HI, as yall know ive been hunting down problems on my 04. Today i fixed several. I Got the New wheel speed sensor from ebay for less than half of what the dealership charges. It works. THis eliminated the ABS & Trac warning lights and DSC & Cruise messages. It also seems to ride smoother now for whatever reason (maybe its in my head)...... There is stilll a check engine light. I had the codes read at Advanced Auto here is what they found.

P0171 Lean Bank 1
P0101 MAF
P0327 Knock Sensor Bank 1
P0332 Knock Sensor Bank 2
P0701 Transmission Control

Ive cleaned the MAF with MAF spray cleaner, and cleaned the Trottle body aswell last week. If its running lean it would bee getting too much air so would that be the same as not getting enough fuel (like a bad injector)? I have ran 2 tanks of 93 Octane with Fuel System cleaner and apperently that hasnt helped because now i am getting this Knock Sensor code which hadnt appeared previously.
Could this be just a bad MAF, bad injector or all of the above?

And the Tansmission seems to operate just fine. Ive asked the Tech at the Jag place and he said they dont even mess with the Tranmission unless its causing big problems like slipping or not working. Even though ive read your supposed to have it recalibrated or flushed or something.

 

Hi Bobby,

I wouldn't be surprised if you have a lot of other codes stored too. Generic OBDII scanners like the ones used by the auto parts stores and most mechanics can only read the Powertrain (P) codes. The proprietary Jaguar codes require a dealer-level scanning system or a high-end system like AutoEnginuity with an additional Jaguar module. It is likely that you have Chassis (C), Body (B) and Network (U, and/or Undefined) codes also stored.

The most common cause of multiple seemingly unrelated codes is a low battery voltage, typically because the battery output is sagging while cranking the engine, but possibly due to corrosion on one or more electrical connectors. Your battery may be past its prime, your charging system may be malfunctioning, or you may have corrosion on one or more electrical connectors or ground points. If your car still has its original battery, that would be the first thing to have tested (especially the voltage sag while cranking).

If you can find a local independent Jaguar mechanic who has a system capable of reading all the stored codes, I would suggest making a record of all the codes, then clearing them and waiting to see which ones recur. Those will be the only ones you need to sort out. All the others will just be spurious.

If you have a Windows XP or 7 32-bit laptop, for about $50.00 you can acquire an OBDII-to-USB interface cable and a copy of the Jaguar Land Rover System Driven Diagnostics (JLR SDD) dealer-level system that will allow you to read and clear all the proprietary Jaguar codes yourself.

I'll be curious to hear what other members think.

Please let us know which codes come back after you have them cleared.

Cheers,

Don