Do I need a new MAP sensor?

thegreatdaddo · 5th December 2015, 20:28

The story so far - Had a high power momentary misfire on my 1.8T when accelerating at full throttle in 4th gear at about 4,000 rpm. Yes I like to have fun occasionally. Checked the ECU fault codes and found P0106 = MAP sensor out of range. I removed the sensor a few days later and found it was wet with what looked like engine oil. I am thinking this may indicate that the turbo is leaking oil into the inlet, although oil consumption is low and there is no blue smoke in the exhaust. My car has done 80,000 miles and is on the original turbo. I have always changed the oil every 12 months to prolong engine and turbo life. Any advice on what to do next would be appreciated.

Ste.Sales · 6th December 2015, 15:14

Are you sure the boost control solenoid is working correclty? Or the the more common vacuum pipes that connect it to the wastegate? Causes overboost at around 4000rpm And the ecu cuts fuel to protect the engine, then will resume up to redline.
Steve

thegreatdaddo · 6th December 2015, 21:26

I have changed the boost control solenoid but it has not made any difference. The pipes are original and look OK with no deterioration visible. Would a defect in the solenoid or pipes give a P0106 fault?

marinabrian · 6th December 2015, 22:08

Check carefully the wiring to where it enters the MAP sensor plug

Common fault on the 1800T, I have experienced this on several occasions.

Brian

Grumble and Grouch · 29th April 2017, 08:34

Quote:

Originally Posted by marinabrian

Check carefully the wiring to where it enters the MAP sensor plug

Common fault on the 1800T, I have experienced this on several occasions.

Brian

Big bump! Think this is my problem- the wires are very brittle and one is, I'm fairly sure, snapped but don't want to tug it! What do I actually need to do to sort it? I'm a bit useless so simple directions needed!
Thanks,
Mike

T-Cut · 29th April 2017, 09:12

Ignore - wrong thread!

TC

5th December 2015, 20:28	#1
thegreatdaddo Regular poster Rover 75 Tourer Join Date: Jul 2012 Location: Bristol Posts: 52 Thanks: 7 Thanked 6 Times in 6 Posts	Do I need a new MAP sensor? The story so far - Had a high power momentary misfire on my 1.8T when accelerating at full throttle in 4th gear at about 4,000 rpm. Yes I like to have fun occasionally. Checked the ECU fault codes and found P0106 = MAP sensor out of range. I removed the sensor a few days later and found it was wet with what looked like engine oil. I am thinking this may indicate that the turbo is leaking oil into the inlet, although oil consumption is low and there is no blue smoke in the exhaust. My car has done 80,000 miles and is on the original turbo. I have always changed the oil every 12 months to prolong engine and turbo life. Any advice on what to do next would be appreciated.

29th April 2017, 09:12	#6
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,753 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	Ignore - wrong thread! TC Last edited by T-Cut; 29th April 2017 at 09:16..

6th December 2015, 15:14	#2
Ste.Sales Avid contributor Rover 75 Saloon Join Date: Jan 2015 Location: Preston Posts: 233 Thanks: 9 Thanked 37 Times in 35 Posts	Are you sure the boost control solenoid is working correclty? Or the the more common vacuum pipes that connect it to the wastegate? Causes overboost at around 4000rpm And the ecu cuts fuel to protect the engine, then will resume up to redline. Steve

6th December 2015, 21:26	#3
thegreatdaddo Regular poster Rover 75 Tourer Join Date: Jul 2012 Location: Bristol Posts: 52 Thanks: 7 Thanked 6 Times in 6 Posts	I have changed the boost control solenoid but it has not made any difference. The pipes are original and look OK with no deterioration visible. Would a defect in the solenoid or pipes give a P0106 fault?

6th December 2015, 22:08	#4
marinabrian MG ZT Join Date: Jan 2011 Location: Newcastle Upon Tyne Posts: 20,151 Thanks: 3,565 Thanked 10,837 Times in 5,718 Posts	Check *carefully* the wiring to where it enters the MAP sensor plug Common fault on the 1800T, I have experienced this on several occasions. Brian