What does code 12 mean on GM OBD1?

If there are no additional trouble codes the light will continue to flash the code 12 which indicates there are no more codes stored. Code 12 is normal to sometimes flash first two or three times before the actual trouble code is displayed. Use a jumper wire and connect terminals A and B on the ALDL. 13 – Oxygen sensor circuit open

Which is the diagnostic code for a GMC check engine light?

1 Refer to our Generic OBD II code list for definitions on all other GMC diagnostic trouble codes. 2 Manufacturer Specific Codes 3 P1031 4 P1032 5 P1105 6 P1106 7 P1107 8 P1108 9 P1109 10 P1111

What are the symptoms of a bad engine control module?

1. Check Engine Light Turns On 2. Engine Stalling or Misfiring 3. Engine Performance Issues 4. Car Not Starting 5. Poor Fuel Economy The engine control module (ECM), also commonly referred to as the engine control unit (ECU) or powertrain control module (PCM), is one of the most important components found on virtually all modern vehicles.

Where is the trouble code on a GMC?

When retrieving GMC trouble codes with an OBD II scan tool, proceed as follows: 1. Connect scan tool to the 16-pin data link connector (DLC) located underneath the steering column. The connector may have a removable cover. 2. Turn the ignition on.

What is the diagnostic code for injector circuit malfunction?

All our repairs are backed by our 12-month / 12,000-mile warranty. P0200 is a generic OBD-II diagnostic trouble code in reference with the injector circuit Note: This code is similar to P0201, P0202, P0203, P0204, P0205, P0206, P0207, and P0208. And may be seen in conjunction to engine misfire codes, or engine lean and rich condition codes.

How does the PCM work on an injector?

The PCM works by monitoring the injector, and when the latter is activated, it determines whether the voltage pulled “low” or close to zero. When the injector is switched off, the PCM expects to see a voltage close to battery voltage or “high”.

What does the p0200 code on a fuel injector mean?

What the P0200 code means. P0200 means that the engine control module (ECM) has detected a malfunction in the fuel injector circuit.

What is the error code for cylinder 2 injector?

Corroded fuel injector, connections or wiring Poor or broken electrical connections in the connector or harness Open or short wiring harness for the cylinder 2 injector circuit Defective fuel injector power circuits As with most error codes, qualified mechanics check this error code by hooking it up to advanced scanner and check for the codes.

What kind of diagnostic code does a GM car have?

Article describes diagnostic trouble code definitions for GM manufactured vehicles made before 1995. Most GM cars (non classic) made before 1995 are equipped with the ODB1 computer operating system. This system is unique to the GM manufactured cars which include: Buick, Cadillac, Chevy, GMC, Oldsmobile and Pontiac.

How to retrieve GM OBD1 codes 2carpros?

31 – Camshaft position sensor fault 32 – EGR circuit fault 33 – Map sensor signal out of range, high 34 – Map sensor signal out of range, low 35 – Idle air control sensor circuit fault 36 – Ignition system circuit error 38 – Brake input circuit fault 39 – Clutch input circuit fault

What is the code for the Check Engine light?

The check engine light will begin to flash. Count the flashes. There will be a longer pause between the codes if you have several trouble codes and a shorter pause between the trouble codes’ digits. For example, code 16 = 1 flash * Pause * 6 flashes. When all trouble codes are outputted, it will flash the code 12 – 1 flash * Pause * 2 flashes.

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Can a low voltage cause an OBD1 code?

Low voltage can cause a lot of trouble with the troubleshooting and many error codes that we do not want. Put a jumper wire between PIN A and PIN B. Let the jumper wire sit there and turn the ignition to ON. Do not start the engine. The check engine light will begin to flash. Count the flashes.

When did the Chevy Lumina engine come out?

The Chevy Lumina was introduced by General Motors in 1990 and ran until 2001. This model had two different on-board diagnostic systems. Prior to 1996, OBD (on-board diagnostics) was integrated to help determine check engine codes. In 1996, the OBD II phase standardized and simplified the troubleshooting system.

What does code 12 mean on GM OBD?

The system will enter the diagnostic mode. In this mode, the computer will display a Code 12, three consecutive times, by flashing the “CHECK ENGINE”, “SERVICE ENGINE SOON” or “MALFUNCTION INDICATOR LAMP” or light. A Code 12 consists of one flash, a short pause, then two flashes in rapid succession.

How to reset the service engine light on a Chevy Lumina?

Leave the negative battery terminal disconnected for 10 to 15 minutes. Reconnect the negative battery terminal and recheck the service-engine-soon light by starting the car. Locate the diagnostic link connector (DLC) beneath the driver’s side dashboard. Plug the OBD II code reader and reset tool into the DLC.