Various Concerns With Active Exhaust System – 2018-2022 Ford Mustang

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NHTSA ID Number: 10236033

Manufacturer Communication Number: TSB 23-2132

Summary

Some 2018-2023 MustangeBay vehicles (non-Shelby GT-350) may exhibit various concerns with the active exhaust system. These may include Exhaust Mode Selection Not Available messages, and/or illuminated malfunction indicator lamp (MIL) with diagnostics trouble codes (DTCs) P26C5, P26C6, P26FE, P2BF9, P2BFB, P26C7, P2BF5, P2BF8, P2BFD and/or P2BFA. This may be due to an improperly seated exhaust system. To correct the condition, follow the Service Procedure to diagnose the tailpipe actuator.

 


This bulletin supersedes 22-2282.

Model:

FordeBay

2018-2023 MustangeBay

non-Shelby GT350

 

Summary

This article supersedes TSB 22-2282 to update the vehicle models affected.

Issue: Some 2018-2023 MustangeBay vehicles (non-Shelby GT-350) may exhibit various concerns with the active exhaust system. These may include Exhaust Mode Selection Not Available messages, and/or illuminated malfunction indicator lamp (MIL) with diagnostics trouble codes (DTCs) P26C5, P26C6, P26FE, P2BF9, P2BFB, P26C7, P2BF5, P2BF8, P2BFD and/or P2BFA. This may be due to an improperly seated exhaust system. To correct the condition, follow the Service Procedure to diagnose the tailpipe actuator.

Action: Follow the Service Procedure to correct the condition on vehicles that meet all of the following criteria:

  • 2018-2023 MustangeBay (non-Shelby GT-350)
  • Exhibit concerns with the active exhaust system, including but not limited to:
    • Drive Mode Not Available message in the instrument panel cluster (IPC).
    • Exhaust Mode Not Available message in the IPC.
    • Illuminated MIL with DTCs P26C5, P26C6, P26FE, P2BF9, P2BFB, P26C7, P2BF5, P2BF8, P2BFD and/or P2BFA.

 

Parts

Service Part NumberQuantityDescriptionUnit of IssuePiece Quantity
W520111-S4241Exhaust Actuator Nuts43
W711687-S3001Rear Underbody Shield Tree Fastener42
W718128-S4172Rear Underbody Shield Push Pin Fastener46

 

Parts

Parts To Inspect And Replace Only If Necessary

Service Part NumberQuantityDescriptionUnit of IssuePiece Quantity
KR3Z-14A411-GIf NeededExhaust Actuator Harness – GT500/Mach 111
JR3Z-14A411-HIf NeededExhaust Actuator Harness – 2.3L/5.0L11
JR3Z-6554-AIf NeededExhaust Actuator Service Kit11
KR3Z-5230-PIf NeededMuffler and Tailpipe Assembly – GT50011
JR3Z-5230-FCIf NeededMuffler and Tailpipe Assembly – 5.0L11
KR3Z-5230-HIf NeededMuffler and Tailpipe Assembly – 2.3L11
KR3Z-5230-MIf NeededMuffler and Tailpipe Assembly – 5.0L Bullitt11
MR3Z-5230-CIf NeededMuffler and Tailpipe Assembly – 5.0L Mach 1 (A)11
MR3Z-5230-EIf NeededMuffler and Tailpipe Assembly – 5.0L Mach 1 (B)11
BR3Z-5A231-B Various Concerns With Active Exhaust System - 2018-2022 Ford Mustang | small lightIf NeededExhaust Clamp – 2.3L12
FR3Z-5A231-AIf NeededExhaust Clamp – 5.0L21

Quantity refers to the amount of the service part number required to repair the vehicle.

Unit of Issue refers to the number of individual pieces included in a service part number package.

Piece Quantity refers to the total number of individual pieces required to repair the vehicle.

If Needed indicates the part is not mandatory.

 

Service Procedure

1. Are DTCs P26FE or P2BFB present?

(1). Yes โ€“ proceed to Step 2.

(2). No โ€“ proceed to Step 5.

2. Using the appropriate FordeBay diagnostic scan tool, access datalogger, and view the PCM Parameter Identifications (PIDs). Monitor the EFCV_A_MON_STAT PID while active commanding the PID EFCV_A_CMD PID. Open the tailpipe actuator in 10% increments until it has reached 100% (fully open). Close the tailpipe actuator in 10% increments until it has reached 0% (fully closed). Does the EVCA_A_MON_STAT PID display a mechanical fault at any point?

