Skip the auto shop - Our mechanics make house calls

Q: I need help with diagnostic trouble codes that suddenly appeared making vehicle almost undriveable.

asked by on

I have a 2012 Mazda CX-5 that i imported from Japan about 9 months ago. When I started a week ago one morning, I got engine check light and errors with SCBS, TPMS and traction control warning light is illuminated. Car is almost undriveable. Seems as though it keeps braking and is very jerky (bucking). Car drove issue free the night before. I however did leave a hood lamp on by mistake and i would sometimes get before an error about power management system and the I-Stop would not work...it would be flashing orange. Don't know if problems are related. I took car to the closest technician. He scanned and picked up several codes: U0001, P061B, P0A8D, U0401 and B11D4. He cleared them and might have reset and car drove fine. Used for a few a hours and parked for around 5 hours. When i restarted the problem reoccurred. i subsequently had the ECU reflashed by a mazda technician. Car drove fine on test run. Parked it up for a few hours and problem returned. i changed the battery..same problem.

My car has 67000 miles.
My car has an automatic transmission.

A: Firstly, you should have the battery discon...

Firstly, you should have the battery disconnected and the PCM disconnected. Check their connectors for any problems and apply dielectric lube to the connectors so the connection is clean from corrosion. If the problem continues then replace the PCM. All the codes are related to PCM miscalculations or data read problems. Have another certified technician, like one from YourMechanic, diagnose the trouble codes firsthand in order to pinpoint the issue.

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: special battery?

Hello there, thank you for asking about your 2014 Hyundai Elantra. Car batteries are generic, except the very sophisticated battery packs used in electric or hybrid electric vehicles. In terms of physical size, capacity, and terminal type and position though,...

Q: Solving electrical problem resulting from reversed battery terminals

Reverse polarity, at the battery, in a 12 volt electrical system on a car can cause a variety of effects including damaging the alternator, diodes and the numerous microprocessors on a vehicle like those in the powertrain control module (PCM)....

Q: Check Engine Light on Dodge Ram 1500 with code P0073

Check the condition of the harness that plugs into the sensor to ensure that the sensor is staying plugged in. If you are saying that the sensor is functioning and the voltage does change, then it is possible that your...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...