Typical Malfunction Thresholds

P0450: Canister pressure sensor chattering

-

Canister pressure sensor output

Less than 42.1 kPa, or more than 123.8 kPa

P0451: Canister pressure sensor noise

-

Pressure variation indicated by Canister pressure sensor in 10 seconds

More than +- C.3 kPa (+- 2.25 mmHg) 10 times

P0451: Canister pressure sensor fixed

-

0.02 inch leak criterion variation indicated by canister pressure sensor in 10 seconds

Less than 0.65 kPa (4.87 mmHg)

P0452: Canister pressure sensor low

-

Canister pressure sensor output

Less than 42.1 kPa

P0453: Canister pressure sensor high

-

Canister pressure sensor output

More than 123.8 kPa

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