P1101 on Buick
On GM and GM-era Saab engines, the airflow worked out from throttle position doesn't match the airflow measured by the MAF and MAP sensors
Severity: Inspect soon
An air leak or sensor error upsets fuelling and, on some GM turbo engines, triggers a Reduced Engine Power message. It usually isn't an emergency, but a steady check engine light should be inspected promptly.
This page covers only what differs on Buick. For what P1101 means, the ranked causes and the test order, see the P1101 guide.
What's different on Buick
BuickYour car
2013–2022 · Encore
Supported by vehicle dataSeveral GM bulletins: air cleaner housing, whistle at start-up and oil leaks with P1101. Whether the bulletins are still current is not verified.
2013–2019 · Regal
Supported by vehicle dataReduced Engine Power with P1101 from a damaged charge-air cooler O-ring. Whether the bulletin is still current is not verified.
2013 · Verano
Supported by vehicle dataLoose air duct clamps can set P1101 with P0171 or P0101. Whether the bulletin is still current is not verified.
18-NA-333Status unverified
MIL, whistle noise at startup and P1101 (Encore)
2018–2019encore · issued · NHTSA 10163889
MIL on, whistle noise at start-up and P1101.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
PIP5402EStatus unverified
P015B or Reduced Engine Power with P1101: check charge air cooler coupler O-ring
2013–2019regal, envision, verano · issued · NHTSA 10167456
P015B, or a Reduced Engine Power message with P1101: look for a missing or damaged charge-air cooler coupler O-ring. Also Chevrolet, Cadillac and GMC turbo models.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
PIP5240FStatus unverified
P0171 and/or P1101: inspect air cleaner housing (Encore, Trax)
2013–2019encore · issued · NHTSA 10163679
MIL with P0171 and/or P1101: inspect the air cleaner housing and replace it if it lacks the correct content. Also Chevrolet Trax.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
PI0931Status unverified
SES light with P0171, P1101 and/or P0101: inspect and tighten air duct clamps (Verano)
2013verano · issued · NHTSA 10134661
Check engine light with P0171, P1101 and/or P0101: inspect and tighten the air duct clamps.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
Sources and review
- PIP5240F: P0171 and/or P1101: inspect air cleaner housing (Encore, Trax)
- 18-NA-333: MIL, whistle noise at startup and P1101 (Encore)
- 20-NA-047: Front or rear crankshaft oil leak with MIL and P1101
- PIP5402E: P015B or Reduced Engine Power with P1101: check charge air cooler coupler O-ring
- PI0931: SES light with P0171, P1101 and/or P0101: inspect and tighten air duct clamps (Verano)
- 2023 Integra Owner's Manual: Indicator, Coming On/Blinking
- DTC P0068 or P1101 (2011 Saab 9-4X, V6 engine management)
- Last reviewed
- Written by
- Saurabh K.
- Editorial review
- Pending
- Technician review
- Technician review pending
This page explains what a code usually means; it is not a substitute for a professional inspection. How we source and review · Report an error