(1). Yes โ€“ proceed to Step 3.

(2). No โ€“ proceed to Step 5.

3. Remove the exhaust actuator and inspect for physical binding and/or blockage and repair as necessary. Refer to Workshop Manual (WSM), Section 309-00C.

4. Is the concern still present?

(1). Yes โ€“ proceed to Step 5.

(2). No โ€“ repair is complete.

5. Inspect the muffler and tailpipe assembly and both catalytic converters for proper positioning of the exhaust clamps securing them together. Make sure the exhaust clamp locking tab is fully engaged to the catalytic converters (Refer to Figure 1). Make sure the knurled/ridge area of the muffler and tailpipe assembly are covered by the exhaust clamps (Refer to Figures 2-3). Adjustments can be made by loosening the exhaust clamps and repositioning the muffler and tailpipe assembly. (Figures 1-3)

Figure 1 – Exhaust clamp locking tabs.

 

Figure 2 – Non-GT500 exhaust with ridge.

 

Figure 3 – GT500 exhaust with knurled area.

 

6. Inspect the exhaust actuator wiring harness for signs of damage. If damage is found, replace the exhaust actuator wiring harness (service base PN: 14A411).

Figure 4 – GT500 shown, other vehicles similar

 

7. If the concern persists, continue with normal diagnostics found in WSM, Section 309-00C.

 


6 Affected Products

Vehicle

MAKEMODELYEAR
FORDeBayMUSTANGeBay2018-2023

 


1 Associated Document

Manufacturer Communications

23-2132
03 May 2023

MC-10236033-0001.pdf 566.523KB

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NHTSA ID Number: 10225443

Manufacturer Communication Number: TSB 22-2282

Summary

Some 2018-2022 MustangeBay vehicles (non-Shelby GT-350) may exhibit various concerns with the active exhaust system. These may include Drive Mode Not Available or Exhaust Mode Not Available messages, and/or illuminated malfunction indicator lamp (MIL) with diagnostics trouble codes (DTCs) P26C5, P26C6, P26FE, P2BF9, P2BFB, P26C7, P2BF5, P2BF8, P2BFD and/or P2BFA. This may be due to an improperly seated exhaust system. To correct the condition, follow the Service Procedure to diagnose the tailpipe actuator.

 

1 Associated Document

Manufacturer Communications

22-2282
03 October 2022

MC-10225443-0001.pdf 206.309KB

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NHTSA ID Number: 10211711

Manufacturer Communication Number: TSB 22-2153

Summary

This article supersedes TSB 21-2011 to update the vehicle model years affected and Service Procedure. Some 2018-2022 MustangeBay vehicles may exhibit various concerns with the active exhaust system. These may include Drive Mode Not Available or Exhaust Mode Not Available messages, and/or illuminated malfunction indicator lamp (MIL) with diagnostics trouble codes (DTCs) P26C5, P26C6, P26FE, P2BF9, P2BFB, P26C7, P2BF5, P2BF8, P2BFD and/or P2BFA. This may be due to an improperly seated exhaust system. To correct the condition, follow the Service Procedure to diagnose the tailpipe actuator.

 

1 Associated Document

Manufacturer Communications

22-2153
03 May 2022

MC-10211711-0001.pdf 203.474KB

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NHTSA ID Number: 10189765

Manufacturer Communication Number: TSB 21-2011

Summary

Some 2020 MustangeBay GT500 vehicles built on or before 28-Aug-2020 may exhibit various concerns with the active exhaust system. These may include “Drive Mode Not Available” or “Exhaust Mode Not Available” messages, and/or diagnostic trouble codes (DTCs) P26C5, P26C6, P26FE, P2BF9, P2BFB, P26C7, P2BF5, P2BF8, P2BFD, and/or P2BFA. This may be due to pinched wiring or a misaligned bracket where the exhaust actuator mounts. To correct the condition, follow the Service Procedure to make sure that the exhaust is seated correctly.

 

1 Associated Document

Manufacturer Communications

21-2011
25 March 2021

MC-10189765-0001.pdf 658.873KB

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