015\012- damaged CMP sensor
\015\012- base engine
\015\012- harness concerns.
\015\012
\015\012The service manual suggests checking the following items:
\015\012- harness routings,
\015\012- alterations,
\015\012- improper shielding,
\015\012- or electrical interference from other improperly functioning systems.
\015\012
\015\012To properly check the operation of the CMP and CKP, you'll really need \015\012an oscilloscope. The code is probably being triggered due to a faulty \015\012sensor or connection and not something that just needs to be reset.

Step / Action / Yes / No

1. Did you perform the Diagnostic System Check-Engine Controls?
Yes: Go to Step 2
No: Go to Diagnostic System Check - Engine Controls

2. Preform the CKP system variation learn procedure. Refer to CKP System Variation Learn Procedure. Did you complete the action?
Yes: Go to Step 3
No: Go to Diagnostic Aids

3. Clear the DTCs with a scan tool.
Turn OFF the ignition.
Start the engine.
Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC run and pass?
Yes: Go to Step 4
No: Go to Step 2

4. With a scan tool observe the stored information, Capture Info.
Does the DTC run and pass?
Yes: Go to Diagnostic Trouble Code (DTC) List
No: System OK


Diagnostic Aids:
The CKP system variation values are not stored in the PCM memory after a learn procedure has been performed. If the actual CKP variation is not within the CKP system variation compensating values stored in the PCM, DTC P0300 may set.

The CKP system variation learn procedure is also required when the following service procedures have been performed, regardless of whether DTC P1336 is set.
An engine replacement
A PCM replacement
A harmonic balancer replacement
A crankshaft replacement
Any engine repairs which disturb the CKP sensor relationship

If the CKP system variation learn procedure cannot be performed successfully, check for the following conditions and correct as necessary:
A damaged reluctor wheel
Excessive crankshaft runout
A damaged crankshaft
Interference in the signal circuit of the CKP sensor
A coolant temperature that is not within the Conditions For Running the DTC
The ignition switch is in the ON position until the battery is drained
A PCM power disconnect with the ignition ON may erase the stored value and set the DTC P1336

Hope helps.
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