What causes the P0420 code on a Toyota 4Runner?
The P0420 code in a Toyota 4Runner will often be thrown one of your oxygen sensors are not functioning properly. Typically, the code will be triggered by the upstream oxygen sensor (before the converter). There aren’t usually any drivability issues associated with P0420.
What does the OBDII code mean on a Toyota 4Runner?
Toyota 4Runner P0420 OBDII Code Defined. P0420 is a OBDII trouble code. The code technically stands for: Catalyst System Efficiency Below Threshold. Your 4Runner has at least two oxygen sensors, one before and after the catalytic converter.
Is the P0420 DTC code a trouble code?
The P0420 code is a very popular one and that’s why there’s a site dedicated to that specific trouble code. If your car’s check engine light is on, get that code read in case it’s a P0420. A P0420 code is a trouble code on OBD-II equipped vehicles.
Why does my Toyota 4Runner not pass emissions?
The software in your vehicle believes that the catalytic converter is no longer doing its job. If your vehicle has the P0420 code, it won’t pass emissions so please be aware of that. The P0420 code in a Toyota 4Runner will often be thrown one of your oxygen sensors are not functioning properly.
What is the P0420 error code for catalytic converter?
Error code P0420 – or Catalyst System Efficiency Below Threshold (Bank 1) – is one of several trouble codes that fall into the general exhaust system code block. All P042X codes (where “X” can be any number) refer to the catalytic converter and exhaust system.
What does a catalytic converter do in a Toyota 4Runner?
Catalytic Converter – A catalytic converter is responsible for scrubbing out as much pollution as possible from the 4Runner’s exhaust. Over time, they can become clogged. Although, modern catalytic converters are supposed to last the life of most vehicles, it could be there is some underlying problem if it has clogged.
What causes service engine light on Toyota 4Runner?
Service Engine Light – Often, this is the only symptom of the Toyota 4Runner P0420 code. There are many things that can cause the P0420 trouble code in your 4Runner.
What’s the problem with the Toyota 4Runner V8?
The issue, according to Canadian Gearhead and CarSpec, is with the 4.7-liter V8’s catalytic converters. Catalytic converters need to be warmed up properly in order to lower emissions.
What causes a 4Runner to jerk under acceleration?
Discussion in ‘ 4th Gen 4Runners (2003-2009) ‘ started by Jrich124, Jul 13, 2017 . 2007 4runner sport 130,000 miles 6cyl bucks or jerks at around 45+ mph under slight acceleration noticed mostly on slight uphill grade. Seems to happen after the car warms up. Lasts only a second or two and quits until I accelerate again.
What does code P0420 mean on PCM?
Code P0420 represents a problem. However, if the downstream O2 sensor starts sweeping between rich and lean, or constantly reads a rich or lean condition, that’s an indication to the PCM that the cat converter isn’t doing its job of cleaning up the PCM’s mistakes.
Where is the P0420 sensor on a car?
P0420 refers to the catalytic converter or – more specifically – the oxygen (O2) sensors before and after it on the bank 1 side of the exhaust system. On most vehicles, there is an O2 sensor both in front (upstream) and behind (downstream) the catalytic converter. Normally, these two O2 sensors will have different readings when the car is running.
What does Toyota catalytic converter code P0420 mean?
The function of the catalytic converter is to break down harmful pollutants that are created by your Toyota during the combustion cycle and convert them into harmless gases. Code P0420 indicates that the catalytic converter is not functioning efficiently, therefore increasing the output of harmful pollutants by your Toyota. Toyota P0420 Symptoms