Bobcat M1210 (12-10) Fault Code: MAF Temperature High
Also shown on the panel as 12-10
MAF Temperature High · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
M1210 sets on the Bobcat T770 when the gateway controller sees the engine controller reporting a MAF (mass air flow) temperature of 178°F held for 30 seconds. When it sets, the engine automatically de-rates by 10 percent until the condition clears.
High severity. This code triggers an automatic 10 percent engine de-rate, so the machine will lose power on its own. It is not an immediate shutdown risk, but running with reduced power and high intake air temperature over time can point to a cooling or sensor problem that deserves attention the same shift.
What does Bobcat error code M1210 mean?
M1210 is the Bobcat T770's way of flagging that the mass air flow sensor is reporting an intake air temperature the gateway controller considers too high, specifically 178°F sustained for 30 seconds. The MAF sensor measures the temperature and volume of air entering the engine so the ECU can calculate the correct fuel and boost delivery.
When intake air runs hot, combustion efficiency drops and engine components see more thermal stress. To protect the engine, the controller automatically cuts power by 10 percent as soon as this code sets. That de-rate stays in effect until the reported temperature comes back down.
The code requires the key switch or run/enter switch to be on and the engine running before it can set. It is listed as self resetting, meaning no separate manual clearing procedure is needed once the underlying condition goes away.
What triggers a Bobcat M1210 code?
The gateway controller sets M1210 when the engine controller reports a MAF temperature of 178°F for 30 seconds continuously, with the key switch (or run/enter) on and the engine running.
Common causes of M1210
- High ambient temperature combined with extreme working conditions, which can push intake air temperatures up naturally.
- Contamination in the cooling system, which reduces the system's ability to keep engine and intake temperatures in check.
- A failing MAF temperature sensor reporting an inaccurate high reading.
- A fault in the ECU controller itself.
- A fault in the gateway controller.
- Moisture, corrosion, or pushed-back pins in the gateway controller connectors, the engine harness, or the mainframe harness.
- An intermittent condition: if the code is not active at the time of testing, the root cause may involve loose connections, corrosion, pushed-back pins, a controller fault, wire harness damage, or a combination of these, and may not be found on that test attempt.
How to troubleshoot Bobcat M1210: first checks
- Check the cooling system for contamination, low coolant, debris in the radiator or cooling fins, and confirm normal airflow across the cooler package.
- Inspect the MAF sensor's wiring and connector for moisture, corrosion, or pushed-back pins, and confirm the connector is fully seated.
- Trace and inspect the engine harness and mainframe harness between the MAF sensor, engine controller, and gateway controller for chafing, corrosion, or loose pins.
- Consider recent working conditions: if the machine was working hard in high ambient heat, let it cool and see if the code and de-rate clear on their own before assuming a component failure.
- If the code is intermittent, wiggle-test connectors at the gateway controller, engine harness, and mainframe harness while monitoring for the code re-triggering.
- Verify the MAF sensor is reading plausible values compared to ambient conditions using diagnostic software, if available, to isolate a sensor fault from a true high-temperature condition.
How the code clears
M1210 is self resetting. No separate manual clearing procedure is listed. Once the MAF temperature reported by the engine controller drops back below the threshold, the code and the associated 10 percent engine de-rate should clear on their own.
Affected models and serial ranges
M1210 appears in our records across 1 Bobcat models. Match your machine by model and serial number.
| Model | Serial ranges |
|---|---|
| T770 | SN A3P811001-899999 |
Frequently asked questions
What does Bobcat code M1210 mean?
It means the gateway controller detected the engine controller reporting a mass air flow (MAF) temperature of 178°F for 30 seconds. This is specific to the Bobcat T770.
Why did my Bobcat T770 lose power with code M1210?
Once M1210 sets, the engine automatically de-rates by 10 percent to protect itself from the high intake air temperature condition. This power loss is expected behavior tied to the code, not a separate malfunction.
Do I need to manually clear M1210?
No. It is listed as self resetting. Once the reported MAF temperature drops back down, the code and the de-rate should clear without any reset procedure.
Can hot weather alone cause this code?
Yes. High ambient temperature combined with extreme working conditions is listed as a possible cause, so working hard in hot weather can trigger it even with no component failure.
What parts should be checked first for M1210?
Start with the cooling system for contamination, then inspect the MAF temperature sensor and its wiring, and check the gateway controller connectors, engine harness, and mainframe harness for moisture, corrosion, or pushed-back pins.
Why can't my technician find the cause of M1210?
If the code is intermittent and not active during testing, the cause may not be found right away. Likely culprits in that case include loose connections, corrosion, pushed-back pins, a controller fault, or harness damage, alone or in combination.
Is M1210 an emergency stop situation?
It is not listed as requiring an immediate shutdown, but the automatic 10 percent de-rate signals a real thermal condition. Treat it as a same-shift diagnostic priority rather than something to ignore.