2002 Dodge Intrepid P0700 and P0840 Code: Transmission Sensor Issues and Diagnosis
My OBD2 scanner is showing codes P0700 and P0841 on my 2002 Dodge Intrepid R/T. The P0700 code was initially identified as a transmission input/output sensor issue, which I had replaced about one month and a half ago. Since then, the code has returned. The P0841 code indicates a problem with the left or right pressure switch sense circuit. I'm trying to understand where the P0841 sensor is located and whether my transmission needs to be replaced. My vehicle has a 3.5L High Output engine and has accumulated approximately 112,840 miles (182,000 km). The car drives normally under normal conditions, and I can reset the check engine light — but it returns when the issue reoccurs. I'm concerned because my mechanic suggested a full transmission replacement. However, I believe this may be an overreaction given that the vehicle otherwise performs well. Can anyone confirm what P0841 actually means and whether there are more likely causes than a complete transmission failure? Thank you, Mike Nemeth Windsor, Canada
A diagnostic code does not automatically mean a part needs replacement — it only indicates a problem within a system. P0700 is a generic code that means the transmission control module has triggered the check engine light because of an underlying transmission issue. This is directly linked to P0841. P0841 specifically refers to a fault in the left or right pressure switch sense circuit — this is typically an electrical problem, not mechanical failure. Possible causes include: - Intermittent wiring or loose connectors - Open circuit in the left/right pressure switch sense circuit - Open circuit in the transmission relay output - Short to ground or short to voltage in the pressure switch sense circuit - Faulty left/right pressure switch - PCM (Powertrain Control Module) misreading the pressure switch signal It's important to first perform a thorough electrical inspection and check for loose connections, corrosion, or damaged wiring before considering transmission replacement. Resetting the code may temporarily hide the issue but won't resolve the root cause.