These instructions apply to the Dodge Magnum Mk1 (LX) 2005-2008.
For other models, please choose your vehicle here.
The Dodge Magnum (LX, 2005–2008) uses a tyre-pressure monitoring system (TPMS) that warns you when a tyre is low. There is no button or scan tool to reset it — once you correct the pressures and drive, the system relearns on its own. Here is how to clear the light properly.
Before You Begin
- Read the recommended cold pressures on the placard in the driver’s door opening — front and rear figures can differ.
- Check pressures cold (parked 3+ hours, or driven less than a mile) with an accurate gauge.
- Inspect the valves and fit sound caps to keep moisture out.
How to Clear the Warning
- Set all four tyres to the placard pressure.
- Start the engine and drive above 15 mph (25 km/h) for a few minutes — up to about ten minutes is usually enough for the sensors to report.
- Watch the cluster: the low-pressure telltale switches off once every wheel reads an acceptable pressure.
If the Light Will Not Clear
- Steady light after a drive: re-check all four with a gauge — a small shortfall on one wheel keeps it lit. Top up and drive again above 15 mph.
- “Check TPM System” message or a flashing telltale: the system is missing data or has a fault. Drive a few minutes after setting pressures; if it keeps returning, a sensor battery may be weak (TPMS sensors last roughly 7–10 years).
- After a rotation or a new tyre: no extra steps — the Magnum relearns during the drive cycle.
Good to Know on the Wagon
Some Magnum builds do not monitor the spare, so a low spare will not trigger the warning — keep it at spec anyway, especially with a loaded cargo area. Cold mornings routinely trip the light because pressure falls with temperature; top up to the placard figure while the tyres are cold rather than chasing the light. You can switch the display between PSI, kPa and BAR in the personal-settings menu so your gauge and the dash agree.
Frequently Asked Questions
Is there a TPMS reset button on the Magnum? No — it relearns automatically as you drive. There is no owner button and no scan-tool step for normal use.
I set the pressures but the light stayed on. Drive above 15 mph for a few minutes so the sensors report; if it stays on, one tyre is probably still off, or a sensor is faulty.
What does a flashing TPMS light mean? A system fault rather than simple low pressure — commonly a sensor with a flat internal battery, which needs replacing.
Do I need to reset anything after fitting new tyres? No — just set the pressures and drive; the relearn happens on its own.
If a TPMS fault message keeps returning, or another light is on, look the code up on our sister site autodtcs.com.
Independent guide — not affiliated with Dodge. Always follow your official service manual and safety precautions. Read our full disclaimer.