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Ask Juan Crespo Your Own Question
Juan Crespo
Juan Crespo, Tech Trainer
Category: Toyota
Satisfied Customers: 1526
Experience:  A.S.E. Master Technician, Advanced Level, Emissions - Asian, Domestic, & European
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I have the following code erros on my 201 Rx 300, can you

Customer Question

Hi I have the following code erros on my 201 Rx 300 , can you help me understand what this means and what cost iwll imply to fix it ? C1246C1335C1223P1130
JA: Thanks. Can you give me any more details about your issue?
Customer: The engine light came on, and then I went to a Auto zone and they read the following error code :C1246C1335C1223P1130
JA: OK got it. Last thing — Toyota Mechanics generally expect a deposit of about $20 to help with your type of question (you only pay if satisfied). Now I'm going to take you to a page to place a secure deposit with JustAnswer. Don't worry, this chat is saved. After that, we will finish helping you.
Submitted: 1 year ago.
Category: Toyota
Expert:  Tim Mohr replied 1 year ago.

Hi, my name is ***** ***** do the coils or plugs requires removing the intake manifold, just basic hand tools are required to do this, would you like a copy of the procedure for this?

Expert:  Juan Crespo replied 1 year ago.

Hi there. Perhaps I can help...

Of the four trouble codes you mention, the three starting with a "C" are for the ABS/Traction Control - most common cause is a faulty ABS module. The remaining code, P1130, indicates a fault with the upstream bank 1 air/fuel sensor - replacing the sensor usually takes care of this issue.

Regarding cost, your best option would be to consult with your usual repair facility - which would be facilitated by the fact that now you know what the codes mean and what causes them.

Please let me know if you have any other questions regarding this issue.

Best Regards.

Customer: replied 1 year ago.
Isn't this related in any way to: brake master cylinder, or brake actuator / pump?
Expert:  Juan Crespo replied 1 year ago.

In a way; it's actually related to the circuits going from the ABS module to the brake master cylinder and brake actuator/pump. The computer cannot detect physical faults; it can only compare actual circuit signals with those in its memory. When it detects an anomaly, it sets a code. The ABS module, which controls the circuits going to the master cylinder and brake actuator, has been known to fail and cause those codes. A capable scan tool and oscilloscope would be needed to perform a pinpoint diagnosis - the same can be said about code P1130 and testing the air/fuel sensor.

Please let me know if you have any other questions regarding these issues.

Best Regards.

Customer: replied 1 year ago.
The issue was actually cause by a much simple issue,air filter lid was not fully closed and locked.
@0-30 miles after carefully closing the air filter enclosure the check engine light went off and no error code were presented by the car computer.
Therefore I appreciate the details sent was not really helpful.
Expert:  Juan Crespo replied 1 year ago.

I'm sorry if you found my information not helpful. As it is, there is no technical explanation for how an air filter lid not closed would cause either of the codes you said you had. As a matter of fact, you can remove the air filter and drive the vehicle and still the onboard computer won't generate any codes.

In any case. I'm glad you were able to get your issue solved. Please let me know if you need assistance in the future.

Best Regards.