Fault codes - local shop can't solve

EVS · 25th August 2021, 16:26

Hey all
My car's been having "hiccups/stutters" for a while, combined with the check engine light.
I took it to the local shop and they sorted it -for a few weeks.
The "hiccups" have returned and the check engine light has turned on again as well.
I scanned for codes and the following codes turned up:
P0420 Catalyst System Efficiency Below Threshold (Bank 1)
P0445 Evap Emission Control Sys Purge Control Valve Circuit Short
P1300 Boost Calibration Fault
P1316 Injector Circuit / IDM Codes Detected
P1520 Intake Manifold Runner Control Circuit Malfunction

Do you guys know what the problem could be and how I could solve it?
Thanks in advance

Yorkshire GOC · 25th August 2021, 17:44

Am sure 1520 is a spurious left over BMW Mems 3 code and does not apply to MGR cars - no doubt someone will come on and advise.

The other codes point your to your cat being unable to cope with the engine emissions output - the cause being the fuel mix is wrong - could be an injector at fault or the Map sensor (Manifold Pressure sensor) is failing which would mess up the fueling ratio which would cause the Cat error code as the cat cannot cope with the emissions.

As your engine appears to be a 1.8 NASP (no turbo) not sure how you could get a P1300 error as that is a turbo fault?

But no doubt someone with expertise will confirm this.

grivas · 25th August 2021, 20:46

Quote:

Originally Posted by EVS

Hey all
My car's been having "hiccups/stutters" for a while, combined with the check engine light.
I took it to the local shop and they sorted it -for a few weeks.
The "hiccups" have returned and the check engine light has turned on again as well.
I scanned for codes and the following codes turned up:
P0420 Catalyst System Efficiency Below Threshold (Bank 1)
P0445 Evap Emission Control Sys Purge Control Valve Circuit Short
P1300 Boost Calibration Fault
P1316 Injector Circuit / IDM Codes Detected
P1520 Intake Manifold Runner Control Circuit Malfunction

Do you guys know what the problem could be and how I could solve it?
Thanks in advance

Your car needs a service, change air filter, fuel filter, spark plugs and oil and oil filter, add a good quality fuel conditioner ( Forte) then take the car for a good run after the engine has warmed up nicely, then have an emissions test carried out, that will give you a base line to start from, your problems appear to be emission related.

EVS · 26th August 2021, 05:22

It's a 1.8 (non turbo) indeed.
I only had it serviced in April, replaced all but fuel filter then. The problem existed before that time, with the occasional check engine light, but they said everything looked fine. (To my knowledge, P0445 had not shown up at this stage)
Recently it had a bad case of "the hiccups" shall we say, and they read out the codes and found P0445 among some others I don't recall. They have replaced the purge valve (or so they said anyway) and added a fuel conditioner. The problem went away for a few weeks and is now back.
Needless to say I'm not keen on taking my car back there.

EVS · 6th September 2021, 14:21

Update: a friend suggested switching to another fuel station to see if it would make a difference. I have now run a few tanks on another fuel station's fuel and the "hiccups" seem to have disappeared. I've now cleared the codes through TOAF, but code P1520 (in TOAF listed as "unknown error") won't clear.
Do I just wait and see if everything remains ok or do I still need to look into whatever might be causing this P1520?

SD1too · 6th September 2021, 15:39

Quote:

Originally Posted by EVS

... code P1520 (in TOAF listed as "unknown error") won't clear.

RAVE doesn't even list this code for your MEMS engine management so I'd say that you're safe to ignore it as Yorkshire GOC said earlier.

Simon

EVS · 6th September 2021, 16:36

Alright, thanks, just wanted to confirm.
Guess now I'll just have to wait and see if anything pops up again. If it doesn't, I imagine my former fuel station sells lesser quality fuel which caused the issue.

EVS · 27th September 2021, 12:20

It seems the underlying problem persists...
So far, I haven't encountered any "hiccups" while driving anymore, but check engine light has come back on with codes P0445 and P0420.
Not sure if relevant, but the check engine light came on while on the motorway.

I'm assuming the P0445 causes the P0420, so where do I best look to sort this issue?

grivas · 27th September 2021, 15:22

Quote:

Originally Posted by EVS

It seems the underlying problem persists...
So far, I haven't encountered any "hiccups" while driving anymore, but check engine light has come back on with codes P0445 and P0420.
Not sure if relevant, but the check engine light came on while on the motorway.

I'm assuming the P0445 causes the P0420, so where do I best look to sort this issue?

It seems to me that your purge control valve is faulty, thus interfering with the lambda sensor ( Bank 1), the one located before the catalytic converter, have the evaporative charcoal canister and associated tubing checked for blockage/other damage, and if there is any electrical connector to it unplug it and clean it with electrical contact cleaner.
Have the lamdba sensor checked out, cleaned or replaced as well.

