new CAT maybe a problem?
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Honda-Tech Member
Joined: Aug 2010
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From: San Luis Obispo, CA
new CAT maybe a problem?
Just bought this car last week, within a week it threw up a CEL:
P0420: Catalyst Efficiency below threshold
Haven't had it checked by a shop yet, but the old owner said he already replaced the cat, with a "smaller one," so I hope this isn't the problem.
He mentioned that it could be due to me not using 91 octane fuel. This car only calls for 87. ('01 LS) I don't believe this though. Any suggestions? or heard of fuel/cat relation?
P0420: Catalyst Efficiency below threshold
Haven't had it checked by a shop yet, but the old owner said he already replaced the cat, with a "smaller one," so I hope this isn't the problem.
He mentioned that it could be due to me not using 91 octane fuel. This car only calls for 87. ('01 LS) I don't believe this though. Any suggestions? or heard of fuel/cat relation?
B*a*n*n*e*d
Joined: Apr 2010
Posts: 1,993
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From: RI
Re: new CAT maybe a problem?
Just bought this car last week, within a week it threw up a CEL:
P0420: Catalyst Efficiency below threshold
Haven't had it checked by a shop yet, but the old owner said he already replaced the cat, with a "smaller one," so I hope this isn't the problem.
He mentioned that it could be due to me not using 91 octane fuel. This car only calls for 87. ('01 LS) I don't believe this though. Any suggestions? or heard of fuel/cat relation?
P0420: Catalyst Efficiency below threshold
Haven't had it checked by a shop yet, but the old owner said he already replaced the cat, with a "smaller one," so I hope this isn't the problem.
He mentioned that it could be due to me not using 91 octane fuel. This car only calls for 87. ('01 LS) I don't believe this though. Any suggestions? or heard of fuel/cat relation?
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