Skip the auto shop - Our mechanics make house calls

Q: Getting codes P0455 and P1470

asked by on

I get codes P0455 and P1740.

Hello. Your codes bring up two completely different problems.

The P0455 is for a small leak in the evaporative emissions system. Most of the time it is as simple as replacing the gas cap and clearing the code. If that is not the problem then most of the time a smoke test would need to be done to find the leak.

The P1740 code is for a torque converter clutch, overdrive solenoid problem. It may be the solenoid, but most of the time this code comes up when the transmission is failing internally. The transmission pan should be removed and inspected for metal and debris indicating a serious internal issue. You should get the help of a transmission shop to assist with this code.

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

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: Wheel bearing hub assembly

Based on the Factory Service Manual (FSM), you remove the hub/wheel bearing assembly (on 4WD vehicles) without axle or knuckle removal. That means you might have to use a regular thin wall socket and an offset (wobbly type) extension. The...

Q: Bad Ignition/electrical issue - takes several cranks before it starts!

Hello there, you have a few different faults going on with your 2007 Chevrolet Impala. A vehicle should not have to crank long before it starts unless there is a fault. Given the codes you have listed there are a...

Q: Why after changing the power steering pressure sensor I still get the check engine light stating sensor failure?

When you scanned the computer and got a code for the power steering pressure switch, it did not necessarily mean to simply replace the sensor to fix the code. The code you got directs you to a pinpoint test that...

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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.