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Home > Technical > TDV8 - Stuttering / Mis-fire Engine - DTC Code P02B4 / U0402

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Linko

Member Since: 10 Sep 2010
Location: Shropshire
Posts: 61

2007 Range Rover Sport TDV8 HSE Cairns Blue

TDV8 - Stuttering / Mis-fire Engine - DTC Code P02B4 / U0402

Help!

Over the last couple of days my car has been stuttering when I am doing around 30mph and around 2000rpm as if it's struggling a little.

I've been able to connect to the OBD-II port and check for error codes, which are:

Anybody had this experience? Are the 2 codes linked?

Is it possible to check the injector and clean or should I play safe and take it to the dealer?

Cheers,

Mark

Wed May 11 2011 10:33am

awd man

Member Since: 30 Nov 2010
Location: Malmesbury
Posts: 3355

2007 Range Rover Sport TDV8 HSE Java Black

not linked I'd say.

Mine had the U0402 error a while back, turned out to be tracking linked.

Your misfire is more likely the injector issue. RRS gone
Audi SQ5...Gone Audi Q7 S-Line 240 3.0TDI Gone
Audi A6 Allroad Sport 270 3.0TDI

Wed May 11 2011 11:05am

Linko

Member Since: 10 Sep 2010
Location: Shropshire
Posts: 61

An update for anyone that happens to run in to the same problem.

Regarding the P02B4 Injector Restricted code. The injector was replaced and it didn't make a blind bit of difference. the car still felt like it mis-fired around the 2000rpm point when under accelaration.

Took the car back and had a... 'discussion' with the dealer principle! He gave me a courtesy car and promised to get it sorted. A week later... yes a WEEK later I was told it seems that the Torque Converter in the auto box was slipping. Told about a double flush which has a 90% chance of success or new torque converter at £900 + VAT & +Labour.

Went for the double flush, with an addative to help lubricate the torque converter. I have seen (thanks to SRE) this http://www.disco3.co.uk/forum/topic47485.html thread from the Disco3 site. The symptoms seem exactly the same as what i've been suffering.

Picked the car up today and was told that I may still notice the 'judder' for the next 100 to 150 miles whilst the additive gets to work. Fingers crossed!

Mon Jun 06 2011 7:18pm

gazellio

Member Since: 13 Sep 2011
Location: Chilterns, UK
Posts: 61

Any update?

Sat Feb 14 2015 2:51pm

Bodsy
Site Sponsor

Member Since: 03 Feb 2007
Location: Shropshire
Posts: 2162

I know linko sold it since, but he also had replacement torque converter as it didn't fix the issue. Bodsys Brake Bible
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Sat Feb 14 2015 3:16pm

Linko

Member Since: 10 Sep 2010
Location: Shropshire
Posts: 61

Yeah... As Bodsy said the flush didn't fix it. In the end the torque converter was replaced and a load of other stuff as it a glycol leak from the radiator.

It was about £2.5k in the end. Fortunately it was taken care of by the warranty and some negotiation with the Service Manager.

Sat Feb 14 2015 7:23pm

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