I've been the proud owner of an Evo MultiAir 135 for half a year now.

However, after two months the Engine Management Light turned on every now and then. It started off with every once in a while, and has become gradually more frequent. Currently, it turns on 90% of the time. It always starts after I've driven for about half a mile or something, and doesn't start immediately.

Other than a decreased mileage, it drives fine. No noticable lack in power.

I've brought it to the garage twice now. They read the fault codes and said they needed to replace the intake pressure sensor (literally translated from Dutch, not sure if this is the correct English name for it). Sensor replaced, but almost immediately I got the error again. They replaced the sensor again, but to no avail.

They say the fault codes clearly state it's the intake pressure sensor, but as that didn't fix it they say they just have to open up the entire engine to look for the issue, which would at least set me back €1000.

That made my alarm bells ring. Blindly diving into an engine doesn't seem like the smartest solution to me. I asked for the fault codes and am currently trying to figure out what the possible causes could be. As far as I can tell, there's no clear message that it should be the intake pressure sensor, which might confirm my suspicion that the garage hasn't really got a clue what they're doing.

The codes I got were:

• B1023
• B1013
• P1524
• P1579
• P0106
• P0127
• C1221
• C1286

So, a few questions:

1. These are a lot of fault codes. Is this normal or a sign I should get rid of this car ASAP?
2. Can anyone see a common denominator in these codes? I looked them up but can't make a lot of sense of it.
3. I read something about loose gas caps giving these errors as well. The closing mechanism in my gas cap has been limp since I got it. Could a loose gas cap cause all of these fault codes?

Hoping someone can help! Love this car but it's giving me quite a headache.

Welcome to the forum

A lot of seemingly unrelated fault codes generally points to an issue with the electrical system. My first guess would be on one of the earth cables having either a poor contact or being degraded internally.

Is it just the Engine Management Light (EML) you're seeing, or does the dashboard also present any error messages?

I'm sure someone in NL has MultiECUScan, but if you're interested in trying to undertake your own maintenance you can't do much better than investing in MES and a decent set of cables.

Thanks for the welcome and quick reply!

The dashboard also gives the errors 'Start/Stop disabled' and 'Hillholder disabled', but I reckoned that would be normal in limp mode. Aside from the EML, an exclamation mark in a triangle also pops up.

I uploaded an image, but as I'm new I can't post links yet. You can combine this to see a photo of my dash: imgur [dot] com/a/21OSISd

For a total of 4 times, another exclamation mark (I think but I'm not sure) has popped up on the speedometer. Whenever that happens, the power sometimes falls away and a red oil light shows up. When I restart the engine that light is always gone.

I'm not really interested in doing my own maintenance, I just want my car to work and have a feeling my garage (a specialized Fiat garage even) are only interested in racking up the costs as much as possible.

OK, we're getting somewhere - 'Start/Stop disabled' and 'Hillholder disabled' are almost always associated with low voltage.
I'd put money on it being one of the following:

1. Bad earth, as mentioned above
2. Battery on it's way out, how old is the car and does it still have it's original battery?
3. Alternator failure

So those messages aren't standard for limp mode? Goes to show I should stop assuming things myself.

The car is from 2010, I have no idea if it still has the original battery. Is there any way I can check if any of the mentioned solutions can be crossed of the list?

Thanks for the support Eklipze3k, really appreciate it.

There is a method using jumper cables to test if the main earth strap is an issue, I can never remember it but I know a man who can - Bernievarian

Grab a picture of the battery and we'll soon be able to tell you if it's original, at this age it'll very likely need replaced if it is. Use the forums Attachment feature rather than linking to external images if you can (I can't open imgur at work, but also we don't delete pictures here so it helps people who happen to come across this thread in the future)

Alternator failure can be tested by measuring the battery voltage while the engine is running.

Hi. Start:stop is obviously fitted.

Does it still function.


Stopping and restarting reliably on everyday journeys?


If it is still doing that.. then the battery is no longer 'prime suspect'..

Charlie