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A Slew of new Durametric codes with the Ex-Wife's 2004 CTT - Advic


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Was away for the holidays and when I got back to MIami, the Ex told me that her 2004 CTT with 84K miles on it had a number of warning lights on the dash. So I got out my trusty Durametric kit, attached it to the PC and pulled the codes. For some background, we are looking to keep it for probably another year or two unless it starts getting crazy expensive with the repairs (we have had it for six years). So really just concerned about issues that will cause short/medium term problems and or safety related issues.

It is her daily driver which is mostly just city driving with 1-2 road trips a year. I just installed a new battery (many thanks for whoever posted the information on how to change it) so am pretty sure not a battery issue causing the rash of codes.

Any help with what the codes below would be greatly appreciated.

P0441
Evaporative Emission System
Incorrect Purge Flow

P0234
Turbo/Super Charger Overboost
Condition

P1914

Brake booster pressure sensor

P2189
System at Idle Bank 2

P2187
System at Idle Bank 1

1276

PSM - Hydraulic pump

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P0441 Fuel tank ventilation system above limit value/below limit value
Possible cause of fault
- Tank vent faulty (remains stuck in an open or closed position)
- Tank vent installed the wrong way round
- Leak in scavenging lines between tank vent and positive crankcase ventilation (in the Turbo via a T-piece also on the intake side of the turbocharger)
- Scavenging lines between tank vent and positive crankcase ventilation trapped or blocked (in the Turbo via a T-piece also on the intake side of the turbocharger
P0234 Boost Pressure Control Limit Exceeded - Above Limit
Possible fault cause
- Leak ahead of throttle (less than 4 mm)
- Boost pressure control solenoid mechanically faulty
- Bypass valve (waste gate) faulty
P1914 Brake Booster Pressure Sensor – Signal Implausible/ No Signal
Possible cause of fault
- Open circuit in sensor wire
- Connector removed from brake booster pressure sensor
- Disconnection point KE2, pin 5 disconnected
- Brake booster pressure sensor faulty
- DME control module faulty
P2189 Oxygen Sensing Adaptation, Idle Range, Bank 2 (RKAT2) - Above Limit
Possible fault cause
- Incorrect main charge signal
- Intake air system leaking
- Fuel pressure too low
- Volume supply of fuel pump too low
- Mechanical fault in injection valves
- PCV valve leaking
- Cap of oil filler neck leaking
- Leaks in exhaust system
- EVAP canister purge valve mechanically faulty (hangs open)
- EVAP canister purge valve output stage faults
P2187 Oxygen Sensing Adaptation, Idle Range, Bank 1 (RKAT1) - Above Limit
Possible fault cause
- Incorrect main charge signal
- Intake air system leaking
- Fuel pressure too low
- Volume supply of fuel pump too low
- Mechanical fault in injection valves
- PCV valve leaking
- Cap of oil filler neck leaking
- Leaks in exhaust system
- EVAP canister purge valve mechanically faulty (hangs open)
- EVAP canister purge valve output stage faults

P1276 Hydraulic Pump (PSM)

Possible fault cause
- Plug connection to PSM control module is coroded or damaged
- Hydraulic pump faulty
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I would fix the P0441 first, clear the codes, then see what comes back. A fairly easy DIY, there is a tutorial in the DIY section on here. 94811020201, about $80 from the dealer with a new short hose piece attached. Also check all of your vacuum lines to see if there is anything un-attached or broken but the P0441 purge valve is a common known failure.

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Thanks for all the advice, I dropped the car off at my local mechanic (along with a printout of all your suggestions). pugs2bb you were correct, upon further testing on the ABS unit he found another broken booster line.

Not sure why they are going bad, maybe the hot weather here in Miami or perhaps my coolant pipes blew about a year ago so not sure if that may have done any damage to the hoses or not.

Any suggestions besides old age - I just turned 53 last week so I guess the joke is on me :)

Will work on the other codes later but at least it got my ex of my back for the next 72 hours :)

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