Symptoms of a Bad or Failing Manifold Temperature Sensor

Our certified mechanics come to you · 12-month, 12,000-mile warranty

GET A QUOTE Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of Replacing a Bad or Failing Manifold Temperature Sensor

Common signs include a rough idle, lack of power, high NOx production, and emissions test failure. Our certified technicians can come to you and diagnose the problem. You will receive a $30 credit towards any follow-up repairs that result from the diagnostic. Following are example prices for Manifold Temperature Sensor Replacement. Click on the button below to get an upfront quote for your car.

Cars Estimate Parts Cost Labor Cost Savings Average Dealer Price
2010 Toyota 4Runner $213 $93.57 $119.00 23% $276.32
2013 Nissan 370Z $167 $47.94 $119.00 27% $230.69
2005 GMC Jimmy $117 $46.99 $70.00 24% $154.49
2013 Acura ILX $142 $23.37 $119.00 30% $206.12
2009 Mercedes-Benz ML550 $106 $35.52 $70.00 26% $143.02
2003 Porsche Boxster $162 $43.38 $119.00 28% $226.13
GET A QUOTE FOR YOUR CAR Get a fair and transparent estimate upfront

How to Diagnose a Bad or Failing Manifold Temperature Sensor?

manifold temperature sensor

Manifold temperature sensors measure the temperature of the air inside the intake manifold. Other sensors measure the temperature of the air entering the engine or the temperature of the air in the surrounding atmosphere.

Manifold temperature sensors provide valuable information for several reasons. One reason is the Powertrain Control Modules (PCM) ability to calculate the amount of EGR flow (exhaust gas recirculation) into the engine by measuring the amount of temperature rise inside the intake manifold during EGR system operation. Another benefit is the PCM being able to accurately modify the amount of fuel being injected on turbocharged engines.

A failed manifold temperature sensor can cause several engine driveability issues.

Rough idle, lack of power, and high NOx production

A manifold temperature sensor that sends out a high temperature reading tells the PCM that the incoming air is very thin. The PCM in response reduces the amount of fuel to the engine so that the proper air / fuel mixture is maintained. The PCM unknowingly is creating a lean condition which can cause a rough idle. At freeway speeds, it can also cause a lack of power. Lean running engines also create high levels of NOx (oxides of nitrogen) which is a chemical component of smog.

Rough running engine, lack of power, and emissions test failure

A manifold temperature sensor that sends out a low temperature reading tells the PCM that the incoming air is very dense. The PCM in response increases the amount of fuel to the engine so that the proper air / fuel mixture is maintained. The PCM unknowingly is creating a rich condition which can cause your engine to run rough. Rich running engines also create high levels of carbon monoxide (CO) and hydrocarbons (HC) which are a chemical components of smog. These increased emissions levels will result in a failed tailpipe emissions test for your vehicle.

Another possible cause of a rough running engine or lack of power at freeway speeds created by a low temperature input is the perceived lack of EGR flow. If the PCM does not see a temperature increase in the intake manifold air during EGR system operation, the EGR valve may be opened more, allowing more EGR gas flow into the engine. This increase in EGR gas flow displaces more oxygen in the combustion chamber. This results in a highly diluted air / fuel mixture which makes less power and can create a rough running condition.

The trained technicians at YourMechanic can diagnose and, if necessary, replace your manifold temperature sensor.

Sensors
engines
Check Engine Light

Fast and easy Manifold Temperature Sensor Replacement service at your home or office.

GET A QUOTE FOR YOUR CAR
Get a fair and transparent estimate upfront

More related articles

How Long Does a Throttle Return Spring Last?
Not all vehicles on the road feature an electronic throttle control (ETC), which is also called drive-by-wire. For vehicles that don't offer this system, they have a throttle cable instead that...
Symptoms of a Bad or Failing Flexible Clutch Hose
Common signs include difficulty shifting, low clutch fluid, and feeling no resistance at the clutch pedal.
How to Find the Keyless Code on a Ford Explorer or Mercury Mountaineer
Many Ford Explorers and Mercury Mountaineers were manufactured with an option known as the Ford keyless entry keypad. Some models refer to it as SecuriCode as well. It...

Related questions

Q: Q: Cam shaft position sensor

Hi there. The camshaft position sensors are located on the front of your engine on the top under the engine cover. I usually do a complete inspection before replacing these because there are a number of reasons as to why...

Q: Car's #8 cylinder is misfiring

It is possible that your oil ring could be faulty in the number eight cylinder. If the oil ring is faulty, this can allow oil to get past the piston into the combustion chamber and therefore causing it to get...

Q: Q: Why is my car having problems starting?

Hey there. This may be related to to a variety of things. When your Check Engine Light comes on, generally there are fault codes that are registered in the car's computer which will indicate more specifically some of the possible...

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.

1-800-701-6230 · hi@yourmechanic.com