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2000 Dodge Ram Van 5.2L - No Trouble Codes but TPS Failure Causes Bogging at Half Throttle

Model: 2000 dodge ram van 5.2 Fault Code: P0118 Posted: 2015-06-04 05:41

Has anyone experienced a faulty throttle position sensor (TPS) on a 2000 Dodge Ram Van 5.2L without any trouble codes? The vehicle runs smoothly up to half throttle, then suddenly bogs down and fails to respond with hard acceleration. This issue occurs at around 60,000 miles. Despite no check engine light or stored fault codes, the engine struggles to maintain RPM under load, indicating a potential TPS malfunction or related system failure.

Related fault codes
P0118
Comments (5)
Anonymous 2015-06-04 07:39

I have encountered faulty components like a bad TPS without any trouble codes appearing in the ECU. I'm curious—have you resolved this issue? If not, why is the focus on the TPS specifically?

Anonymous 2015-06-04 08:21

I'm currently working to fix this problem. When I apply throttle beyond one-third of its travel, the engine bogs down completely and fails to respond. It tries to rev but cannot maintain power. Any insights would be appreciated.

Anonymous 2015-06-04 09:22

Here’s a step-by-step approach to diagnose this issue: - Get the vehicle's system scanned—this is free at most auto parts stores (e.g., AutoZone, Advance Auto Parts, O'Reilly). Even if no check engine light is on, it's essential. - Post any detected codes here. - Confirm whether the vehicle has been modified or recently repaired. - Perform a fuel pressure test and a leak-down test at idle (KOEO). - Conduct an exhaust backpressure test or an engine vacuum check. *Many auto parts stores also offer loaner fuel pressure gauges for testing.

Anonymous 2015-06-04 17:05

Thanks! I've already scanned the vehicle using an OTC 3111 Pro and found no stored codes. The van is completely stock with no modifications or recent repairs.

Anonymous 2015-06-04 19:06

Hold the engine RPM steady at 1500 and observe whether vacuum pressure remains stable or gradually drops. A gradual drop suggests an exhaust restriction, which could be related to a failing TPS or downstream system issues.