Skip the auto shop - Our mechanics make house calls

Q: Overdrive and reverse is out. There is also a grinding noise and trouble codes P1289 and P0340.

asked by on

I've been hearing a grinding sound under the hood on the driver side. I would hear it more the faster I was going usually around 50-60 mph. Now my overdrive and reverse is out. I can drive it kinda ok with overdrive off. Also it seems like it's not wanting to shift into 1st or 2nd. I checked the computer and got the codes P1289 and P0340. I need to know how to make my car run properly again.
My car has an automatic transmission.

A: Hello and thank you for contacting YourMech...

Hello and thank you for contacting YourMechanic. The code P1289 is for the cylinder head temperature sensor input being high. Check the harness to the cylinder head temperature sensor and check to see if there is any corrosion or any moisture. If the input is high, then the sensor could be stuck in the operating position when the engine is running cold before it gets to operating temperature.

As far as the P0340 code, this refers to the camshaft position sensor and registers that is has failed. I recommend replacing the camshaft position sensor, which will help the engine with a better drivability.

The reason that the transmission is not going into overdrive and reverse, is the clutch packs inside your transmission are not being applied. This could be caused by the clutch pack being worn out or the transmission control module (valve body) not supplying pressure to the clutches. Check the harness to the transmission and make sure that all connections are tight. Check the transmission for the fluid level and ensure that it is full and light red. If the transmission fluid is dark red, then the oil is varnished from heat build up. If the transmission oil is black, then the oil is burnt.

The sound that you are hearing is a gear grinding sound, which could be caused by one of the clutch pack materials embedded into the gear train. It is likely that you may need to rebuild or replace your transmission. If you would like to have this all scoped out by an expert, have a certified professional from YourMechanic come to your car's location to diagnose the Check Engine Light and the grinding noise, and advise you on all of the correct repairs.

Was this answer helpful?

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

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: I think my wheel bearing is worn but today my breaks went out and there is fluid leaking right behind the worn bearing could that

It is not very common for a noisy wheel bearing to cause the brakes to start leaking. If the rear brakes are leaking behind the drum brakes then most likely the wheel cylinders have started to leak from the brake...

Q: Car will start but will not stay on

Hi there; I can understand your frustration, but to break it down simply; the electrical components (including wiring, relays and the ECU) on a 98 Mustang are not 100% compatible with the 96 engine system. When you swap motors, you...

Q: Cannot remove the starter. 2001 Mitsubishi montero sport. V6 3000 24 valve

It may be necessary to remove the motor mount shield, disconnect the transmission cooler lines, and front axle actuator to have room to get starter out. If you need to have this done, a technician from YourMechanic can come to...

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 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...