Question about 1998 Cadillac DeVille

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I have got a 98 Cadillac deville Sts engine light on, T.S.C(trouble shooting Code)P0 202, P0203, P0205. P0208, P0202 P, P0203, P0205, P0(Open fuel Injector Circuit 202, 203, 205, 208) Brand New Fuel Injector(Brand New)Oxygen Sensor and still has these codes how do i solve the open injector fuel problem on these 4 cylinders please help !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! please email me at this address (

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SOURCE: 1996 cadillac deville service engine soon light on,

these are under that big silver plate looking thin remove it and look for eight of these all the same with a rail going to all of them, and a wire plug in,u may have one unpluged or cut or melted or something but one of them is not getting signal from wire

Posted on Jun 27, 2009

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SOURCE: fuel regulator circuit open - trouble code. What

replace fuel pressure regulator, clean fuel injection system

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SOURCE: 2003 cadillac deville rough idle with blinking ses

have the head gasket checked,pretty common on these

Posted on May 07, 2010

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SOURCE: 2001 Caddie STS trouble code P0308 which is No. 8

Yes this is a common accurance which is usually fixed by running injection cleaner in a full tank of gas.....Hope this helps.

Posted on Oct 12, 2010

  • 17970 Answers


A miss #4 may mean that one or more of the following has happened:
* Faulty spark plug or wire
* Faulty coil (pack)
* Faulty oxygen sensor(s)
* Faulty fuel injector
* Burned exhaust valve
* Faulty catalytic converter(s)
* Running out of fuel
* Poor compression
* Defective computer

If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back. If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

A couple of things you need to check here. First make sure you don't have any vacuum hoses unplugged. Next make sure the throttle blade closes all the way. It is probably not either of those things but you need to make sure. Next remove the Iac valve from the throttle body. It is on the side facing the front higher than the tps sensor. It has a 4 wire connector. Make sure this is clean. If it is not clean it. This valve controls the idle speed. After cleaning it turn the ignition on with the engine off. The IAC shouldmove in and out to find the stops. If it does not move you have either bad wiring, IAC (Idle Air Control valve) or PCM.

Does the IAC move back and forth? Also does your Throttle blade close all the way? The throttle blade is inside the Throttle Body. Take off the rubber intake hose and look inside the blade should be closed. Check to see if the IAC is moving by taking it out. hook up the connector and turn the ignition on with the engine off. The IAC should move in and out to learn the stops.

If the blade is open It is stuck. Check the throttle cable to make sure you have slack. If there is slack and the blade won't close try cleaning it to free the blade up. If there is no slack remove the cable from the blade to see if it closes farther. If it does your cable is bad. I still think your IDLE system is more likely though.

If nothign occurs, that is not the throttle blade. You need to check the IAC. Also try while the engine is abnormally idling high wiggle the connector at the IAC. If that doesn't work you need to check the wires from the PCM to the IAC, it could also be a bad PCM driver. You diagnose a PCM by eliminating everything else.

Keep us updated.

Posted on Jan 05, 2011

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First codes were 201 300 301 put in reman comp. codes were202 300 302 another reman comp code is 203. are the remans bad or other problem

You mean P0202 , an what engine does yours have ? 2.6 L ,3.3 L , 3.6 L or 5.7 L ?
DTC P0201, P0202, P0203, P0204, P0205, or P0206
The engine control module (ECM) enables the appropriate fuel injector on the intake stroke for each cylinder. Ignition voltage is supplied directly to the fuel injectors. The ECM controls each fuel injector by grounding the control circuit via a solid state device called a driver. The ECM monitors the status of each driver. If the ECM detects an incorrect voltage for the commanded state of the driver, a fuel injector control DTC sets.
Test your fuel injector for cylinder #3 ! Do you know how to do that ?
You probably changed computers for nothing ! Check out this video on testing fuel injector circuits an checking computer driver that controls the injectors , Oh , by the way P0300 P0301 an P0302 are misfire codes , P0300 is a random misfire an the other two are for cylinders 1&2
Testing Fuel Injectors Fast PCM Driver Testing II without scan tool Did you just replace the PCM - engine computer ? Didn't test anything !

