P111A on Mazda
On Mazda, the engine coolant temperature has gone above its limit
Severity: Inspect soon
High coolant temperature can damage the engine; owners report limp mode and a cracked cylinder head with this code, and Mazda notes weak heat and a hot warning light.
It gets more serious if:
- Stop: Stop driving and let the engine cool if the high temperature warning is on, the car goes into limp mode or coolant is leaking.
This page covers only what differs on Mazda. For what P111A means, the ranked causes and the test order, see the P111A guide.
What's different on Mazda
MazdaYour car
2014–2015 · Mazda3
Supported by vehicle dataMazda 01-022-15-3083 ties P111A and a high temperature light in extreme cold to the factory coolant concentration. Whether the bulletin is still current is not verified.
2019–2020 · CX-5
Supported by vehicle dataMazda 01-007-20-3691 ties P111A with overheating and weak A/C to cooling fan control software. Whether the bulletin is still current is not verified.
2018–2019 · CX-9
Supported by vehicle dataOwners report P111A with limp mode at 251.6 F (2019) and a coolant leak with a cracked cylinder head (2018).
01-022-15-3083Status unverified
High coolant temperature warning with P111A in extreme cold
2014–2015mazda3 · NHTSA 10101461
Names P111A:00 as engine coolant temperature high; the production coolant concentration may not have been set correctly.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
01-007-20-3691Status unverified
Overheating and weak A/C with P111A
2019–2020cx-5 · NHTSA 10174569
Names P111A:00 as engine coolant temperature high; improper control module software may make the cooling fan run improperly.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
Sources and review
- Mazda 01-022-15-3083 (NHTSA 10101461): 2014-2015 Mazda3 high coolant temperature warning with P111A
- Mazda 01-007-20-3691 (NHTSA 10174569): 2019-2020 CX-5 overheating and weak A/C with P111A
- NHTSA complaint ODI 11690498: Mazda CX-9 2019, P111A at 251.6 F with limp mode
- NHTSA complaint ODI 11481366: Mazda CX-9 2018, P111A engine overheated DTC with coolant leak
- 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