P0167 OBD-II trouble CodeO2 Sensor Heater Circuit Malfunction (Bank 2, Sensor 3)

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0167 code

P0167 is a diagnostic trouble code (DTC) for "O2 Sensor Heater Circuit Malfunction (Bank 2, Sensor 3)". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $114.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.0 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford $114.99 $20.0
Toyota $114.99 $20.0
BMW $124.99 $20.0
SCHEDULE P0167 DIAGNOSTIC Get a fair and transparent estimate upfront

P0167 code definition

O2 Sensor Heater Circuit Malfunction (Bank 2, Sensor 3)

What P0167 code means

Many oxygen sensors are heated now in order to bring them to operating temperature more quickly. If any of the wiring in the heater circuit for this oxygen sensor is damaged this trouble code may appear.

What are the causes of the P0167 code?

  • Damaged wiring in the heater circuit
  • Faulty oxygen sensor

What are the symptoms of the P0167 code?

When the engine is first started, the engine’s fuel system is running in what is called “open loop”. During “open loop,” more fuel is used to keep the engine running (a rich condition) due to the fact that the air/fuel ratios are running on a pre-determined specification programmed into the powertrain control module by the manufacturer.

When the oxygen sensors have heated up to operating temperature, they begin to produce a signal voltage that is sent to the powertrain control module. When this happens, the engine goes into “closed loop.” This is where the powertrain control module will adjust the air/fuel ratio based off of the readings given by the oxygen sensors. If the heater circuit for the oxygen sensor is damaged, the sensor may never reach operating temperature causing decreased fuel economy and bad emissions.

How does a mechanic diagnose the P0167 code?

A mechanic would likely start the diagnosis of the P0167 code by taking a look at the third oxygen sensor in the second bank of the exhaust to check for any burned or damaged wiring coming from the sensor.

This is the most common cause of this code. If the wiring for the circuit looks fine, the problem likely lies in the sensor itself.

At this point, the mechanic would then test the oxygen sensor for proper function using the manufacturer’s specific procedure. If the sensor turns out to be functional, the problem lies in the powertrain control module.

Common mistakes when diagnosing the P0167 code

Just like any other trouble code that uses the words O2 sensor, the most common mistake that could be made in this circumstance would be to replace the oxygen sensor as the first step.

Some people think that, just because “oxygen sensor” is named in the trouble code, then this means that the part will automatically need to be replaced. This often leads to a misdiagnosis and wasted money.

How serious is the P0167 code?

The P0167 code can be lived with for a short time. Considering that this code is related to the third oxygen sensor in the second bank of the exhaust, the powertrain control module should still be receiving a signal from the five other oxygen sensors.

With the signals remaining, the powertrain control module should be able to maintain a correct air/fuel ratio for a period of time. It would still be wise to have this problem diagnosed and repaired as soon as possible.

What repairs can fix the P0167 code?

Additional comments regarding the P0167 code

The powertrain control module is a rare failure and everything else should be confirmed to be functional before replacing the powertrain control module. The most common causes of this trouble code are a faulty oxygen sensor or damaged wiring associated with the heater circuit of the oxygen sensor.

Need help with a P0167 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

Check Engine Light
P0167
trouble codes

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0167 code.

SCHEDULE P0167 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(7400)

Rating Summary
6879
249
58
41
173
6879
249
58
41
173
 at YourMechanic

David

13 years of experience
393 reviews
David
13 years of experience
Chevrolet Malibu L4-2.4L - Check Engine Light is on Inspection - Marietta, Georgia
He explained everything to me in detail on what I needed to know about my car. Definitely recommend him for getting the job done.
 at YourMechanic

Raymond

37 years of experience
402 reviews
Raymond
37 years of experience
Toyota Camry L4-2.2L - Check Engine Light is on - Las Vegas, Nevada
Raymond did a great job however I was charged for two hours labor and he was only here less than 45 minutes. should I expect this on future appointments with your mechanic ?
 at YourMechanic

Shane

17 years of experience
217 reviews
Shane
17 years of experience
Volkswagen EuroVan V6-2.8L - Check Engine Light is on Inspection - Austin, Texas
Arrived on time. Explained the issues he found and how he will fix it. I have parts on order and will schedule an appointment to have Shane install the parts when they arrive.
 at YourMechanic

Kanstantsin

19 years of experience
51 reviews
Kanstantsin
19 years of experience
Ford F-150 V8-4.6L - Check Engine Light is on Inspection - Littleton, Colorado
Kanstantsin arrived early. Was very courteous and professional. Will highly recommend to anyone. Thank you Kanstantsin.


More related articles

P2227 OBD-II Trouble Code: Barometric Pressure Circuit Range/Performance
P2227 trouble code definition Either the barometric pressure sensor is providing a reading that does not correspond to the parameters of the...
P2069 OBD-II Trouble Code: Fuel Level Sensor B Circuit Intermittent
P2069 P2069 code definition Fuel Level Sensor B Circuit Intermittent What the P2069 code means P2069 is an OBD-II generic code for the engine control module (ECM) detecting the fuel level sensor B signal is intermittent. The sensor output voltage...
P0422 OBD-II Trouble Code: Main Catalyst Efficiency Below Threshold
P0422 means the catalytic converter is malfunctioning. Other causes may be oxygen sensors, fuel pressure regulator or a mass air flow sensor.

Related questions

Cold weather makes the motor knock
This is a common problem with Hybrid Highlanders. Does the Check Engine Light illuminate when the knocking occurs? If so, Toyota released a technical service bulletin (TSB) related to cold start misfires. The associated TSB (T-SB-0210-11) covers the inspection, diagnosis...
Check engine light in code P0418
The air pump fuse is a 30 amp fuse that powers the pump. The "trigger" for the relay comes from the ignition switch, through a 10 amp fuse. Have you checked to see if the "trigger" wire to the relay...
My check engine light came on...car isn't overheating no change in engine temp gauges..autozone used one of their testing gages sa
There are several possible reasons for a check engine light (https://www.yourmechanic.com/services/check-engine-light-is-on-inspection) to come on. Typically, when the check engine light appears, the first step is to pull the diagnostic codes out of the computer with a scan tool, like you...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com