P0156 is an OBDII trouble code that wake up in the Toyota Tundra. The is typically caused as soon as the O2 Sensor voltage is no within its mentioned operating range.

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financial institution two will be the side of the engine v cylinder 2 in the firing order. Sensor 2 is aft the the catalytic converter.

Toyota Tundra P0156 Symptoms


Often, the only symptom that P0156 is walk to be the service engine quickly light. In some cases, there deserve to be other symptoms as well. This symptoms include:

stormy running engine Smelly exhaust organization engine quickly light ~ above

Most of the time, it’s no a failure risk. But, choose anything that reasons the business engine soon light to come on it is a an excellent idea to have actually it solved as soon as possible.

Driving your vehicle for really lengthy periods the time with P0156 deserve to potentially lead to engine or catalytic converter damage.

P0156 Causes: Toyota Tundra

Here space the most typical issues that reason the P0156 password in the Tundra. They space presented in bespeak (somewhat) of many to least likely to cause the problem.


Damage come the Terminal– The terminal the the oxygen sensor connects come (the plug) is also fairly susceptible to damage. You’ll want to make certain that there is voltage going come it. There’s more on that directly below. Exhaust Leak– If the exhaust is leaking, climate it’ll permit oxygen in the shouldn’t it is in there. That can throw this code. Wrong O2 Sensor– If friend are getting P0156 after having recently replaced your Oxygen sensor, it might be the the replacement is dorn or bad.

Tundra P0156 Diagnosis

Here is a wonderful video the covers all aspects of diagnosing a P0156 trouble password It’s for a VW, however the password is universal.

It is possible to diagnose the P0156 through a multimeter. If you usage the multimeter, you’ll recognize whether or no the voltage comes to and from the oxygen sensor is within spec, this can help you recognize if it’s her Tundra’s O2 sensor, or wiring exploit that’s the issue.

If you don’t have access to a multimeter, it certainly wouldn’t hurt to examine the wiring to in between the fuse box and the Oxygen sensor first. If it end up gift a wiring issue, it’ll save you money end buying an unnecessary O2 sensor.

You can additionally use a voltage check light to identify whether or not the oxygen sensor is getting any type of voltage at every (they’re around $5 in ~ Walmart).

If it’s no getting any voltage, connect the check light to the harness plug and also shake the wiring a small bit. If the light come on, even for a second, you recognize that you have a brief circuit leading to the P0156 problem code.

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Most of the moment with P0156, it’s going to it is in the oxygen sensor chin that has actually caused the password to trigger. Good luck finding whatever caused the in her Toyota Tundra. If you have anything the you would prefer to add, you re welcome feel free to leaving a comment below.