Just had four (4) new tyres fitted together with new TPM's on 2012 1.6 petrol. New monitors have same part/serial nos. as originals. Low pressure warning display is now evident and intermittent (dash warning was previously displayed for around 2 years as tyres were very old and assumed TPM batteries were flat). Can the TPMS now be reset without a scan tool or will the TPMS eventually relearn itself?