Pulling Codes: This One Didn’t Go ‘Zoom Zoom’! The Story Of P1345
Top EPA Codes: Carlton Banks investigates a P1345 code – CMP Sensor Circuit Malfunction – in a 2000 Mazda Protege. This is a code that involves the cam sensor input to the PCM. In many situations, one may be tempted to replace the cam sensor right away. This article will attempt to provide a possible plan of attack.
Tech Tip: Cold Temps Set DTC On Some GM Vehicles
Some GM customers may find that their vehicle’s malfunction indicator lamp (MIL) illuminates after starting the vehicle when using the engine coolant heater in very cold ambient temperatures.
Tech Tip: Subaru Impreza With DTCs P0705, P0851, P2746, P2750 And/Or No Crank, No Start
If you receive a customer concern of a Check Engine light, AT Temp light or a no engine crank condition, the wiring harnesses to the transmission range sensor (inhibitor switch) should be closely inspected for damage or a short circuit to the CVT transmission case.
Tech Tip: Hyundai Resetting PCM/TCM Adaptive Values
The PCM or TCM contains logic to adjust solenoid duty and line pressure as needed to compensate for normal clutch wear over the life of the transaxle. This bulletin provides the procedures necessary to reset (erase) and “relearn” the PCM/TCM adaptive values.
Tech Tip: Water Intrusion From A/C Drain May Cause DTCs On Ford SUVs
A DTC may appear on some 2006-’10 Ford Explorer, Mercury Mountaineer and 2007-’10 Explorer Sport Trac vehicles due to water traveling down from the A/C drain into the solenoid body connector on the left side of the transmission.
VIEWPOINT: Brake Reflashing takes Centerstage
How a moose and a Cherokee could change your brake business.
Tech Tip: GMs, Hummers and Saabs May Experience Intermittent MIL with DTC P2138 and Reduced Power
Some customers may comment on an intermittent malfunction indicator lamp (MIL) being illuminated with a message or an indicator that displays Reduced Engine Power.
Tech Tip: Dodge Neon Sport Code P0340 Intermittently
Customer complains the vehicle bucks and misses intermittently while driving. Code P0340 is stored. This code may be caused by the camshaft position sensor.
Tech Tip: Honda Has MIL On with DTC P1457
The EVAP bypass solenoid valve can fail due to corrosion, caused by water getting inside. If the water contains road salt, the solenoid windings could corrode, causing the valve to fail. In a few rare instances, the corrosion could be severe enough to cause an internal short in the solenoid valve, which could damage the ECM/PCM. If this happens, both the bypass solenoid valve and the ECM/PCM would need to be replaced.
Diagnostic Dilemmas: 8 Simple Rules …
Many of the “Diagnostic Dilemmas” Gary Goms is called upon to solve aren’t really all that complicated – but were caused by basic oversights and incorrect assumptions on the part of the technician. This situation has largely been caused by a lack of training and, in some cases, poor training.
Diagnostic Solutions: The Relationship Between PCMs, Sensors and Actuators
Not that I recommend installing used PCMs, but I occasionally need a rebuildable core to replace a missing or badly damaged powertrain control module (PCM). But lately, I’ve noticed that it’s becoming increasingly difficult to find a used PCM for an older import at a local auto salvage yard. While it’s sheer speculation on my part, this apparent shortage of PCM cores might be caused by too many poorly trained technicians replacing PCMs to solve sensor-based problems. In most of these cases, the problem remains unsolved even as the original and fully functional PCM is casually tossed into the trash when the tech moves on to another job.
Tech Tip: Hyundai Has Check Engine Light On with Fuel System Lean Code
The check engine light is on with a post catalyst fuel system lean code P2096, an oxygen (O2) sensor stuck lean B1/S2 code P2270, and an O2 sensor no activity B1/S2 code P0140.