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2001 Jeep Grand Cherokee Limited 4.7L - P0141 and P0161 O2 Heater Circuit Codes After Installing New Sensors

Model: 2001 Jeep Grand Cherokee Limited Fault Code: P0141 Posted: 2010-04-10 21:39

I recently replaced both the bank 1 and bank 2 oxygen (O2) sensors on my 2001 Jeep Grand Cherokee Limited with a 4.7L engine, resolving previous P0141 and P0161 codes. The vehicle ran smoothly and all diagnostic trouble codes were cleared yesterday. However, this morning while driving to work, the Check Engine Light (CIL) illuminated again, and my OBD2 scanner now shows both P0141 (O2 Heater Circuit - Bank 1 Sensor 2) and P0161 (O2 Heater Circuit - Bank 2 Sensor 2). The sensors installed were brand new, and the wiring harness was inspected yesterday—connections are clean, secure, and show no visible damage. Given that both sensors are new and properly installed, what could be causing these codes to reappear? I'm now concerned about whether the aftermarket sensors I purchased meet the vehicle's PCM requirements. Any insights or troubleshooting steps would be greatly appreciated. Thanks in advance for your help—I'm beginning to feel frustrated with recurring sensor issues. TM

Related fault codes
P0141P0161
Comments (5)
Anonymous 2010-04-11 08:30

Check for blown fuses and ensure proper voltage and ground connections to the O2 heater circuits. Also, verify where you purchased the sensors—were they OEM or aftermarket? Aftermarket sensors may not meet the PCM's specifications, leading to recurring codes. Consider returning them and replacing with factory-approved parts for better compatibility.

Anonymous 2010-04-11 11:12

You're absolutely right—many aftermarket O2 sensors, especially from brands like Bosch, are designed to be cost-effective but often fail to meet the exact requirements of the vehicle's engine control module (PCM). This can result in persistent codes even after replacement. I'd recommend returning your Bosch sensors and ordering OEM or factory-matched parts directly from a dealership or trusted supplier. It’s not just about price—quality and compatibility matter significantly.

Anonymous 2010-04-11 23:26

Thanks for the tip! I'll reach out to Rockauto today to initiate an RMA (Return Merchandise Authorization) for my Bosch sensors. I'm expecting high shipping costs due to their Hawaii-based pricing, but it's worth trying to get a replacement that works properly. Appreciate the advice!

Anonymous 2010-04-12 05:32

If OEM Bosch isn't available or too expensive, consider NTK oxygen sensors—these are factory-original parts used in the 2001 Jeep Grand Cherokee Limited and are known to be compatible with the vehicle's system. While they may cost similarly to dealer prices, they're more likely to pass emissions and sensor diagnostics. Check the NTK website for part numbers specific to your model year and engine type. Let me know how it goes!

Anonymous 2010-04-12 09:17

Here's a reliable source offering genuine Mopar-style O2 sensors: http://www.moparpartsamerica.com/pages/...geid=10171 (price: $63.44). These are designed for the 2001 Jeep Grand Cherokee Limited and may offer better compatibility than aftermarket brands.