Ford Focus EGR codes

MarkR

Hi all,

I've a 2010 1.6 diesel focus, and after some intermittant power losses, I checked the codes and was getting the below.

• P042F - Exhaust Gas Recirculation 'A' Control Stuck Closed
• P0490 - Exhaust Gas Recirculation 'A' Control Circuit High

I've just had my EGR valve replaced, and the codes are still appearing. I'll drop into the garage again, but any ideas in advance?

punisher5112

MarkR wrote: »

Hi all,

I've a 2010 1.6 diesel focus, and after some intermittant power losses, I checked the codes and was getting the below.

• P042F - Exhaust Gas Recirculation 'A' Control Stuck Closed
• P0490 - Exhaust Gas Recirculation 'A' Control Circuit High

I've just had my EGR valve replaced, and the codes are still appearing. I'll drop into the garage again, but any ideas in advance?

Were they cleared previous after install of new one?

MarkR

Yeah, they had.

Waterson

Egr Control circuit faults may point to a faulty transistor in the computer module or a wiring fault. Did your mechanic check the control circuit or attempt to actuate the valve using scantool? A circuit high fault indicates that the computer is having trouble grounding the control circuit, hence is recording a high voltage as opposed to the desired 0 v for a grounded or 'on' valve.

MarkR

He's going to run the scan in the morning, I'll ask him about the above, thanks.

Vamp369

I've heard that the valve needs to be programmed into the ECU. It can't just be replaced and work as before.

mullingar

Yes, a new EGR valve needs to be calibrated to the ECU.

Very easily done with a €10 OBD cable & ForScan software (free)

greasepalm

beginning to wonder if fords are becoming the new vws with clogged egr units and wondering if its worth throwing into fuel tank a cleaner to cut down on that crap that clogs them up.

mullingar

Cheapest thing to do is just throw in a EGR blanking plate. Permanent Job.

MarkR

Turns out I have a split hose, and the turbo is going. Common enough on these engines I've heard. New hoses, turbo innards and cleaning out sump will run to about 1200... Poop

MarkR

I'm going to replace the turbo inlet hose, see if the turbo will behave itself then.

Waterson

Suprised the car hasn't set some low boost fault codes in that case. In what way is the turbo on its way out? Seems you may have two different issues going on. With regards the idea of blanking off egr valves, this may cause issues with premature dpf blockages, especially in these engines.

mullingar

MarkR wrote: »

Turns out I have a split hose, and the turbo is going. Common enough on these engines I've heard. New hoses, turbo innards and cleaning out sump will run to about 1200... Poop

MarkR wrote: »

I'm going to replace the turbo inlet hose, see if the turbo will behave itself then.

Don't change any pipes until it's diagnosed fully.

Turbos only fail when they suffer oil starvation. This usually occurs when the oil has degraded too far, normally caused by insufficient frequency of services.

There is a documented check for the oil flow on those turbos, basically remove the oil return line from the underside of the turbo, stick on another pipe and measure the amount of oil when the engine idles for 60 seconds, you should have collected a minimum of 300mls. If you exceed this volume, the oil feed pipe is good.

Check to see how much play is in the turbo shaft, normally a max of 1 mm is ok.

MarkR

I'm going to go for a second opinion. Thanks

rex-x

mullingar wrote: »

Don't change any pipes until it's diagnosed fully.

Turbos only fail when they suffer oil starvation. This usually occurs when the oil has degraded too far, normally caused by insufficient frequency of services.

.

Turbos have many different failure modes, one of which is oil starvation but there are many others too.

greasepalm

i wonder how many use wrong grade of oil and as said mileage done since last oil change.?

MarkR

I get it serviced every 10k miles, and the previous service history seems to show the same.

Waterson

MarkR wrote: »

I'm going to go for a second opinion. Thanks

Good idea. A split hose will cause boosting issues. The EGR does need to be programmed in after replacement. Did you ask about checking the wiring back to the ECU?

MarkR

I had it repaired initially on a wednesday, and I brought it back on the saturday for a scan. I did ask over the phone about it being coded, but he seemed to think it wasn't required. I'll mention the coding / possible lack of and the wiring from the egr to the ecu to the guy I'm bringing it to tomorrow.