P1101: MAF Sensor Out Of Self Test Range./KOER Not Able To Complete KOER Aborted
What Does P1101 Mean?
P1101 is a diagnostic trouble code indicating: MAF Sensor Out Of Self Test Range./KOER Not Able To Complete KOER Aborted. This code relates to the manufacturer-specific powertrain system. It has been reported in NHTSA complaints across 3 different vehicle models.
Symptoms of P1101
- ⚠️ Check engine light illuminated
- ⚠️ Engine misfires
- ⚠️ Loss of engine power
- ⚠️ Jerking or surging while driving
- ⚠️ Vehicle enters limp/reduced power mode
Common Causes
- 🔍 Throttle body or throttle position sensor issue
- 🔍 Dirty or failed MAF sensor
- 🔍 Failed PCV valve
- 🔍 Wiring or connector problem
- 🔍 Turbocharger or boost system issue
- 🔍 Sensor or control module malfunction
P1101 Reports by Year
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"SEVERAL TIMES A WEEK MY CAR WILL SUDDENLY GO INTO "ENGINE POWER REDUCED" MODE AND GO INTO LOW SPEED. IF I GET OUT OF THE CAR, LOCK IT, AND UNLOCK IT 30 SECONDS LATER IT WILL RESET AND THEN BE OKAY FOR A FEW MINUTES. THIS POWER REDUCTION IS EXCEEDINGLY DANGEROUS WHEN MOVING AT HIGHWAY SPEEDS AND SUDD"
— Chevrolet Malibu owner, 01/01/2021
"'TAMARA RECALL' I WAS DRIVING TO WORK WHEN MY CHECK ENGINE LIGHT CAME ON AND A WARNING SAID 'ENGINE POWER LOSS' AND MY CAR SLOWED DOWN TO 40MPH, I WAS ON THE HIGHWAY, SPEED LIMIT OF 65, I ALSO GOT AND EMAIL SAYING THERE WAS A PROBLEM WITH MY ENGINE AND TRANSMISSION SYSTEM, I TOOK IT IN TO BE LOOKED "
— Chevrolet Malibu owner, 02/04/2019
"Last year I started getting the dreaded shift to park issue. Takes usually about 30 seconds to realize its in park, even though the dashboard days its in park. WHY is there no recall? I see hundreds of thousands of complaints for this. Plus im constantly getting the P1101 code. I know this is a comm"
— Chevrolet Malibu owner, 11/30/2025
Source: NHTSA Complaints Database
Most Reported Vehicles for P1101
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | CHEVROLET MALIBU | |
| 2 | CHEVROLET CRUZE | |
| 3 | GMC TERRAIN |
P1101 Reports by Vehicle
Detailed NHTSA complaint analysis for each vehicle model.
Frequently Asked Questions
Can I drive with this code?
Will this code clear itself?
How do I find the exact cause?
What To Do Next
Possible Fixes
- 🔧 Have the code scanned with a professional-grade scanner to read freeze frame data
- 🔧 Test the relevant sensor(s) with a multimeter before replacing
- 🔧 Inspect wiring harness and connectors for damage, corrosion, or loose connections
- 🔧 If DIY repair isn't feasible, get a diagnostic from a trusted mechanic ($50-150)
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1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
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3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.