Pinpoint Test AE : DTC P27B4, P27B5, P27B6
WARNING: This page is about a different car, the 2021 Ford Police Interceptor Utility. However, it is still accessible from the selected car via links, so may be relevant.
- Normal Operation and Fault Conditions
The PCM monitors clutch engagements and when a fault occurs a DTC is set in memory.
DTC Fault Trigger Conditions
DTC Description Fault Trigger Condition PCM P27B4:00 Internal Control Module Transmission Gear Direction Control Performance: No Sub Type Information The DTC sets if PCM detects clutch faults that tie-ups, a software error or speed sensor fault. PCM P27B5:00 Internal Control Module Transmission Gear Ratio Control Performance: No Sub Type Information The DTC sets if PCM detects clutch faults, or software errors. PCM P27B6:00 Internal Control Module Transmission Speed Sensor Performance: No Sub Type Information The DTC sets if PCM detects clutch faults, a speed sensor fault or software error. Possible Sources
- Clutch faults that cause an engagement in N, R, or a forward gear in R, reverse in a forward gear, or clutch tie up
- Software error
- AE1 CHECK CORRECT GEAR STATE IS ACHIEVED
- Ignition ON.
- Using a diagnostic scan tool, monitor the PID, Transmission Range (TR) Sensor Position - Corrected.
- Select DRIVE.
Does the achieved gear range match the customer selected gear position?
Yes GO to AE2 No GO to Pinpoint Test C - AE2 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS)
- Ignition ON.
- Using a diagnostic scan tool, clear the DTC for the PCM.
- Wait 10 seconds.
- Using a diagnostic scan tool, carry out the PCM self-test.
Does DTC P27B4, P27B5, P27B6 return?
Yes If any TR sensor DTCs are set resolve them first. If DTC P27B4, P27B5, P27B6 return by itself, Refer to PCM GUIDED ROUTINE TESTING .
After programming the new PCM, CARRY OUT the transmission strategy download. REFER to: Transmission Strategy Download .No The fault may be intermittent.