What is code p0204 - 2005 Cadillac CTS

I suggest you begin by servicing the engine including checking spark plugs, spark power and testing the injectors, fuel pressures, delivery volume, etc., with a thorough visual inspection of pipes, wires and connections.

Once done, erase the codes and go for a drive and see what codes come back. If any comes back it will be time to begin serious fault finding...

https://www.troublecodes.net/pcodes/p0202/

https://www.obd-codes.com/p0204

https://www.obd-codes.com/p0201

https://www.obd-codes.com/p0246

https://www.obd-codes.com/p0300

Re: P0204 and P0304 codes - Cadillac Forums

www.cadillacforums.com/.../cadillac-srx...2004/260084-p0204-p0304-c...
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More results from www.cadillacforums.com

http://www.ptcruiserlinks.com/forum/tech-performance-forum/45744-error-code-p0204.html

https://www.obd-codes.com/p0204

Hope this helps

check injector resistance and pattern on a scope. if you have the proper power and ground it could be dirty injectors or the possibility of bad injector drivers in the computer.

Hi, these are taken from the data sheets

P1523 - electronic throttle system (ETS) - throttle valve sticking - probable cause = mechanical fault, ECM

P0204 - injector 4 - circuit malfunction - probable cause = wiring, injector, ECM

P0206 - injector 6 - circuit malfunction - probable cause = wiring, injector, ECM

hope that helps

P0204 - Injector Circuit Malfunction Cylinder 4http://engine-codes.com/p0204.htmlForum CodePossible causes- Fuel Injector 4 harness is open or shorted
- Fuel injector 4 circuit poor electrical connection

- Faulty fuel injector
- Faulty Engine Control Module (ECM) Help with thisWhen is the code detected?The P0204 is set if the Engine Control Module (ECM) is detects a low or high voltage drop or resistance at the injector 4.

Read more: http://engine-codes.com/p0204.html#ixzz1ziP3Mqgy

https://www.obd-codes.com/p0204

Check the coil itself,or replace it.The e c m sends power to the coil,12 volts,but it also breaks the ground side of the coil to load it,to fire on time.

P0204 - Cylinder 4 Injector Circuit Malfunction

P0204 means that the Power Control Module (PCM) detected a fault in the injector or the wiring to the injector. It monitors the injector and when the injector is activated, the PCM expects to see the voltage pulled "low" or close to zero. When the injector is switched off, the PCM expects to see a voltage that is close to battery voltage or "high". If it doesn't see the expected voltage the PCM will set this code. The PCM also monitors resistance in the circuit. If the resistance is excessively low or high it will set this code.

The causes of a P0204 engine light code could be any of the following:

Bad injector. This is usually the cause of this code but doesn't rule out the possibility of one of the other causes
Open in the wiring to the injector
Short in the wiring to the injector
Bad PCM

Possible Solutions
First, using a DVOM check the resistance of the injector. If it isn't within specs, then replace the injector.
Check for voltage at the fuel injector connector. It should have 10 volts or more.
Visually check the connector for damage or broken wires.
Visually check the injector for damage.
If you have access to an injector tester, activate the injector and see if it operates. If the injector operates, then you likely have either an open in the wiring, or a blocked injector. If you do not have access to a tester, swap the injector with another one and see if the code changes. If the code changes, then change the injector.
At the PCM, remove the driver wire from the PCM connector and Ground the wire. (Make sure you have the correct wire. If you're not sure, do not attempt) The injector should activate
Replace the injector

P0830 Four Wheel Drive (4WD) Switch Circuit High
I can't find any solutions for this error code. You'll definitely need a mechanic to help wiht this code.

Injector # 4 Control Circuit.
Injector # 4 or INJ 4 injector bank output driver stage does not respond properly to the control signal.