Skip the auto shop - Our mechanics make house calls

Q: Check Engine Light on Dodge Ram 1500 with code P0073

asked by on

Engine check light on, Scanner read P0073 code, I replaced ambient temperature sensor, engine check light still stay on with code P0073. Disconnect sensor and check voltage with multimeter on connector, it shows 5 volt, cross one positive and ground or cross both connector still read 5 volt. So I figure there is no broken wire or short. new sensor test with hair dryer and check ohm change down as it get wammer and goes up as it get cooler. Sensor seems working. what can be the problem?

My car has 81000 miles.
My car has an automatic transmission.

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Over drive shuts off on interstate after 15miles

Your overdrive uses a lock up converter that is supposed to lock the transmission input shaft to the engine so there is not slippage. You are not supposed to tow or carry heavy loads with the transmission in overdrive. You...

Q: Passenger's side window not working

Hi. This issue is because of the switch on the door. It can be the individual window switch or the master driver side switch. A certified mechanic can come and inspect your vehicle to diagnose and repair your window issue....

Q: P0405 EGR Sensor A Circuit Low

Hello and thank you for your question. With having 200,000 miles on the engine, I recommend replacing the EGR and not just cleaning it. The plunger is probably has too much carbon build up making the EGR stick open when...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...