Apr 06, 2015 | 2004 Cadillac CTS

2 Answers

Hyundai santa fe 2001

Car error codes::

Diagnostic Trouble Code Storage Condition Remedy
P0100 Mass Air Flow Sensor Voltage High C-8
P0100 Mass Air Flow Sensor Voltage Low C-8
P0110 Intake Air Temperature Voltage High C-10
P0110 Intake Air Temperature Voltage Low C-10
P0115 Coolant Temperature Voltage High C-9
P0115 Coolant Temperature Voltage Low C-9
P0120 Throttle Position Sensor (TPS) Voltage High C-7
P0120 Throttle Position Sensor (TPS) Voltage Low C-7
P0130 O2 Sensor 1 Circuit Voltage High C-30
P0130 O2 Sensor 1 Circuit Voltage Low C-30
P0130 O2 Sensor 1 Open Circuit C-30
P0150 O2 Sensor 2 Circuit Voltage High C-31
P0150 O2 Sensor 2 Circuit Voltage Low C-31
P0150 O2 Sensor 2 Open Circuit C-31
P0201 Injector Valve 1 Voltage High C-20
P0201 Injector Valve 1 Voltage Low C-20
P0201 Injector Valve 1 Open Circuit C-20
P0202 Injector Valve 2 Voltage High C-21
P0202 Injector Valve 2 Voltage Low C-21
P0202 Injector Valve 2 Open Circuit C-21
P0203 Injector Valve 3 Voltage High C-22
P0203 Injector Valve 3 Voltage Low C-22
P0203 Injector Valve 3 Open Circuit C-22
P0204 Injector Valve 4 Voltage High C-23
P0204 Injector Valve 4 Voltage Low C-23
P0204 Injector Valve 4 Open Circuit C-23
P0205 Injector Valve 5 Voltage High C-24
P0205 Injector Valve 5 Voltage Low C-24
P0205 Injector Valve 5 Open Circuit C-24
P0206 Injector Valve 6 Voltage High C-25
P0206 Injector Valve 6 Voltage Low C-25
P0206 Injector Valve 6 Open Circuit C-25
P0230 Fuel Pump Relay Voltage High C-6
P0230 Fuel Pump Relay Voltage Low C-6
P0230 Fuel Pump Relay Open Circuit C-6
P0325 Knock Signal Circuit 1 C-26
P0330 Knock Signal Circuit 2 C-26
P0335 No Engine RPM Signal C-32
P0335 Incorrect RPM Signal C-32
P0340 Hall Sensor Voltage High C-15
P0340 Hall Sensor Voltage Low C-15
P0403 EGR Valve Voltage High C-28
P0403 EGR Valve Voltage Low C-28
P0403 EGR Valve Open Circuit C-28
P0410 Secondary Air Pump Voltage High C-27
P0410 Secondary Air Pump Voltage Low C-27
P0443 Fuel Tank Ventilation Valve Voltage High C-29
P0443 Fuel Tank Ventilation Valve Voltage Low C-29
P0443 Fuel Tank Ventilation Open Circuit C-29
P0500 Vehicle Speed Signal C-42
P0505 Idle Air Control Voltage High C-33
P0505 Idle Air Control Voltage Low C-33
P0550 Power Steering Voltage High C-14
P0550 Power Steering Voltage Low C-14
P0560 Battery Voltage High C-4
P0560 Battery Voltage Low C-4
P0602 Control Module Programming Error C-2
P1110 Intake Manifold Valve 1 Voltage High C-34
P1110 Intake Manifold Valve 1 Voltage Low C-34
P1111 Intake Manifold Valve 2 Voltage High C-35
P1111 Intake Manifold Valve 2 Voltage Low C-35
P1230 Power Supply Relay Secondary Circuit C-3
P1405 EGR Valve Feedb. Voltage High C-28
P1405 EGR Valve Feedb. Voltage Low C-28
P1405 EGR Valve Feedb. Incorrect Signal C-28
P1501 Immobiliser No or Wrong Coding C-5
P1502 Immobiliser No Signal C-5
P1503 Immobiliser Wrong Signal C-5
P1530 A/C Relay Voltage High C-41
P1530 A/C Relay Voltage Low C-41
P1600 Reprogram or Replace Electronic Control Unit (ECU) C-2
P1602 Knock Control Module; Replace ECU C-2
P1690 Check Light Voltage High C-43
P1690 Check Light Voltage Low C-43
P1690 Check Light Open Circuit C-43
P1740 Torque Control Voltage Low C-40
P1740 Continuous Torque Control C-40

These are the error codes:

Jul 08, 2008 | 2001 Hyundai Santa Fe

1 Answer

How can I be sure if my PCM is bad???

I would try disconnecting battery again. Disconnect both cables and touch them together for a few seconds. This will reset all modules. Wierd that you had so many codes after just disconnecting battery. Sometimes very hard to tell if ecm is bad.

