Hi, I have a 2016 CX-5, and it's randomly going into limp mode, showing: Traction control, check engine, TPMS (initially flashing) and EPB (amber) light. I was wondering if anyone here knows which lights usually appear in limp mode, and if the EPB light indicates the root problem in this case, because I saw in other posts, that people get only the first 3 lights.
Limp mode lights? 2016 CX-5
- Thread starter Henry 13
- Start date
- :
- Plano, Texas, USA
How many miles on your 2016 CX-5? You have a CEL, read the code first. Any auto parts stores (Auto Zone) can read the code for you.
152 000 km.
U300004 (Control Module)
U0401 (Invalid data received from ECM/PCM)
P061B
P2226 (BP circuit)
And the EPB light?
- :
- Plano, Texas, USA
How old is your battery? Check your battery with a load test first.
It's New. 12 V
- :
- Plano, Texas, USA
I don’t believe you’ll see any code for a weak battery. A battery contains 6 cells, each at 2.1v when fully charged. 12.6V is the total voltage when it is healthy without charging (i.e: engine running). Not saying you have a bad battery, but that’s the easiest and cheapest part to eliminate the cause of your problems. If the battery is truly health, then you can start to look for more complicated causes (more $$$ too).
If your 2016 CX-5 has Grand Touring i-ActivSense Package which includes Mazda Radar Cruise Control, your FSC could cause your issues based on this TSB:
TSB No.: 15-002/19 SBS/SCBS, LAS/LDWS and/or HBC Warning Light on with DTC U3000:04-0A [Forward Sensing Camera (FSC)] Stored
I don't have that version. A bad connection in the EPB motor maybe?, because it isn't the original one. Can it trigger limp mode??
- :
- Plano, Texas, USA
My 2016 CX-5 had EPB warning light flashing but that was obvious caused by the weak battery although I had no problem to start the engine. I believe EPB problem shouldn’t make your car fall into the limp mode.
DTCs:
U300004 : FSC related.
U0401 : Invalid data received from ECM/PCM. Too generic for communication errors. Check all the connections to the PCM: The worst is a bad PCM.
P061B: Internal control module torque calculation performance. The PCM made a torque calculation error, either due to an internal failure or unexpected sensor data. It could be caused by bad connections from mass air flow sensor or throttle position sensor.
P2226: Barometric pressure sensor, and it generally integrates into the MAF or PCM. Could be a bad PCM too.
If you’re sure the battery is good, you just have to start figuring out the problems based on DTCs.
Ok, I understand. And how do I know if it's not the battery? The only information I have is that it reads 12 V and a little more, I don't remember the decimal. Although the problem started a month after changing the battery, and the amperage did vary from the previous battery, it did vary slightly
- :
- Plano, Texas, USA
Can you give us more details on battery change? What type and brand of battery? Can you use a digital multimeter to measure the statistic voltage? If it’s under 12.6 V, you then should take the battery to have a load test at any auto parts stores. This’s to eliminate the possibility of poor battery performance. Also check connectors on battery posts and to PCM making sure there’s no bad connections there.
Olvide
I forgot to add the following code from the EPB: U0401: 00-8B
The first battery was 12 V with a variable amperage From 512 if it's 0 celcius And 712 A in 18 celcius. The new one is 12V and only shows 718 A
- :
- Plano, Texas, USA
U0401? Here is a TSB outlined EPB related DTCs such as C112A and C2005 / C2006.
TSB 04-002/15: Elecrtric Parking Brake (EPB) Warning Light On / EPB Will Not Release in Cold Weather
View attachment 320935
Any idea what "00-8B" means?
