- Joined
- Oct 30, 2008
- Messages
- 207
- Points
- 113
Hi again all
So, the 07 1.2 8v Grande Punto my daughter bought earlier this year, has failed the MOT (NCT here in Ireland) twice in the last month on emissions
After the first failure, I advised her to put in some petrol additive and drive the car hard for a few days, as it never gets a decent drive during the week. She travels maybe 1-2 miles to work and the same home, and some short drives on the weekend, but rarely more than 5 or 10 miles
Initially when we bought the car, the engine light was on, but the guy I bought it from, told me it passed the test every year, despite the light staying on. I read the code at that time, and it gave a P0135 code relating to the heater circuit for the pre cat oxygen sensor. We put it through the test in February, and sure enough, it passed with no problems with emissions.
This time, the HC and CO figures are way off and the lambda reading is very low, so after 2 fails, I got the car back from her, read the codes, and now there are 3 codes showing
P0135 Heater circuit Bank 1 Sensor 1
P0141 Heater circuit Bank 1 Sensor 2
P0443 Evaporative Emission Control System Purge Control Valve
As my son previously had 3 Mk2 Puntos, I took off both oxygen sensors, and then what I understand to be the Purge Control Valve, from one of his old cars which is no longer running.
I changed the purge valve, and then tried to educate myself on how to read oxygen sensors with a mulitmeter
From my tests, both of the oxygen sensors in her car, seem to read approx 10 ohms on the heater circuit, so it would appear that they are actually ok, so I haven't changed them yet, but despite using Torque to clear the engine codes, and running the car etc, all 3 codes re-appear instantly once I read again
I am now wondering if all 3 of these errors share a common fuse or wiring, or just in plain English....where to go from here??
Some guys I know were telling me to change the precat sensor, others saying both, others saying change the catalytic converter, but as it's a 12 year old car, there is no point in stupidly throwing lots of parts at it and hoping that one off them might fix it!
I'd really appreciate any help I can get on this.
Btw, I don't own a copy of Multiecuscan, or have the correct cables for it, and as the re-test is due again in a few days, I would never get it in time from the UK to Ireland, so for the time being, I'm going to see if anybody can help before the last date she can bring it for re-test without having to pay full price for a new test again
So, the 07 1.2 8v Grande Punto my daughter bought earlier this year, has failed the MOT (NCT here in Ireland) twice in the last month on emissions
After the first failure, I advised her to put in some petrol additive and drive the car hard for a few days, as it never gets a decent drive during the week. She travels maybe 1-2 miles to work and the same home, and some short drives on the weekend, but rarely more than 5 or 10 miles
Initially when we bought the car, the engine light was on, but the guy I bought it from, told me it passed the test every year, despite the light staying on. I read the code at that time, and it gave a P0135 code relating to the heater circuit for the pre cat oxygen sensor. We put it through the test in February, and sure enough, it passed with no problems with emissions.
This time, the HC and CO figures are way off and the lambda reading is very low, so after 2 fails, I got the car back from her, read the codes, and now there are 3 codes showing
P0135 Heater circuit Bank 1 Sensor 1
P0141 Heater circuit Bank 1 Sensor 2
P0443 Evaporative Emission Control System Purge Control Valve
As my son previously had 3 Mk2 Puntos, I took off both oxygen sensors, and then what I understand to be the Purge Control Valve, from one of his old cars which is no longer running.
I changed the purge valve, and then tried to educate myself on how to read oxygen sensors with a mulitmeter
From my tests, both of the oxygen sensors in her car, seem to read approx 10 ohms on the heater circuit, so it would appear that they are actually ok, so I haven't changed them yet, but despite using Torque to clear the engine codes, and running the car etc, all 3 codes re-appear instantly once I read again
I am now wondering if all 3 of these errors share a common fuse or wiring, or just in plain English....where to go from here??
Some guys I know were telling me to change the precat sensor, others saying both, others saying change the catalytic converter, but as it's a 12 year old car, there is no point in stupidly throwing lots of parts at it and hoping that one off them might fix it!
I'd really appreciate any help I can get on this.
Btw, I don't own a copy of Multiecuscan, or have the correct cables for it, and as the re-test is due again in a few days, I would never get it in time from the UK to Ireland, so for the time being, I'm going to see if anybody can help before the last date she can bring it for re-test without having to pay full price for a new test again
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