Q: Replaced the transmission and now car won't start

asked by on May 19, 2016

I replaced the transmission a month ago on my car, and I have just started hesitation at lower speeds. I switched out the spark plugs, but the hesitation persisted.

It was giving a code of P025A, which online reads as "fuel pump control module circuit open". I don't have a reader myself, so I scheduled an appointment at the mechanic for a definitive diagnosis of which cylinders were missing, as I was told it was likely a bad coil or possibly bad coil insulators. But, my mechanic can't get it in for a bit, and the car died today.

It dropped out of cruise on its own, the TCS light got stuck on, then it threw a MIL, followed by another Check Engine Light. It seemed to get stuck in 2nd or 3rd gear, as it had no power off the line, but did eventually get up to highway speeds.

When I got it into the driveway, I wanted to make sure it wasn't the transmission again, so I tried to go into low gear and it did the same thing. Then, I put it in neutral and tapped the gas. It revved up to ~2100 RPM, stayed there, and then after a half second it revved up higher to about 3100 RPM. All from a brief depression of the accelerator.

I feel like these are all pretty isolated symptoms with the only common thing being the PCM. I just went back out to the driveway and the car won't start all now (no clicking, no turning over). What can I do to fix this?

Fuel Pump Replacement $129.49 - $1235.95 Get a Quote
Service Battery/cables $79.99 - $99.99 Get a Quote
Loss of power Inspection $79.99 - $99.99 Get a Quote

I highly doubt the powertrain control module (PCM) (also known as the ECU) is bad. Code P025A indicates a problem with a faulty fuel pump or its circuit, which could definitely be causing the problems you are having.

A fuel pump that is not functioning properly can result in lack of power and all other kinds of other drivability issues. I’m guessing that now the battery is probably dead since you said the vehicle won’t crank or start. The battery may have gotten run down when you were attempting to start the vehicle.

Regardless, this problem will require first hand inspection of your loss of power for proper diagnosis and repair. I suggest you call the team at YourMechanic, since we make house calls and can save you a tow bill.

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

What others are asking

My 2010 BMW 535 xDrive (n54) is making a ticking noise

It is not uncommon for BMW's to tick, but there are solutions that are helpful. Keeping the revs up (instead of lugging around like it was a big V8) is one way to do this. Keeping it at about 2000...

Need to get an alternator replaced on my 2006 ford escape. Was quoted $525 and an additional $125 for the belt. Does this sound correct?

Hello there. Costs will vary depending on whether you have the 4 cylinder or 6 cylinder. The 6 cylinder requires 3 hours to complete the two tasks (alternator plus belt). The 4 cylinder requires a little over 2 hours. These...

How to replace lower ball joints?

Hi there. To replace the lower ball joints on a 2003 Ford Taurus, perform the following steps: (1). Raise up the vehicle and put it on jack stands (2). Remove the tires that are associated with the ball joints...

My car won't accelerate over 40 mph and check engine light is on

Hi there. In many cases, when you have an issue with the car accelerating and the check engine light comes on, it's caused by a mechanical problem with either a drive-system, fuel or ignition system component. The light is triggered...

Check Engine light on error code P0442

The code P0442 is the computer has detected a small leak in the evaporative system. You may have a leak in the seal of the fuel cap, pressure sensor leak or defective sensor, vapor valves or lines leaking slightly. You...

What does the amber Check Engine Light mean

The amber Check Engine Warning Light is located on the instrument panel. When this light illuminates, there is a problem with either the engine control system, the throttle control system, or the electronic automatic transmission control system. Your vehicle should...

Starter stays engaged in park and neutral only

Your Ranger has two possible starter set ups. One has the starter solenoid directly mounted to the starter. The other is a remotely mounted solenoid on the right inner fender well. If your Ranger has the second set up, try...

I have a 2010 chevrolet malibu the service traction light is on and a cruise control code mean

The traction control system maximizes traction while accelerating on loose or slippery road surfaces. The reason you are seeing the warning light continuously is there is a fault somewhere in the complex sensor system that makes the system work by...

Repair transmission or buy new car

Only if the value of your car after the repairs are made will exceed the cost of the repairs plus the value without the repairs being made. A 13-year old vehicle may not be worth much and depends on resale...

Related articles

P008A OBD-II Trouble Code: Pressure Fuel System Pressure - Too Low
P008A means that fuel has entered into the system and sent a false signal due to a faulty fuel pressure sensor or problems with the fuel pump.
What Can Cause a Car to Leak Transmission Fluid?
A A vehicle’s transmission fluid system is closed, which means that the fluid or oil inside can’t escape when things are working properly. Therefore, when vehicles leak transmission fluid, it indicates another problem than just a need to add more...
P2322 OBD-II Trouble Code: Ignition Coil H Primary Control Circuit High
P2322 means there is a fault within the primary or secondary circuit of an ignition coil often due too shorted wires or an corroded oil connector.