Dec 01, 2014 | 2006 Pontiac Torrent

1 Answer

I have this code P2096 on a 2005 Cadillac sts (6cylinder) I have replaced both catalytic converters and oxygen sensors and the light will not go off, thus will not pass Pennsylvania inspection! HELP -

Trouble Code: P2096

Downstream Fuel System 1/2 Lean
Possible Causes:

Exhaust leakEngine mechanical problemO2 Sensor has failedO2 Sensor signal circuit or return circuit problemFuel contamination

Oct 01, 2014 | 2005 Cadillac STS

1 Answer

What is the problem when u havew an open injector circuit on a 2005 cadillac cts with a 3.6

P0202 Cylinder 2 Injector Circuit Malfunction

The above link explains what code P0202 indicates. The problem could a bad injector or wiring to it or the plug connected to the injector, First thing is check the wire connector at the injector.

May 31, 2014 | 2005 Cadillac CTS

1 Answer

This 1999 dodge 1500 5.9l will start and run fine till about 1500 RPM and then misfires and pings severely. [ CHRYSLER ] Record1 -> 1998~2003 -> PCM -> ECU Information Module of year: ...

Hello.. looks like you are getting good fuel delivery. Is the fuel curve mixture on the scanner in specs? How is the timing, the timing chains on these engines will stretch and throw the timing off causing a ping and missfire -- a weak valve spring is something to consider. Also, the PCM may be faulty. I hope this helps.

Sep 27, 2011 | 1999 Dodge Ram

1 Answer

I have 1996 Dodge Gran Caravan, and it gives me these codes: 27 and 43, what do they mean??

CODE 27 - Injector Control Circuit, output driver does not respond properly to the control signal

Code 27 MIL light options: OBDII
P0201 - Injector #1 Control Circuit
P0202 - Injector #2 Control Circuit
P0203 - Injector #3 Control Circuit
P0204 - Injector #4 Control Circuit
P0205 - Injector #5 Control Circuit
P0206 - Injector #6 Control Circuit

CODE 43 - Cylinder Misfire, or Ignition Primary Circuit

CODE $# MIL options: OBDII
P0300 - Multiple Cylinder Misfire
P0301 - Cylinder #1 Misfire
P0302 - Cylinder #2 Misfire
P0303 - Cylinder #3 Misfire
P0304 - Cylinder #4 Misfire
P0305 - Cylinder #5 Misfire
P0306 - Cylinder #6 Misfire
P0351 - Ignition Coil #1 Primary Circuit
P0352 - Ignition Coil #2 Primary Circuit
P0353 - Ignition Coil #3 Primary Circuit

Feb 03, 2010 | 1996 Dodge Caravan

1 Answer

Code po741 on a cadillac deville dhs 2001

P0741 Torque Converter Clutch Circuit Performance or Stuck Off

Your car actually has a viscous converter clutch inside the torque converter instead of a (mechanical) torque converter clutch to lock up the torque converter for fuel economy improvement. You will see it referred to as the VCC and/or TCC.....

The TCC/VCC has a variety of components in the system including an electrical circuit supplying the transmission, the apply solenoid inside the trans, the torque converter itself, the PCM that controls the apply, etc. It is impossible to diagnose from afar. Unlikely that it is a "sensor" inside the trans as the PCM controls the VCC apply and uses engine and trans data that it receives from a variety of sources. If a "sensor" had failed the trouble code for that sensor would be setting......

Something as simple as the brake switch can cause the VCC to not apply correctly. There is a safety switch on the brake pedal that activates the brake lights and disconnects the VCC circuit. If it is misadjusted then the trans cannot apply the VCC. Lots of other trouble shooting items on the VCC system. If you don't have a service manual and cannot trouble shoot the system, I would recommend a Cadillac dealer as they have the trouble shooting information for the specific VCC that the Cadillac 4T80E trans has that a trans shop is simply not familiar with. No sense working on the trans until you actually know what is wrong.

Jan 13, 2010 | 2001 Cadillac DeVille

1 Answer

My 96 v6 4.0 grand cherokee is reading these codes

douple ck all the ground wiresto engine,trans bell housing ,battery or frame/firewall look for any that may have separated from any pack of wires or broken off eyelets then thightnen all points,,.these grounds are very important to comp/injection controls and can cause a multi code problem like yours.

May 05, 2009 | 1996 Jeep Grand Cherokee

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