1999 Chrysler Concord 3.2L P0340 and P0112 Codes: Causes, Diagnosis, and Fixes
My 1999 Chrysler Concord with a 3.2L engine and 105,000 miles has recently developed two OBD-II fault codes: P0340 (Camshaft Position Sensor) and P0112 (Intake Manifold Temperature Sensor). The check engine light came on while driving, but there is no noticeable change in engine performance. After using an OBD scanner at home, both codes persist. I replaced the camshaft position sensor to address the P0340 code, but the issue remains. The intake manifold temperature reading consistently shows over 200°F, indicating a significant problem. I'm wondering if it's merely coincidental that both sensors failed simultaneously, and whether replacing just the camshaft sensor should have resolved the P0340 issue. The engine takes noticeably longer to crank before starting, but once running, it operates smoothly. What could be causing this behavior? Are there known issues with the 1999 Chrysler Concord 3.2L's sensor wiring or electrical system? Any insights or troubleshooting steps would be greatly appreciated. bh
Hi! It's possible the failures are coincidental, but it's more likely you're dealing with two separate issues. First, check your Intake Air Temperature (IAT) sensor and its wiring for shorts or damage. For the camshaft position sensor issue, verify that the harness is receiving proper voltage and inspect the wiring for any breaks or corrosion. Additionally, while not a universal rule, it's possible both sensors are affected by shared power supply or ground connections—damaged wiring could impact both sensors simultaneously. This shared circuit scenario might explain why replacing just one sensor doesn't resolve the P0340 code.