Fault codes - what are they?

[Thom]

Hey guys, i just read the codes on my vectra c 2003 and i have absolutyl no idea what any of them mean really so in order to fix the huge list i was wondering if people could shed some light on any of these that they know?

I know that my inet manifold has an air leak, my CC has no clutch switch (because the wires have been linked up to bypass this) and my aircon doesnt work - but other than this i had no idea i had any faults!


B3115 - Remote-Key 2 Not Synchronized
(00) - Not present
B3700 - Wiper Interval Circuit Open or High Voltage
(04) - Not present
B3840 - Wrong Stalk Switch Configuration
(00) - Present
B3840 - <Unknown DTC>
(0F) - Present
B3794 - Switch Cruise Control Circuit Open or High Voltage
(04) - Present
B2657 - Illumination Circuit Malfunction
(00) - Not present
B3926 - Wrong Environment Identifier Received DDM (Driver Door Module)
(00) - Not present
U2105 - CAN-Bus No Communication with ECM (Engine Control Module)
(00) - Not present
U2108 - CAN-Bus No Communication with ABS (Anti-Lock Brake System)
(00) - Not present
U2111 - CAN-Bus No Communication With EHPS (Electro-Hydaulic-Power-Steering)
(00) - Not present
U2116 - CAN-Bus No Communication with IPC (Instrument)
(00) - Not present
U2141 - CAN-Bus No Communication with REC (Rear Electrical Centre)
(00) - Not present
U2113 - CAN-Bus No Communication with SDM (Sensing & Diagnostic Module, Airbag)
(00) - Not present
P0704 - Incorrect Clutch Switch Signal
(0F) - Not present
P0400 - Exhaust Gas Recirculation Valve Feedback Signal Malfunction
(F8) - Not present
P0400 - Exhaust Gas Recirculation Circuit Open
(04) - Not present
P0234 - Boost Pressure Control Circuit Negative Deviation
(5A) - Not present
U2103 - No Communication with CAN-Bus (High Speed)
(00) - Present
C1523 - System Voltage Low Voltage
(03) - Not present
C1526 - Motor Malfunction
(00) - Not present
C1531 - Steering Angle Sensor System Voltage Circuit Low Voltage
(03) - Not present
C1550 - Replace Electronic Control Unit (ECU)
(37) - Not present
U2105 - CAN-Bus no Communication with ECM (Engine Control Module)
(00) - Not present
U2105 - CAN-Bus ECM Message Range/Performance
(71) - Not present
U2139 - CAN-Bus No Communication with CIM (Steering Column Module)
(00) - Not present
U2107 - Invalid Data from BCM (Body Control Module)
(71) - Present
B2996 - Rear Left Door Switch Circuit Open or High Voltage
(05) - Present
B1375 - Switched System Voltage (Ignition ON) Circuit Malfunction
(00) - Not present
B3974 - Driver Door Select Switch Window Lifter Circuit Open or High Voltage
(05) - Present
U1420 - Radio Bus Communication SDA open
(04) - Present
U1421 - Radio Bus Communication SCL open
(04) - Present
U1422 - Radio Bus Communication MRQ open
(04) - Present
U1423 - Radio Bus Timeout Error
(72) - Present

[Critch]

Clear the faults and see what your left with. Theirs far too many to all be ther

[rich r]

Far too many there to make any sense of it. Also a lot of them relate to the ignition being turned on with some major connector unplugged (hence all the 'communication failure' ones. I suspect most of the faults that these codes relate to are now no longer present.

Clear the codes, then go for a test drive and then read the codes again.

[krisby]

My auto sparky got a massive list like that too, though I meant to ask him how, cos I can't see them, I can only see ECU alerts.
Are you getting the car and spanner light on your dash? I have it coming up too and from what we can tell it is not a malfunction per se, but a problem with the electronics. However, everything works on my car, cruise, A/C, etc etc. The only exception being a warning for front fog light and safeguard. My auto sparky had the CIM and dash out and reckoned the CIM had been bypassed with something soldered in the way, which is how he reckons the car and spanner is being thrown up.
But as everything works, or appears to, I can't see that being right, so I wonder if it is a result of being half can bus?
Let me know how you get on and I'll update you if I find anything too.

[markj23]

do you have the original head unit in the car ??

[krisby]

I do, though am looking to replace it, as easy job cos only half canbus. Or was that directed at OP? (most likely)

[sb1uk]

Someone is using an old copy of op-com to get a lit like that. Op-com old version picks up ever blip going as you can see. So get the code read by snap-on or tech 2 .

[krisby]

The first time he read it the errors didn't come up, and my code reader only finds the ECU ones, i.e. Pcodes, should a regular code reader also get the B,C and U codes as well? But he read it yesterday when I wasn't there so I don't know what he did it with, I know he has opcom, bosch, autodiagnosis, but perhaps he used his old copy of opcom and got all those errors.

[sb1uk]

Yes the old op-com picks up ever voltage drop as tech 2 and snap-on don't op-com the old verion geve me alist as long as you arm. But the new op-com does not it works perfect.

[rich r]

A generic code reader will only get the P ones (from the engine control unit), as the others are GM specific, so would require a code reader that knows how to interrogate the other control units. For example, Op-com and Tech2.