How to Fix a Secondary Air Injection System Malfunction: Diagnosis and P0410

To fix a secondary air injection system malfunction, diagnose the system before replacing the pump. The fault could involve the pump, its fuse or wiring, the relay, hoses, check valves, or air passages. A code such as P0410 points to a secondary-air-system problem, but does not prove that the pump itself has failed. Start by… Read More: How to Fix a Secondary Air Injection System Malfunction: Diagnosis… »

What Causes a Blown Head Gasket? Common Causes, Symptoms and What to Do

Engine overheating is the most common cause of a blown head gasket. Excessive heat puts stress on the gasket and can warp engine components, weakening the seal between the cylinder head and engine block. Overheating is not the only possible cause, however, and overheating can also occur after the gasket fails. What is the most… Read More: What Causes a Blown Head Gasket? Common Causes, Symptoms and… »

Honda Accord Passenger Airbag Light: Meaning, Status, and What to Do

The Honda Accord passenger-airbag OFF indicator means the front passenger airbag is switched off by the vehicle’s passenger-seat classification system. It is a status indicator, not necessarily the same thing as the instrument-panel SRS/airbag warning light. Whether OFF is expected depends on the seat’s occupancy and how the system classifies it; check the owner’s manual… Read More: Honda Accord Passenger Airbag Light: Meaning, Status, and What to… »

U0101 Lost Communication With the TCM: Meaning, Causes, Symptoms & Fixes

“Lost communication with the transmission control module” means that one or more vehicle control modules are not receiving messages from the TCM over the vehicle’s communication network. The diagnostic trouble code commonly associated with this fault is U0101. It identifies a communication problem; it does not, by itself, prove that the TCM has failed or… Read More: U0101 Lost Communication With the TCM: Meaning, Causes, Symptoms &… »

Can a Bad Battery Cause P0335? Causes, Diagnosis and Fixes

Yes, a weak battery may contribute to a P0335 code indirectly if low voltage while starting affects whether the engine computer receives a usable crankshaft-position signal. But P0335 does not prove the battery is bad, and it does not automatically mean the crankshaft position sensor has failed. The battery, connections, and sensor circuit all need… Read More: Can a Bad Battery Cause P0335? Causes, Diagnosis and Fixes »

Why Won’t Your Transmission Go Into Gear? Causes, Symptoms & What to Do

A transmission that will not go into gear may have a fluid, shifter, clutch, electronic-control or internal mechanical problem; the symptom alone cannot identify the failed part. First, distinguish between a lever that will not select a gear, an automatic that selects Drive or Reverse but does not move, a manual car that is in… Read More: Why Won’t Your Transmission Go Into Gear? Causes, Symptoms &… »

Can Low Transmission Fluid Cause P0741? Causes, Fixes and Driving Risks

Yes. Low or degraded transmission fluid can contribute to a P0741 code by interfering with the hydraulic operation needed for the torque converter clutch (TCC) to engage. However, P0741 means the TCC is performing outside expected conditions or is stuck off; it does not confirm that the fluid is low or identify a failed part.… Read More: Can Low Transmission Fluid Cause P0741? Causes, Fixes and Driving… »