What does the trouble code 34 mean on a car?

Trouble Code 34 indicates that the Mass Air Flow ( MAF) sensor is reporting less air is entering the engine than makes sense based on RPM and TPS. The MAF sensor produces a frequency output; around 30 Hz at idle to 150 Hz under acceleration.

Where can I Find my GM trouble code?

If you own a 1982 to 1995 GM car or truck, you just might be able to read your trouble codes for free! If you have a connector like this under your dash, read on… (note: this connector may have a black plastic cover over it, so also look for a cover shaped like this, sorry for the messy wires here)

Where is the DLC on a GM 94?

Locate Data Link Connector (DLC), see image below. Turn Ignition switch to ON position. Count the flashes on the “ CHECK ENGINE ” or “ SERVICE ENGINE ” light. NOTE: Some 94 & 95 models do not have the B terminal. In which case a scanner is required.

What causes a GM car to have code 43?

Typical causes for this code 43 include: 1) BYPASS line is open or grounded 2) EST line is open or grounded 3) PROM or CALPACK not seated properly in the ECM 4) Poor connections between ignition module and ECM 5) Poor routing of EST harness and/or poor quality ignition wires (EMI induced electrical noise)

When to set code 32 on GM OBD?

The ECM monitors the Baro Sensor circuit. Code 32 can set when the circuit is open or shorted. 32 – Barometric Pressure Sensor Circuit fault. If the ECM monitors EGR operation. Code 32 can be set if the EGR system is not performing up to factory specifications.

What does GM OBD I trouble code chart mean?

GM OBD I Trouble Code Chart Code Description Code 12 No distributor reference pulse (diagnost Code 13 Oxygen sensor circuit open or no activit Code 14 Engine coolant temp sensor error (high t Code 15 Engine coolant temp sensor error (low te

Why does my engine have trouble code 42?

Trouble Code 42 indicates that there may be a malfunction in the Electronic Spark Timing (EST) system. During cranking, the timing is controlled by the ignition module while the ECM monitors the engine speed. When the engine speed exceeds 400 RPM, the ECM sends a BYPASS signal to the ignition module which switches the timing to ECM control.

What does trouble code 22 on GM W-body ECM mean?

NOTE: Presence of codes 33 and/or 34 may indicate that the MAP sensor is defective and is reading less than expected. This may cause the above set-conditions to be met falsely and this code to be set. Trouble Code 22 indicates that the Throttle Position Sensor (TPS) is reading abnormally low.

What does the trouble code 22 mean on a car?

Trouble Code 22 indicates that the Throttle Position Sensor ( TPS) is reading abnormally low. TPS volts should be close to 0.42 V at closed throttle and rise smoothly in about 0.02 volt increments to a maximum reading of about 4.85 volts at WOT. The conditions for setting this code are: TPS reading is < 0.20 volts

What does the code 45 mean on the ECM?

The ECM uses this information to adjust the amount of fuel delivered to each cylinder. Fault Code Description. 45 – Oxygen sensor error (rich condition indicated) On V-type engines with two O2 sensors, code 45 would indicate the left bank sensor is rich.

What does code 45 mean on oxygen sensor?

Fault Code Description. 45 – Oxygen sensor error (rich condition indicated) On V-type engines with two O2 sensors, code 45 would indicate the left bank sensor is rich.

What does trouble code 25 on GM W-body ECM mean?

Trouble Code 25 indicates that the Manifold Air Temperature (MAT) or Intake Air Temperature (IAT) sensor is reading higher than expected. When the air is cold, the thermistor has a high resistance, which falls as the air charge warms. High readings thus indicate possible short circuits in MAT circuit.

What was the Check Engine Light code for 1990-92?

32 (1990-92, all but Turbo) computer didn’t see change in air/’fuel ratio when EGR activated – check valve, vacuum lines, and EGR electrical 33 Air conditioning clutch relay circuit open or shorted (may be in the wide-open-throttle cutoff circuit)

What does trouble code 14 mean on a fuel tank?

Trouble Code 14 indicates that the Coolant Temperature Sensor ( CTS) is reporting abnormally high readings. CTS is used to control fuel mixture, timing, idle speed, TCC and EGR operations among others. The thermistor used has a low resistance when hot, rising as the coolant cools.

What does the trouble code 15 mean on a car?

Trouble Code 15 indicates that the Coolant Temperature Sensor ( CTS) is reporting abnormally low readings. CTS is used to control fuel mixture, timing, idle speed, TCC and EGR operation, among others. The thermistor used has a high resistance when cold, lowering as the coolant warms.