Page 251 - The Central Motor Vehicles Rules, 1989

RULE 115 THE CENTRAL MOTOR VEHICLES RULES, 1989 223

(iii) OBD Stage II-B Thresholds for BS-VI vehicles manufactured on or after
1st April, 2025:
TABLE 5B:
BS-VI: OBD STAGE II-B: EMISSION THRESHOLDS

Sr. Engine CO NMHC NOx PM
No. (mg/km) (mg/km) (mg/km) (mg/km)
(1) (2) (3) (4) (5) (6)
(a) Positive 1900 250 300 50 (1)
Ignition (PI)
(b) Compression 1900* 320 540 50
Ignition (CI)
(1)
Positive ignition (PI) engine, applicable only to vehicles with gasoline direct injection
engines

TABLE 6:
OBD II MONITORING ITEMS

Sr. Monitoring Items OBD Stage II-A OBD Stage II-B
No. (if equipped/where fitted) 1st April, 2023 1st April, 2025
(1) (2) (3) (4)
a. All emission related power train components: Ö Ö
electric circuit Malfunctions (Circuit continuity +
Circuit rationality)
b. Distance travelled since MIL (Malfunction Ö Ö
indicator lamp) ON
c. Electrical disconnection of Electronic evaporative Ö Ö
purge control device
d. Catalytic converter monitoring x Ö

e. EGR system monitoring Ö Ö
f. Misfire detection for PI vehicle Ö Ö
g. Oxygen sensor deterioration Ö Ö
h. Particulate filter Ö Ö
i. Particulate matter (PM) monitoring. Ö Ö ]