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Dan
Dan, Technician
Category: Mercury
Satisfied Customers: 23586
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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I have a 1999 mercury sable check engine light on and is

Customer Question

I have a 1999 mercury sable check engine light on and is misfiring had computer scan and I need to know what these codes means in plan english 1)P0420-B-1 CAT EFFE, 2)P1270-RPM/SPEED LIMITER 3)P0301-CYL 1 MISSFIRE 4)P0303 CYL 3 MISS FIRE 5)P0316-MISSFIRE ON START UP THEY RECOMMEND COMPUTER DIAG FOR $196.00 and not telling me anything
Submitted: 4 months ago.
Category: Mercury
Expert:  Dan replied 4 months ago.

Hello, my name is***** the check engine light flash while driving? Has anything been replaced yet? Thanks.

Customer: replied 4 months ago.
has just started flashing today after 2 mos
Expert:  Dan replied 4 months ago.

Has anything been replaced yet? When is last time plugs/wires were replaced? Thanks.

Customer: replied 4 months ago.
No I'm not a mechanic I just need to know what the codes mean and have my brother fix the problem he would know once I let him know
Expert:  Dan replied 4 months ago.

P0420 usually means the catalytic converter is failing but if you have a misfire "like you do" that could also cause the code so take care of misfire codes first. Replace plugs/wires and it should take care of he misfire codes and likely the P0420 code. P1270 usually means the output speed sensor has failed on transmission. Parts alone will cost you around $100. Let me know if you have more questions or if there is anything else I can do to help. THanks.

Customer: replied 4 months ago.
What about the other codes
Expert:  Dan replied 4 months ago.

The Other codes are misfire codes which would be taken care of by plugs/wires. Let me know if you have questions, thanks.

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