NHTSA ID Number: 11028356
Manufacturer Communication Number: IK1201291
TSB/Document Date: 2026-02-05
Summary
This document will guide the user through Mass Air Flow (MAF) calibration procedure
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Language:
CANADA, UNITED STATES
ISIS, Bus ISIS, FleetISIS,
NotSIR
Document ID: IK1201291
Revision:
6
ENGINE
Created:
Last
Modified:
4/23/2015
Author:
Marcelo
Sahagun
English
Other Languages: NONE
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1/16/2026
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Title : MAF Calibration Failure - DTC 132-14
Applies To : 2010 MY Emissions MF 7, 9, 10, DT, N9, and N10
CHANGE LOG
Please refer to the change log text box below for recent changes to this article:
01/16/2026 Changes to the "Applies to" section to add MF 9, 10, and DT
04/21/2020 - Author changed. Replaced SRTs with link to SRT Manual site
12/5/2018- Author updated after feedback review. No changes made
10/5/15 - Added OBFCT
04/23/2015 - 1st Draft
DESCRIPTION
This document will guide the user through Mass Air Flow (MAF) calibration procedures.
SYMPTOM(s)
•
•
•
•
MAF sensor Calibration Failed fault code after MAF Calibration procedure
Low power
Misfiring
Diagnostic Trouble Code(s) & Dashboard Indicator Light(s):
DTC/Light
Description
SPN 132 FMI 14
MAF sensor Calibration Failed
Customer Observations or Concerns:
Generally there is no Customer complaint as this fault is triggered when attempting to perform a MAF calibration
SPECIAL TOOL(s) / SOFTWARE
Tool Description
EST with ServiceMaxx
Tool Number
Comments
Instructions
EST to vehicle
interface
SERVICE PARTS INFORMATION
Kit Description
Part Number
Quantity
Notes
Required
N/A - no parts necessary for procedure
DIAGNOSTIC STEP(s)
Step Action
Does fault code 132-14 come active after MAF calibration attempt?
#1
Yes. Go to Step 2
No. Repair complete
Step Action
#2
Decision
Entry conditions must be met to perform MAF Cal:
- Must run KOER Standard Test first
- Engine Coolant Temperature 1 (above 176 F)
- Engine Oil Temperature (above 176 F)
- Engine Speed (Low Idle Speed)
- Accelerator Pedal Position (0%)
- Brake Switch (Released)
- Parking Brake Switch (Set)
** Only calibrate the MAF if one of the following conditions occurred:
- SPN 132 FMI 13 is set
- ECM calibration update
- Repair MAF sensor or circuit fault
- Repair IMP sensor or circuit fault
- Repair IMT sensor or circuit fault
- Replacement of DPF or DOC
- Repair of the Intake Air System
Decision
Yes. Go to Step 3
- Repair of the CAC system
- Repair or replacement of Turbocharger
- Repair or replacement of Engine Throttle Valve
- Repair or replacement of EGR valve
- Repair base engine (Cylinder head, Pistons, camshaft)
- Engine replacement or rebuild
No. Repeat Step 2
** MAF Calibration Pre-checks:
- No Active fault codes, other than the SPN 132 FMI 13
- MAF and IMP are within KOEO specification
- DPF Status = Regen Not Needed
- No leaks in the Intake Air System
- No leaks in Exhaust system
- No shop exhaust hose attached
- No engine performance issues
- No engine misfire issues
- Transmission in Park or Neutral
- Clutch disengaged
- Engine Fan is off
- PTO is disabled
- Air Conditioning is off
- Accelerator Pedal not depressed
- Close Engine Hood
Have all entry conditions been met?
Step Action
•
•
•
•
Run engine to operating temp.
Turn engine off.
Remove fan belt.
If equipped, remove PTO, Air compressor, Dual A/C compressor and wheel
chair lift belt.
• Run engine and perform Standard Test.
• Run the MAF calibration.
• Once complete you will be prompted to cycle the key.
Decision
Yes. Go to Step 4
NOTE: Make sure you cycle ignition off for at least 30 seconds.
This will prevent ghost over-boost faults from coming active.
#3
• Reinstall belt(s), clear codes.
No. Repair complete
Is fault code 132-14 active?
Step Action
#4
•
•
•
•
•
Run engine to operating temp.
Perform an OBFCT.
Turn engine off.
Remove fan belt.
If equipped, remove PTO, Air compressor, Dual A/C compressor and wheel
chair lift belt.
• Run engine and perform Standard Test.
• Run the MAF calibration.
• Once complete you will be prompted to cycle the key.
Decision
Yes. Review with Lead or Senior Tech.
Do not open a case file unless all
resources within the Dealership
have been exhausted.
NOTE: Make sure you cycle ignition off for at least 30 seconds.
This will prevent ghost over-boost faults from coming active.
• Reinstall belt(s), clear codes.
Is fault code 132-14 active?
REPAIR STEP(s)
N/A
WARRANTY INFORMATION
Warranty Claim Coding:
Group: 12000 - Engines
Noun: 993 - Sensor, Mass Air Flow (Chassis Mounted)
Standard Repair Time(s):
Refer to the SRT Manual for Repair Times
OTHER RESOURCES
MaxxForce 7 Diagnostic Manual
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Copyright © 2026 Navistar
, Inc.
No. Repair complete
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TSB/Document ID: IK1201291
Replacement Service Bulletin Number:
MFR Communication Date: 2026-01-16
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
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