APPENDIX D
Manufacturers Known to Have OBD Readiness Issues
1996 Chrysler vehicles - Vehicles may clear readiness at key-off. Vehicles should be tested
normally. If vehicles are found to be “Not Ready,” they should be referred to a qualified
service provider so the OBD software can be updated.
1996 - 1998 Mitsubishi vehicles - These vehicles may have a high degree of “Not Ready” for
catalyst monitor due to a “trip based” design. Mitsubishi has provided driving cycles in its
service information to allow monitors to operate. These vehicles should be scanned for MIL
illumination without regard to readiness status.
1996 Nissan vehicles and 1997 Nissan 2.0 liter 200SX - These vehicles may have a high
degree of “Not Ready”for catalyst and evaporative monitors due to a “trip based” design.
Nissan has provided driving cycles in its service information to allow monitors to operate.
These vehicles should be treated as other non-problematic vehicles. Nissan Technical
Service Bulletin #NTB98-018, February 18, 1998.
1996-98 Saab vehicles - These vehicles may have a high degree of “Not Ready”for catalyst
and evaporative monitors due to a “trip based” design. Saab has provided driving cycles in
its service information to allow monitors to operate. These vehicles should be treated as
other non-problematic vehicles. Saab Technical Service Bulletin not yet available.
1996 Subaru vehicles - Vehicles will clear readiness at key-off. There is no reprogramming
available for this line of vehicles. These vehicles should be scanned for MIL illumination
without regard to readiness status. Subaru Technical Service Bulletin #11-49-97R (see
Appendix F of this guidance).
1997 Toyota Tercel and Paseo - Vehicles will never clear the evaporative monitor to
“Ready.” At this time no fix is available. Vehicles should be scanned using remaining
readiness monitors as described for non-problematic vehicles.
1996 Volvo 850 Turbo - Vehicles will clear readiness at key-off. There is no reprogramming
available for this line of vehicles. These vehicles should be scanned for MIL illumination
without regard to readiness status. Volvo Technical Service Bulletin #SB 2-23-0056.
1996-98 Volvo vehicles (excluding 850 Turbo) - These vehicles may have a high degree of
“Not Ready”for catalyst and evaporative monitors due to a “trip based” design. Volvo has
provided driving cycles in its service information to allow monitors to operate. These
vehicles should be treated as other non-problematic vehicles. Volvo Technical Service
Bulletin #SB 2-23-0056.
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Why are Volvos so endearing? Its just a car.