P0733, P0734, P792, P490, P1790 after mechanic rebuilt en...

Q: P0733, P0734, P792, P490, P1790 after mechanic rebuilt engine

asked by on June 03, 2017

I just had engine rebuilt and got car back. Check engine light came in after 24 to 48 hours. P0733, P0734, P792, P490, P1790 after mechanic rebuilt engine

My car has 170000 miles.
My car has an automatic transmission.

I think these codes may be explained by an electrical harness connector that is unplugged. The first two codes refer to the transmission ratios and the P0792 is for a speed sensor. The lack of a speed sensor signal could be causing the 733 and the 734 codes. code 490 is for high voltage at an EGR sensor which could happen if the circuit is not completed and 1790 is a Chrysler specific code for the transmission control system. So while it looks bad, it may be that all of these codes could be solved by correcting a single electrical connection. Take the car back to the Mechanic and ask him to look it over and see if there is something amiss. Removing and installing an engine involves dozens of electrical connections and it’s very easy to overlook something. If you need another opinion, you can contact Your Mechanic to have a technician come out to your home or office to check out your Chrysler and make a recommendation.

Was this answer helpful?
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・Fair and transparent pricing

Get a quote

What others are asking

08 camry hybrid. Hybrid battery seems to test ok, I removed the entire pack and load tested each cell, but i still get dash light

Hi there. Typically when a warning light is illuminated on the dash, it is due to an error code being created and stored in the ECU. In most cases, in order for the error light to go away, it needs...

1.Van shakes only when backing up. 2. While driving, van will not change gears.

Hi Arthur. Thanks for contacting us today. One thing that could cause both of these issues is a blown or leaking inner transmission seal. Since the automatic transmission works as a hydraulic unit, any leaks can cause inconsistent operation of...

How do I replace my thermostat housing on my 2008 Chrysler 300

Hi there. Replacing this part does not require a lot of knowledge of cars, but you do need to have some mechanical experience to keep you from damaging anything. The thermostat housing can easily be broken when installing it if...

Related articles

The Best Used Cars to Buy If You’re a Massage Therapist
If If you're a massage therapist, one of the cornerstones of your business has to be that you don’t keep your clients waiting. That means you need a vehicle that’s reliable. You also will have to move your gear, including...
2012 Chrysler 200 vs. 2012 Chevrolet Malibu: Which One Should I Buy?
When you are looking for a small-range sedan, you need to get somewhere quickly and inexpensively, and may even need to take a few kids with you. Slightly larger than a commuter car, these mid-size options offer decent gas mileage,...
The Best Used Cars to Buy If You’re an Interior Designer
As As an interior designer, you need to transport a great many different items, including fabric, paint and wallpaper samples and sometimes even furniture items. You probably don’t handle overly large loads very often, and when you have to, you’ll...