The 1989 Jeep Comanche has 3 recalls, the most serious affecting trucks with the 4-litre engine and automatic transmission, where a faulty throttle position sensor can cause the engine to idle at unexpectedly high speed right after startup, creating a loss of vehicle control if the transmission is shifted into gear before the idle settles.
The remaining two recalls involve emissions compliance, affecting different engine variants. On 2.5-litre models, defective catalytic converters and oxygen sensors cause the truck to fall outside allowable exhaust emissions standards. A separate filing covers the same emissions compliance failure on the other engine configurations in the lineup, again tracing back to catalysts and oxygen sensors that may not be functioning correctly. Neither emissions recall involves a direct safety hazard to the driver, but the affected components can degrade engine management over time if left unaddressed.
At a glance
What can fail
Vehicles with 2.5-liter engines may have faulty catalytic converters or oxygen sensors that don't meet emissions standards.
What the fix does
The catalytic converter and oxygen sensor will be replaced with redesigned parts.
Summarized — see the official notice for exact wording, dates, and contacts.
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At a glance
What can fail
The catalytic converter and oxygen sensor may be defective, causing the vehicle to fail emissions standards.
What the fix does
The catalytic converter and oxygen sensor will be replaced with redesigned parts.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
A faulty throttle position sensor on 4-liter automatic transmission vehicles causes intermittent high idle right after engine startup. Shifting into gear during high idle could cause loss of control.
What the fix does
The throttle position sensor will be replaced.
Summarized — see the official notice for exact wording, dates, and contacts.
