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  1. P0128 and battery light

    Range Rover Mark III / L322
    Hey, I'm posting these two problems in one post as I'm not sure if they are related. P0128 - I'm thinking is caused by stuck thermostat. The car takes longer than usual to warm up. At this point I'm considering replacing it myself but I know it can be a lot of hassle - depending on where exactly...
  2. P0128 - Thermostat replaced - still intermittently failing

    Range Rover Mark III / L322
    Hi Everyone, I had a shop replace the thermostat in my 2006 Range Rover Supercharged. 144k miles on the vehicle. Fault codes prior to dropping it off were P0171, P0174 and P0128. Shop replaced the thermostat ($560 total) and stated when they performed a test drive P0128 came back. They...
  3. P0128 OCVM thermostat replacement

    Range Rover Mark III / L322
    I was getting CEL fault P0128. Replaced the thermostat but still getting the same code on a regular basis. Picked up the hose thermostat (PCH501310G) and wondered if anyone else has done that as a DIY project. If so, any helpful tips, specific tools or unexpected surprises? thanks in advance.
  4. Need help with error code P0128 & P0171

    Range Rover Mark III / L322
    Hello all, This is my first post in the forum. Here is a little background on the issue: I have a full sized range rover HSE 2006. About 3 months ago my MIL came on with the code P0128, Coolant Temperature Below Thermostat Regulating Temperature. After researching on the net I decided to change...
  5. P0128 on 2006 non SC

    Range Rover Mark III / L322
    Code P0128 - Coolant Temperature Below Thermostat Regulating Temperature I cant get CEL to go away, its intermittent..... Replaced the thermostat twice, once by me once by the dealer... Replaced the coolant temp sensor... New expansion tank, new coolant... Nothing
  6. P0128- Fault Code

    Range Rover Mark III / L322
    Just got the thermostat replaced after seeing the fault code P0128/check engine light. Two weeks later, the same fault code reading...In addition, when I turn my truck on it reads "check coolant level." Which made me think that it's a sensor, but I know that the coolant sensor won't cause the...
  7. 06 HSE: P0128 & Low Coolant Level message

    Range Rover Mark III / L322
    Hello, I just purchased an 06 HSE and I get: 1- Intermittent "Check Coolant Level" message on the dashboard 2- Check Engine sign with cod P0128: Coolant Theromostat (Coolant Temperature Below Thermostat ..) The coolant level is okay and it is using brand new coolant from the dealer...
  8. P0128 after several thermostat replacements!

    Range Rover Mark III / L322
    Hello All!! I replaced my OEM thermo. for the alternative thermo. by Sebastian ( Ebe Automotive), but kept getting the dreaded "check engine " light with P0128 code. Soo, I went back to the a new original thermostat, but I'm still getting the same P0128 code!!! Could it be that the new one...
  9. P0128, p0171, p0174, p0175

    Range Rover Mark III / L322
    I have a 2006 RR HSE non supercharged. Approximately 83,000 miles. Everything seemed to be going fine, and then bam the CEL came on. Went by the auto parts store and the codes P0128, P0171, P0174 and P0175 were all coming up. Is their a likely culprit that could cause all these codes to pop...
  10. 2006 RR HSE with P0480 and P0128 codes

    Range Rover Mark III / L322
    The check engine light came on this morning and after stopping at Autozone to have the codes pulled, I am slightly puzzled as to the actual problem. -P0480 explanation: The engine cooling fan relay circuit is monitored for opens and shorts. Probable cause: Cooling fan relay defective. Check...
  11. Recurring P0128 T-Stat CEL

    Range Rover Mark III / L322
    A few weeks ago I started getting the generic P0128 CEL code. After reading in the workshop manual it appears that either A.) my fluid was contaminated B.) My T-Stat was failing or C.) my ECT sensor was failing. I went ahead and replaced the thermostat AND the gasket and topped off the fluid but...
  12. CEL with a P0128 code

    Range Rover Sport / L320
    My '06 Sport has a CEL. Got a P0128 code. Replaced thermostat and gasket. The CEL is still on. Will it go away after a drive or is there another issue. I think maybe coolant temp sensor?? ANy ideas?