Q: 1999 toyota corolla smog fail due to high emissions

asked by on

The car failed smog test in California for - OBD system checks, high emissions for HC and CO. I plan to sell the car and hence I want to do minimal repair to get it to work. The diagnosis done so far are the following: - valve cover gasket is loose and hence oil has drenched the O2 sensor and spark plugs and wires. The estimate is 900$ for changing the O2 sensor, valve cover gasket and the spark plugs and wires. Can you please suggest the minimal repair be done so as to pass smog without increasing the cost too much? I am ready to repair it myself with some guidance.

Thanks Sachi

My car has 185000 miles.
My car has an automatic transmission.

Hi there. High emissions for HC and CO can be caused by more than 12 individual emissions sensors or fuel systems, ranging from your O2 sensors, catalytic converter, EGR Valve and more. As such, giving you the right repair advice would be very irresponsible of us without completing a check engine light inspection to download the specific OBD-II trouble codes and inspect the vehicle at your location.

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. 1999 toyota corolla smog fail due to high emissions

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: Turning on car steering wheel shakes

Depending on the model of Camry you have, you may have an electrical steering system in the vehicle. The steering goes through a test when you first start the car and calibrates the steering system. If you feel like what...

Q: I have a 1994 acura integra in great shape but when I come to a stop while in traffic my car idles weird and acts like it wants to die

What you are describing sounds like a dirty or failing idle air control valve. The idle air control valve monitors the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and...

Q: How do I turn on the parking lights in a 2012 Toyota Corolla?

The parking lights are operated via the light switch, which is on the end of the turn signal lever. To turn on the parking lights, rotate the light switch to the parking lights position. When the parking lights are turned...

Related articles

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...