The air pump supplies the catalytic converter with extra oxygen so that it can efficiently catalyze any unburned fuel. On start up, the catalytic converter is cold and requires some help to quickly get up to temperature allowing it to...
If you are producing too much NOX this means your combustion is running too hot. This is usually caused by the engine running too lean or the EGR system is not flowing enough to cool the combustion. You should remove...
The purge valve is mounted on the engine and you will see hose connections from the valve to the intake manifold as well as a wire harness connection. The purge valve should be tested to determine if it is actually...
Hi there. The code is coming up for more than the O2 sensors or Catalytic Converter. Perform the following steps to determine what is the cause for the code P0420. Check the following A damaged or failed oxygen sensor The...
Hi there. Before you decide to have the catalytic converter replaced in your vehicle, consider performing the following checks: Check the following: A damaged or failed oxygen sensor The oxygen sensor wiring damaged or connected improperly The engine coolant temperature...
The issue could be the evaporative emission vent purge valve on the vapor charcoal canister. I recommend using a sniffer that is used for butane and check for a fuel leak around the vent purge valve and see if there...
Hi there. The issue that you are having is the purge valve (https://www.yourmechanic.com/services/canister-purge-solenoid-replacement) on the fuel system is not functioning correctly and needs check and possibly replaced. The code P0600 is referring that the dash is not communicating to the...
Hello and thank you for contacting Your Mechanic. For the code P0420 (https://www.yourmechanic.com/article/p0420-obd-ii-trouble-code-catalyst-system-efficiency-below-threshold-bank-1-by-jamahl-walker) to come on, there could be a lot of issues that could arise to a non functioning catalytic converter. Before you decide to replace the catalytic converter,...
Hello. If you have performed the necessary driver cycles and have not lost battery voltage or reset the computer at any time then you either have a problem with the heater circuit of the sensor or the computer is failing....
Hi there. The code P0597 (https://www.autocodes.com/p0597.html) is for the thermostat heater control circuit. This means that the thermostat is electronically controlled in your vehicle. To see why this code is on, check the following: A loose or corroded connector on...
What you do next depends on what particular part of the smog test your car failed. The car is tested for HC, CO and NOx levels. Different problems will raise the levels of different pollutants. If your car failed the...
Hello, thank you for writing in. The error message you got about the low threshold means the oxygen sensor has failed, the fuel system is off, or the catalytic converter is having issues. The amount of information available isn't enough...
To remove the canister, perform the following: Remove the two bolts that hold the canister onto the car and drop it down. Then remove the bolts that secure the canister to the shield cover. Disconnect the wiring harness to the...
Not much damage will result in this event. The only thing that will happen is the fuel may leak out the run off tube and cause an external leak as the little run off hose is rarely used. In that...
For the transmission, check the fluid (https://www.yourmechanic.com/services/transmission-fluid-is-leaking-inspection) to see if it's low. If the fluid is low, then it will need to be topped off. If the fluid is full and is red in color, then there could be an...
Hello, thank you for writing in. The checking engine light that you are receiving can stand for a large number of issues with the vehicle, and knowing what codes have been triggered are the only way to resolve the issue....
Here's the drive cycles for your vehicle. O2 and Catalyst monitor: Ambient temperature must be at 41 degrees or higher. Gas tank must be filled 1/2- 3/4's full. Start engine and let idle for 5 minutes with AC rear defogger...
Hi there. Different people who check the emissions on a vehicle may only check the computer and the gas cap. They may not check under the vehicle for any signs of fuel leakage. That is probably why the vehicle passed....
Hi there. Depending on your state that you live in and the emissions requirements, removing the muffler may cause your vehicle to fail emissions. Plus, on a newer vehicle that has a manufactures warranty, removing the muffler completely can void...
Hi. Emissions codes and emission problems are sometimes very difficult to diagnosis and pin point what exactly is causing the problem. Because of this it sometimes requires extra labor time to fix the emission problem properly. The good thing about...
