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!
  1. Home
  2. Questions
  3. Check Engine Light on Dodge Ram 1500 with code P0073

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: Car is cranking but not starting

I would suggest checking the crankshaft and camshaft position sensors as these help to control ignition and fuel injector timing. It may be possible for the plugs to have spark and the fuel injection system to have fuel pressure, but...

Q: When I turn on my vehicle or have it parked, idling, the rpm gauge goes up and down, as if I'm pushing or revving the gas pedal.

What you are describing sounds like a dirty or failing idle air control valve. The idle air control valve monitors the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and...

Q: I changed out the camshaft position sensor, the car is still stalling and hard to start. It now shows a different P code.

The coolant temperature sensor (CTS) in your vehicle has failed and is making the computer think that the engine is too hot. When you shut off the engine and the engine will not restart, is it because the computer thinks...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...