Understand the car, don't just erase mistakes.
Code P0106 indicates an incorrect signal from the manifold absolute pressure (MAP/BARO) sensor, affecting fuel calculation and engine operation. Below is a quick overview, step-by-step diagnostics, and solutions from simple…
P0507 – idle speed higher than normal. The engine control module registers this code when the actual idle speed consistently exceeds the target range (usually 600–900 rpm for gasoline engines).…
Code P0401 indicates insufficient exhaust gas recirculation (EGR) flow. This means the PCM has detected an “insufficient flow detected” condition—the EGR system is not returning the required amount of exhaust…
OBD-II code P0113 indicates a “high signal level in the intake air temperature (IAT) sensor circuit.” When the control module detects a voltage above 4.91 V for 0.5 seconds or…
The information is general and does not replace professional consultation. Code P0123 is a diagnostic signal from the PCM indicating that the voltage in the throttle position sensor circuit exceeds…
DTC P0122 means “Throttle Position Sensor A Circuit Low Input.” The ECM records this when the TPS voltage drops below 0.17–0.2 V instead of the expected 0.5–4.5 V. This can…
The information is general and does not replace professional consultation. Code P0102 indicates a low signal level from the mass air flow sensor (MAF). This page provides a quick action…
Code P0101 is a signal from the powertrain control module (PCM) indicating that the readings from the mass air flow (MAF) sensor are outside the expected range. In simple terms,…
This guide covers common P0100 causes and checks. Exact test values and repair steps depend on the vehicle, engine, and service information. Code P0100 is a diagnostic trouble code (DTC)…
Code P0171 is a message from the engine control module (ECM) indicating that the air-fuel mixture in the first cylinder bank (Bank 1) is too lean. The engine receives more…