Fuel System - MIL ON/DTC P0451:00 Set

Bulletin No: 01-027/11

Last Issued: 08/09/2011

Subject:
MIL ON WITH DTC P0451:00

APPLICABLE MODEL(S)/VINS
2011 Mazda2

DESCRIPTION

Some vehicles may experience MIL illumination with DTC P0451:00 (Fuel tank pressure sensor range/performance problem) stored in PCM memory. This may be caused by water or snow entering and freezing in the atmosphere breather hose of the Fuel Tank Pressure (FTP) sensor.

Customers having this concern should have their vehicle repaired using the following repair procedure.

REPAIR PROCEDURE

1. Verify customer concern.





2. Remove the L-shaped atmosphere breather hose (A) from the FTP sensor (B) and inspect for water and/or ice.

^ If water is found, drain the water from FTP sensor by shaking it.

^ If ice is found, warm up the sensor then drain.

CAUTION:
Do NOT use pressurized air to drain the water from FTP sensor, otherwise the sensor could be damaged.





3. Cut the new hose to 160mm (original length is approx. 999 mm).





4. Peel off and discard the tape (C) on No. 4 cross member. Apply rust preventive paint where the tape was removed, then install new clip.

5. Remove and discard the original L-shaped breather hose (A) from the FTP sensor (B).





6. Attach the new hose (A) (Length: approx. 160 mm) to the FTP sensor (B), then attach the other end of the hose to the new clip (D). Using M-MDS, confirm FTP sensor PID voltage reading is within 2.5v-3.6v, then perform evap self test.

^ If FTP sensor voltage reading is within range and self test passes, proceed to next step. If FTP sensor voltage reading is out of range and the self test fails, replace the FTP sensor.

7. Clear stored DTC in the PCM.

8. Verify repair.





PARTS INFORMATION





WARRANTY INFORMATION