EVS · 27th September 2021, 19:55

Quote:

Originally Posted by grivas

It seems to me that your purge control valve is faulty, thus interfering with the lambda sensor ( Bank 1), the one located before the catalytic converter, have the evaporative charcoal canister and associated tubing checked for blockage/other damage, and if there is any electrical connector to it unplug it and clean it with electrical contact cleaner.
Have the lamdba sensor checked out, cleaned or replaced as well.

Is the purge control valve/evaporative charcoal canister something I can do myself? If so, could you point me to where in the engine it is located?
The lambda sensor was replaced last year so would surprise me if it's bad already, but worth looking at while I'm at it anyway.

25th August 2021, 16:26	#1
EVS Regular poster Rover 75 1.8 Connoisseur SE Join Date: Jul 2020 Location: Flanders Posts: 68 Thanks: 13 Thanked 7 Times in 3 Posts	Fault codes - local shop can't solve Hey all My car's been having "hiccups/stutters" for a while, combined with the check engine light. I took it to the local shop and they sorted it -for a few weeks. The "hiccups" have returned and the check engine light has turned on again as well. I scanned for codes and the following codes turned up: P0420 Catalyst System Efficiency Below Threshold (Bank 1) P0445 Evap Emission Control Sys Purge Control Valve Circuit Short P1300 Boost Calibration Fault P1316 Injector Circuit / IDM Codes Detected P1520 Intake Manifold Runner Control Circuit Malfunction Do you guys know what the problem could be and how I could solve it? Thanks in advance

25th August 2021, 17:44	#2
Yorkshire GOC I really should get out more....... Rover 75 connoisseur se v6 auto Join Date: May 2014 Location: Hull Posts: 2,063 Thanks: 1,842 Thanked 623 Times in 469 Posts	Am sure 1520 is a spurious left over BMW Mems 3 code and does not apply to MGR cars - no doubt someone will come on and advise. The other codes point your to your cat being unable to cope with the engine emissions output - the cause being the fuel mix is wrong - could be an injector at fault or the Map sensor (Manifold Pressure sensor) is failing which would mess up the fueling ratio which would cause the Cat error code as the cat cannot cope with the emissions. As your engine appears to be a 1.8 NASP (no turbo) not sure how you could get a P1300 error as that is a turbo fault? But no doubt someone with expertise will confirm this. __________________ She came off the Longbridge Line on 20-05-2003 The Silver Machine was the 13th of 160 Rover 75's to come off the production line that day and is the 100th of 527 Starlight Silver Rover 75 2.5 V6 Connoisseur SE Auto saloons listed in the build records produced world wide. Last edited by Yorkshire GOC; 25th August 2021 at 18:40..

26th August 2021, 05:22	#4
EVS Regular poster Rover 75 1.8 Connoisseur SE Join Date: Jul 2020 Location: Flanders Posts: 68 Thanks: 13 Thanked 7 Times in 3 Posts	It's a 1.8 (non turbo) indeed. I only had it serviced in April, replaced all but fuel filter then. The problem existed before that time, with the occasional check engine light, but they said everything looked fine. (To my knowledge, P0445 had not shown up at this stage) Recently it had a bad case of "the hiccups" shall we say, and they read out the codes and found P0445 among some others I don't recall. They have replaced the purge valve (or so they said anyway) and added a fuel conditioner. The problem went away for a few weeks and is now back. Needless to say I'm not keen on taking my car back there.

6th September 2021, 14:21	#5
EVS Regular poster Rover 75 1.8 Connoisseur SE Join Date: Jul 2020 Location: Flanders Posts: 68 Thanks: 13 Thanked 7 Times in 3 Posts	Update: a friend suggested switching to another fuel station to see if it would make a difference. I have now run a few tanks on another fuel station's fuel and the "hiccups" seem to have disappeared. I've now cleared the codes through TOAF, but code P1520 (in TOAF listed as "unknown error") won't clear. Do I just wait and see if everything remains ok or do I still need to look into whatever might be causing this P1520?

6th September 2021, 16:36	#7
EVS Regular poster Rover 75 1.8 Connoisseur SE Join Date: Jul 2020 Location: Flanders Posts: 68 Thanks: 13 Thanked 7 Times in 3 Posts	Alright, thanks, just wanted to confirm. Guess now I'll just have to wait and see if anything pops up again. If it doesn't, I imagine my former fuel station sells lesser quality fuel which caused the issue.

27th September 2021, 12:20	#8
EVS Regular poster Rover 75 1.8 Connoisseur SE Join Date: Jul 2020 Location: Flanders Posts: 68 Thanks: 13 Thanked 7 Times in 3 Posts	It seems the underlying problem persists... So far, I haven't encountered any "hiccups" while driving anymore, but check engine light has come back on with codes P0445 and P0420. Not sure if relevant, but the check engine light came on while on the motorway. I'm assuming the P0445 causes the P0420, so where do I best look to sort this issue?