Hello,

I have a 2004 5.4l XLT with 206,000 miles. I have been getting the dieseling issue so I replace or had replaced the Phasers, timing set and guides, all spark plugs all coils, alternator and battery, MAF.

after all that it would run great for about 15mins then the dieseling would come back. also the truck would bog down and run like crap between 1200 and 1700 RPM.

Yesterday on my way to the store it went in to a limp mode and wouldn't go past 1500 RMPish. it soon stalled and wont fire back up.

Here are the codes that come off of it. the A camshaft sensor have been around for a while and a new sensor dosent fix it.


Please help!

P0171 - System Too Lean
Pending: P0011 - "A" Camshaft Position - Timing Over-Advanced or System Performance
Pending: P0021 - "A" Camshaft Position - Timing Over-Advanced or System Performance
Pending: P0171 - System Too Lean
Pending: P0175 - System Too Rich
Pending: P0340 - Camshaft Position Sensor "A" Circuit
Pending: C0500 -
P0171 - System Too Lean
P0340 - Camshaft Position Sensor "A" Circuit
Pending: P0011 - "A" Camshaft Position - Timing Over-Advanced or System Performance
Pending: P0021 - "A" Camshaft Position - Timing Over-Advanced or System Performance
Pending: P0022 - "A" Camshaft Position - Timing Over-Retarded
Pending: P0171 - System Too Lean
Pending: P0175 - System Too Rich
Pending: C0003 -
Pending: C0500 -
P0171 - System Too Lean
P0340 - Camshaft Position Sensor "A" Circuit
Pending: P0011 - "A" Camshaft Position - Timing Over-Advanced or System Performance
Pending: P0021 - "A" Camshaft Position - Timing Over-Advanced or System Performance
Pending: P0022 - "A" Camshaft Position - Timing Over-Retarded
Pending: P0175 - System Too Rich
Pending: P0345 - Camshaft Position Sensor "A" Circuit
Pending: B1800 -

 

looks like a bad sensor...have you replaced it ??