P2100 on Jeep: Causes, Symptoms and Fix Cost
Quick Answer
Not safe to drive
P2100 on a Jeep means the engine computer found an open circuit in the wiring to the electric motor that opens and closes the throttle plate. With a broken circuit the computer cannot control the throttle, so the car typically goes into limp mode and may not respond to the pedal. The usual causes are damaged wiring or a corroded connector, a failed motor inside the throttle body, or a blown fuse feeding the throttle control.
- Severity
- High · Electrical
Connect a standard OBD2 adapter (Bluetooth LE on iPhone) to your Jeep and Skanyx tells you what P2100 means on that engine, whether it is safe to keep driving, and what the fix should cost. Free on iPhone and Android.
Get Skanyx freeWhat does P2100 mean on a Jeep?
The Quick Answer above is the generic definition. What follows is the model-specific detail for the Jeep models that log P2100.
Jeep Grand Cherokee
2005
A technician case on a 2005 Grand Cherokee with the 5.7 Hemi stored P2100 and P2111 and would not start. The computer had been replaced twice and a new throttle body fitted without a cure. A voltage drop test on the computer's power supply found a worn automatic shutdown relay, and replacing it fixed the car. It shows that a fault in the power feed can set a throttle motor code, so check supplies before parts.
Source: diag.net
Sources
- diag.net diag.net/discussion/snbxb8zbrjmb0ued0fhsemwaxk
What causes P2100 on a Jeep?
Beyond the generic causes listed on the main P2100 page, these are the patterns noted for Jeep models:
Faulty relay in the computer's power supply
: Jeep Grand Cherokee
Throttle body or wiring fault
: Jeep Grand Cherokee
How to diagnose P2100 on a Jeep with OBD2
- Read all stored codes and the freeze frame. P2101, P2135 or P2138 stored with it point to the throttle body or the pedal. A generic OBD2 reader shows the codes, the freeze frame and, where the car reports them, the standard throttle position and commanded throttle readings
- Check the battery and the engine ground first, because low voltage can set throttle motor codes, then look for a blown fuse in the throttle control circuit. Some cars have a dedicated electronic throttle fuse or relay
- Unplug the throttle body connector and look for corrosion, oil, water, bent or pushed-back pins. Wiggle the harness while the ignition is on to catch an intermittent break
- With the ignition off and the connector unplugged, measure the motor's resistance across its two pins and compare it with the manual. An infinite reading means an open winding. The motor and its drive circuit are not testable with a generic reader
- A manufacturer-level scan tool that can command the throttle motor, or a throttle position display, shows whether the plate moves when commanded. A gap between the commanded and the actual throttle position points at the throttle body
- A new throttle body does not always clear the code. If circuit resistance and the supply checks look fine, a workshop can scope the motor control lines while the car is driven before swapping parts again
- After fitting a throttle body, run the throttle adaptation. On some cars this is a key-on procedure and on others it needs manufacturer-level software, which a generic reader cannot run
How much does P2100 cost to fix on a Jeep? (EUR)
Estimated repair costs for P2100 in EUR, compiled across makes. Jeep costs typically sit in the middle of each range.
| Repair | Parts Cost | Labor Cost | Total Estimate | DIY Difficulty |
|---|---|---|---|---|
| Clean and reseat the throttle body connector | €0–€10 | €0–€40 | €0–€50 | Easy |
| Replace the throttle control fuse | €1–€10 | €0–€40 | €1–€50 | Easy |
| Repair throttle body wiring or connector | €10–€40 | €60–€180 | €70–€220 | Moderate |
| Replace electronic throttle body | €120–€450 | €30–€150 | €150–€600 | Moderate |
| Throttle adaptation with diagnostic software (where required) | €0–€0 | €30–€80 | €30–€80 | Professional |
Prices estimated as of October 2026. Costs vary by region, vehicle, and shop.
Codes related to P2100
These codes are often seen alongside P2100 or point to related issues, on any make:
Looking for the full P2100 reference (all makes, full diagnosis flow, complete repair cost matrix)? See the main P2100 guide