Q: I took my car to Advance Auto and them do a check engine light diagnostic test and the code is C0245

asked by on

I bought my car 2 weeks ago and the check engine light keeps coming on.. I took it to get a diagnosis test done and it read wheel speed sensor frequency malfunction... Mil - not requested Since last key cycle-pass Since Dtcs erased-pass Code # CO245

It also read code#PO420 Catalyst System Efficiency below thresholds Bank 1 MIL -Requested Since last cycle - Not Run Since Dtcs erased- fail

My car has 193082 miles.
My car has an automatic transmission.

Hello. Thanks for writing in. You may have two separate issues going on at once. The speed sensor code is likely due to sensor failure, or a bad connection. In the case of a bad connection, a good visual inspection may solve the issue. If the sensor has failed, it should trick some other codes as well. The P0420 catalytic converter code is telling you that system is detecting a problem. Its a relatively open ended code, but the system is not very complicated. The Catalytic converter may have failed, the oxygen sensor after the catalytic converter may have failed, the wiring connection may be lose or worn, or several other miscellaneous issues. You are going to want to handle both of these issues separately at first until you have reason to believe they are related, which is unlikely. If you receive another check engine light, make sure you retest the vehicle for codes.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. I took my car to Advance Auto and them do a check engine light diagnostic test and the code is C0245

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Transmission drives forward in reverse.

Claimed by Marvin Sunderland

Q: Calipher stuck

Hello. If the caliper will not release from the rotor then the brake line should be cracked open first to see if there is pressure int he hydraulic system that is keeping it locked up. If not then the caliper...

Q: P0421 and P0401 codes have appeared

Hello. The codes P0421 and P0401 refer to the oxygen sensor and EGR valve, respectively. It is possible that an issue with one is causing the fault to be seen by the other, as they will work loosely together. It...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...