2000 Jeep Cherokee P0705: Trans Range Sensor Circuit PRDNL Input Fault - Diagnosis and Fixes
I'm experiencing a P0705 fault code on my 2000 Jeep Cherokee Sport. The diagnostic reads 'Trans Range Sensor Circuit PRDNL input'. I initially thought regular Jeep Cherokees don't have this sensor, but the shop suggested it might be caused by a neutral safety switch. They replaced that component and charged $700 — after which I've driven only 6 miles before the check engine light returns. My question is: what other potential causes could trigger P0705 in a 2000 Jeep Cherokee Sport? The code indicates an issue with the PRNDL (Park, Reverse, Neutral, Drive) circuit to the Powertrain Control Module (PCM). Possible root causes include damaged wiring, faulty connectors, or a defective switch. I'm seeking advice from experienced users on how to properly diagnose and resolve this issue without relying on guesswork. I've been told that 'there's only one other thing' is not a valid diagnostic approach — it's essential to perform proper diagnostics using a scan tool to verify transmission gear shifts when the selector is moved through positions. Without actual data, any repair feels like a hunch.
My first step would be to use a scan tool to check if the transmission actually shifts through gears when the gear selector is manually moved. The shop replaced the PRNDL module, but did they inspect the wiring harness or perform any comprehensive diagnostics? It sounds like they were making assumptions without evidence. You should never rely on 'only one other possibility' — that's not how automotive troubleshooting works. A P0705 code typically points to a fault in the PRNDL circuit to the PCM, which could stem from damaged wiring, corroded connectors, or a faulty switch. Finding a qualified technician with proper diagnostic tools is critical before replacing parts blindly.