 | Home > Technical > does it apply to defender 90 -2009 puma |
 
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 16884   
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P167B is the DTC generated when the ECU believes for some reason that it has no calibration data (or incorrect calibration data) for the injectors, however unfortunately no-one outside of Landrover (or more likely Ford) actually knows what causes the ECU to come to this conclusion.
If the engine seems to be running OK and it is only the presence of the DTC which has alerted you to this, then I suggest clearing the fault and seeing if it comes back - it may well not come back. If the engine is running rough and you have reason to believe that there genuinely is something wrong, then carry out an injector relearn (AKA pilot jet correction) cycle with a diagnostic system. This will cause the ECU to relearn the characteristics of the individual injectors. In extreme cases it may be necessary to re-enter the hexadecimal calibration codes whcih are stamped on the injectors themselves, though this is unusual unless you've cvhanged either the ECU or the injectors. The P167B code (injector learn not completed) is often associated with P268B (pump learn not completed) and P0089 (PCV leaking) and are all indicative of some kind of event taking place within the high pressure part of the fuel system (ie HP pump stage, HP common rail, or injectors). The single most common cuase of problems in this area is the Volume Control Valve on the fule pump, which regulates the flow of fuel from the LP stage of the pump to the HP stage and hence regulates the supply to the common rail, which is a rather fragile component. If you do have a recurring fault, it is the first place I would look. |
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4th Feb 2015 10:40am |
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| Albert s Member Since: 20 Oct 2013 Location: Nth lincs Posts: 41 
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Thanks very much for a very comprehensive reply !
Albert S  |
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4th Feb 2015 11:16am |
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| Porny Site Sponsor Member Since: 31 Aug 2009 Location: Sutton Coldfield - West Midlands Posts: 789 
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If the process hasn't been done... then its a permanent fault. Clearing it will not work.
You need somebody with the correct LR diagnostic kit to do the pump learn followed by the pilot injector learn. The set-up of the fuel system is critical for correct running and long term durability on a Puma Engine. IRB The home of the first modified Keswick Green 90 - and the first 2.4 Puma through both the 200bhp and 550Nm barriers. www.IRBdevelopments.com www.facebook.com/irbdevelopments www.integrated316.com www.facebook.com/integrated316 |
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4th Feb 2015 1:55pm |
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| Albert s Member Since: 20 Oct 2013 Location: Nth lincs Posts: 41
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Thanks - is nothing easy with a land rover - Does that mean I have to use land rover dealer to correct ?
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4th Feb 2015 2:01pm |
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| Porny Site Sponsor Member Since: 31 Aug 2009 Location: Sutton Coldfield - West Midlands Posts: 789
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A dealer or good independent specialist with dealer level diagnostic kit.
How far are you from Brigg/Hibaldstow? As I'm up that way quite often and could bring my laptop with me. Regards IRB The home of the first modified Keswick Green 90 - and the first 2.4 Puma through both the 200bhp and 550Nm barriers. www.IRBdevelopments.com www.facebook.com/irbdevelopments www.integrated316.com www.facebook.com/integrated316 |
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4th Feb 2015 2:18pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 16884
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I meant to include in my post that some diagnostic tools won't do the recal on either the pump or the injectors. Nanocom, for example, can clear the fault but not carry out a recal if that is needed. Faultmate however can do all of this.
Porny, do you have any idea what makes the ECU decide that (either a pump or injector) relearn is needed? Obviously if the engine has never been calibrated and there is no calibration data in the ECU, i.e., a new vehicle or new ECU, it will know, but if the vehicle has been running, even if components are changed, what does it actually detect that makes it determine that the process is needed? I cannot see how once there is any calibration data stored in the ECU it can legitimately produce a P167B DTC! In Albert's case I was rather assuming that the vehicle has been running OK, and that no components have been changed recently, which suggests to me that is more likely that the fault is not due to a lack of calibration but rather some kind of transient occurrence, and clearing the fault may be sufficient. |
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4th Feb 2015 2:28pm |
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| Albert s Member Since: 20 Oct 2013 Location: Nth lincs Posts: 41
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Hello thanks for your input note:
The fault showed itself about a month ago , the landy was running with no problems then yesterday the eml showed itslf again and currently being relooked at the local garage, note again no running fault showing. Albert S |
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4th Feb 2015 3:05pm |
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| Porny Site Sponsor Member Since: 31 Aug 2009 Location: Sutton Coldfield - West Midlands Posts: 789
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Either it's a had a replacement ECU that was not set up properly, it's had a calibration update and the pilot learn bit was cancelled (as technician was in a rush), or it has never been done and checked at PDI from new.
Most of the time it comes down to lazy dealers/technicians. I need to double check, but I don't think you get a MIL straight away for Pilot learn not done. IRB The home of the first modified Keswick Green 90 - and the first 2.4 Puma through both the 200bhp and 550Nm barriers. www.IRBdevelopments.com www.facebook.com/irbdevelopments www.integrated316.com www.facebook.com/integrated316 |
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4th Feb 2015 3:11pm |
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